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Morphology and anatomy of leaf miners in two species of Commelinaceae (Commelina diffusa Burm. f. and Floscopa glabrata (Kunth) Hassk); Morfologia e anatomia de minas foliares em duas espécies de Commelinaceae Commelina diffusa Burm. f. e Floscopa glabrata (Kunth) Hassk)

ELB, Paula Maria; MELO-DE-PINNA, Gladys Flávia; MENEZES, Nanuza Luiza de
Fonte: Sociedade Botânica do Brasil Publicador: Sociedade Botânica do Brasil
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
47.54487%
In specialized literature, reports on anatomy of miners in host plants are few in number. These agents trigger excavations, or paths, by consumption of plant inner tissues by larvae of several insects. The aim of this work was to investigate leaf miner occurrence in Commelina diffusa (a cosmopolitan plant) and Floscopa glabrata (an amphibious plant) using anatomical techniques. The place where the plants were collected is subjected to seasonal floods, consequently both the species were exposed to the same weather conditions and seasonal floods. This study showed that members of Agromyzidae and Chironomidae families, which are Diptera endophytophagous larvae types, were responsible for the tunnels. Moreover, in Commelina diffusa Agromyzidae larvae were found, while in Floscopa glabrata three Chironomidae cephalic exuviae were found. The miners, as can be seen from anatomical studies, used only mesophyll parenchyma tissues for feeding, causing the formation of linear mines. In addition, in both the species, the epidermis and the medium-sized vascular units were kept intact, showing no structural modification, such as neoformation of tissues.; Existem poucos relatos na literatura sobre anatomia de plantas parasitadas por agentes minadores...

Influência do déficit hídrico no crescimento, acúmulo de carboidratos de reserva e na anatomia e ultra-estrutura do rizoma de Costus arabicus L. (Costaceae, Monocotiledoneae); Effect of water deficit on growth, accumulation of reserve carbohydrates and anatomy and ultrastructure of the rhizome of Costus arabicus L. (Costaceae, Monocotyledoneae)

Costa, Vanessa Pires da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 17/09/2010 Português
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Costus arabicus L. é uma espécie herbácea, nativa da Mata Atlântica, conhecida popularmente como costus, canela-de-ema, cana-do-brejo, cana-de-macaco e gengibre-espiral, que é comumente utilizada como planta ornamental e na medicina popular. O órgão subterrâneo (rizoma) dessa espécie acumula amido como principal carboidrato de reserva. O estresse hídrico por falta de água é um dos fatores ambientais mais importantes que podem regular o crescimento e desenvolvimento das plantas, limitando sua produção e levando também a alterações nas características fisiológicas, bioquímicas e anatômicas. Desse modo, a deficiência hídrica destaca-se como fator adverso ao crescimento e à produção vegetal por alterar a eficiência com que os fotoassimilados são convertidos para o crescimento e desenvolvimento das plantas. O objetivo deste trabalho foi avaliar a influência do déficit hídrico no crescimento e acúmulo de carboidratos de reserva em plantas de Costus arabicus L., assim como na anatomia e ultra-estrutura do rizoma. O déficit hídrico foi imposto às plantas em duas épocas diferentes (inverno e verão) através dos seguintes tratamentos: plantas irrigadas diariamente (controle) e irrigadas a cada 7 (7d) e 15 dias (15d). Foram avaliados a umidade do solo...

Ciclo de vida, fenologia e anatomia floral de Pilostyles (Apodanthaceae - Rafflesiaceae s.l.): subsídios para um posicionamento filogenético da família Apodanthaceae; Life cycle, phenology and floral anatomy of Pilostyles (Apodanthaceae - Rafflesiaceae s.l.): phylogenetic position allowances for Apodanthaceae family

Brasil, Bianca de Azevedo
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 15/10/2010 Português
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As plantas holoparasitas dependem inteiramente de recursos retirados do xilema e floema hospedeiros e são representadas atualmente por pelo menos sete linhagens, cujo posicionamento filogenético continua sendo revisto. A família Apodanthaceae inclui plantas aclorofiladas, holoparasitas de caules, cujo corpo vegetativo apresenta extrema redução. Por serem endoparasitas, tornam-se evidentes apenas na época da floração, quando as diminutas flores rompem a periderme do hospedeiro. Incluem-se nessa família três gêneros, sendo Pilostyles o de mais ampla distribuição. Apesar de existirem estudos minuciosos sobre o sistema endofítico no gênero, sua fenologia, ciclo de vida e ontogênese floral continuam desconhecidos. O presente estudo objetiva elucidar essas questões, de modo a proporcionar uma compreensão do sistema reprodutivo e do processo evolutivo das flores dessas intrigantes angiospermas, servindo de base para estudos futuros que visem a estabelecer homologias com outros clados. Primeiramente foi realizado um levantamento dos hospedeiros parasitados, analisando-se padrão de distribuição das flores e a razão sexual das populações de Pilostyles existentes nas áreas de estudo no Brasil e México. Indivíduos foram selecionados aleatoriamente para a realização dos testes de polinização...

Biomassa, apectos nutricionais e anatomicos de individuos jovens de especies arboreas de Cerradão e Floresta Estacional Semidecidual; Biomass, nutritional status and ecological anatomy of saplings of tree species of Savannah and Semidecidous Forestof the Wst Paulista

Marta Regina Almeida Muniz
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 28/01/2010 Português
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O presente abordou aspectos da relação solo-planta, verificando o reflexo das condições físico-químicas e da disponibilidade hídrica do solo de áreas de Cerradão (Ce) e de Floresta Estacional Semidecidual (FES), sobre a anatomia do xilema secundário, sobre aspectos morfológicos (comprimento e a biomassa de parte aérea e de raízes), e sobre o teor, a quantidade e a distribuição de nutrientes e alumínio em plantas jovens de espécies arbóreas. O objetivo geral foi comparar plantas jovens de espécies arbóreas de Cerradão e de Floresta Estacional Semidecidual quanto ao crescimento proporcional em parte aérea e raízes, a distribuição da biomassa, aos teores e conteúdo de nutrientes e de alumínio, e a organização do xilema secundário, a fim de elucidar se há diferenças entre essas formações. O trabalho foi desenvolvido em duas parcelas de 10 ha de Cerradão (Estação Ecológica de Assis; Assis, SP) e de Floresta Estacional Semidecidual (Estação Ecológica de Caetetus; Gália, SP) que são mantidas pelo projeto temático "Parcelas Permanentes". Este trabalho foi dividido em dois capítulos: o primeiro relacionado a aspectos morfológicos, como comprimento total da parte aérea e raízes, biomassa, e teores...

Anatomy and physiology of Cattail as related to different population densities

CORRÊA,F.F.; MADAIL,R.H.; BARBOSA,S.; PEREIRA,M.P.; CASTRO,E.M.; SORIANO,C.T.G.; PEREIRA,F.J.
Fonte: Sociedade Brasileira da Ciência das Plantas Daninhas Publicador: Sociedade Brasileira da Ciência das Plantas Daninhas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2015 Português
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The objective of this work was to evaluate the effects of the population density of Typha angustifolia plants in the anatomical and physiological characteristics. Plants were collected from populations of high density (over 50% of colonization capacity) and low density (less than 50% of colonization capacity) and cultivated under controlled greenhouse conditions. Plants from both populations were grown in plastic trays containing 4 L of nutritive solution for 60 days. At the end of this period, the relative growth rate, leaf area ratio, net assimilatory rate, root/shoot ratio, leaf anatomy, root anatomy, and catalase and ascorbate peroxidase activities were evaluated. Plants from high density populations showed increased growth rate and root/shoot ratio. Low density populations showed higher values of stomatal index and density in leaves, as well as increased palisade parenchyma thickness. Root epidermis and exodermis thickness as well as the aerenchyma proportion of high density populations were reduced, these plants also showed increased vascular cylinder proportion. Only catalase activity was modified between the high and low density populations, showing increased values in low density populations. Therefore, different Typha angustifolia plants show differences in its anatomy and physiology related to its origins on high and low density conditions. High density population plants shows increased growth capacity related to lower apoplastic barriers in root and this may be related to increased nutrient uptake capacity.

Morphology and anatomy of leaf miners in two species of Commelinaceae (Commelina diffusa Burm. f. and Floscopa glabrata (Kunth) Hassk)

Elb,Paula Maria; Melo-de-Pinna,Gladys Flávia; Menezes,Nanuza Luiza de
Fonte: Sociedade Botânica do Brasil Publicador: Sociedade Botânica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2010 Português
Relevância na Pesquisa
47.54487%
In specialized literature, reports on anatomy of miners in host plants are few in number. These agents trigger excavations, or paths, by consumption of plant inner tissues by larvae of several insects. The aim of this work was to investigate leaf miner occurrence in Commelina diffusa (a cosmopolitan plant) and Floscopa glabrata (an amphibious plant) using anatomical techniques. The place where the plants were collected is subjected to seasonal floods, consequently both the species were exposed to the same weather conditions and seasonal floods. This study showed that members of Agromyzidae and Chironomidae families, which are Diptera endophytophagous larvae types, were responsible for the tunnels. Moreover, in Commelina diffusa Agromyzidae larvae were found, while in Floscopa glabrata three Chironomidae cephalic exuviae were found. The miners, as can be seen from anatomical studies, used only mesophyll parenchyma tissues for feeding, causing the formation of linear mines. In addition, in both the species, the epidermis and the medium-sized vascular units were kept intact, showing no structural modification, such as neoformation of tissues.

Comparative leaf anatomy and morphology of some Brazilian species of Crotalaria L. (Leguminosae: Papilionoideae: Crotalarieae)

Devecchi,Marcelo Fernando; Pirani,José Rubens; Melo-de-Pinna,Gladys Flávia de Albuquerque
Fonte: Sociedade Botânica do Brasil Publicador: Sociedade Botânica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2014 Português
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Anatomical characters often provide strong taxonomic evidence and many times help define species whose morphological limits are in question. This study aimed to survey characters of the leaf anatomy of 16 species of Crotalaria L. occurring mostly in the cerrado (savanna) of central Brazil and in areas of restinga (coastal woodland, or sandy forest) along the coast of the country, in order to improve the current taxonomic circumscription of sections and species. Leaf samples were collected in the field and obtained from herbarium specimens. Standard techniques in plant anatomy were employed, including analyses under light and scanning electron microscopy. Many of the characters analyzed are relatively uniform, but some are diagnostic for species. At the section level, only trichomes with a base composed of radially distributed cells proved useful in the diagnosis of C. sect. Calycinae. The other characters analyzed showed interspecific variation, but no diagnostic value for recognition of the sections. At the species level, unlike the results found for sections, various characters have diagnostic value. Among the characters with diagnostic value at the species level, those related to texture, the venation pattern (such as the formation of areolas and insertion of the ribs secondary to midrib)...

Morphology and anatomy of a leaf mine in Vismia guianensis (Aubl.) Choisy (Clusiaceae) in a fragment of Brazilian Atlantic forest

Almeida-Cortez,J. S.; Melo-de-Pinna,G. F. A.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/05/2006 Português
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Mines or hyponomes are channels caused by larva miners consuming internal plant tissues. These miners live on the leaf and feed from these tissues. Leaf mines are usually visible on the exterior of the leaf as serpentine paths, blotches, or other characteristic shapes of discolored tissues. Morphological and structural modifications undergone by mined leaves of Vismia guianensis (Aubl.) Choisy are presented here with the purpose of elucidating their structure and to contribute to studies about insect-plant interactions. Healthy and mined leaves were harvested from thirty plants and taken to the laboratory. For each branch, the total number of young and mature leaves, the number of leaves with mines and the number of mine per leaf were counted. Transverse sections of healthy and mined leaves were obtained to observe the morpho-anatomic aspects. From the 1,438 mature leaves and 379 young leaves analyzed, 214 (14.9%) and 70 (18.5%) were mined, where most of the leaves (67%) presented one mine per leaf. Transverse sections of the mine revealed that the larva consumed only mesophyll parenchyma tissue and the epidermis remains intact. There is not a pattern of leaf mining, but the larvae did not consume the druses observed on mesophyll and the vascular tissues of the mid-vein and lateral vein.

Comparative anatomy of the leaves of Piper lepturum (Kunth) C.DC. var. lepturum and Piper lepturum var. angustifolium (C.DC.) Yunck.

Machado,Nelson Santana de Oliveira; Pereira,Flaviane Gomes; Santos,Paulo Roberto Dias dos; Costa,Cecília Gonçalves; Guimarães,Elsie Franklin
Fonte: Instituto de Botânica Publicador: Instituto de Botânica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2015 Português
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This study showed anatomical differences related to Piper lepturum var. lepturum and P. lepturum var. angustifolium species, sometimes considered varieties and in other cases synonyms. For histological analysis, fully expanded leaves were collected and for analysis by scanning electron microscope (SEM), fragments from the midrib were fixed on both leaf surfaces. The two species revealed differences in plant anatomy and it was observed that the stem of P. lepturum var. lepturum showed persistent wings and papillary epidermal cells, and these characters are absent in P. lepturum var. angustifolium. There was also the presence of raphides only in the lamina leaf and petiole of P. lepturum var. angustifolium, differentiating the two species. Recent studies have shown the importance of plant anatomy with species where there are issues related to taxonomic delimitation.

The Plant Structure Ontology, a Unified Vocabulary of Anatomy and Morphology of a Flowering Plant1[W][OA]

Ilic, Katica; Kellogg, Elizabeth A.; Jaiswal, Pankaj; Zapata, Felipe; Stevens, Peter F.; Vincent, Leszek P.; Avraham, Shulamit; Reiser, Leonore; Pujar, Anuradha; Sachs, Martin M.; Whitman, Noah T.; McCouch, Susan R.; Schaeffer, Mary L.; Ware, Doreen H.; S
Fonte: American Society of Plant Biologists Publicador: American Society of Plant Biologists
Tipo: Artigo de Revista Científica
Publicado em /02/2007 Português
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Formal description of plant phenotypes and standardized annotation of gene expression and protein localization data require uniform terminology that accurately describes plant anatomy and morphology. This facilitates cross species comparative studies and quantitative comparison of phenotypes and expression patterns. A major drawback is variable terminology that is used to describe plant anatomy and morphology in publications and genomic databases for different species. The same terms are sometimes applied to different plant structures in different taxonomic groups. Conversely, similar structures are named by their species-specific terms. To address this problem, we created the Plant Structure Ontology (PSO), the first generic ontological representation of anatomy and morphology of a flowering plant. The PSO is intended for a broad plant research community, including bench scientists, curators in genomic databases, and bioinformaticians. The initial releases of the PSO integrated existing ontologies for Arabidopsis (Arabidopsis thaliana), maize (Zea mays), and rice (Oryza sativa); more recent versions of the ontology encompass terms relevant to Fabaceae, Solanaceae, additional cereal crops, and poplar (Populus spp.). Databases such as The Arabidopsis Information Resource...

The Plant Ontology as a Tool for Comparative Plant Anatomy and Genomic Analyses

Cooper, Laurel; Walls, Ramona L.; Elser, Justin; Gandolfo, Maria A.; Stevenson, Dennis W.; Smith, Barry; Preece, Justin; Athreya, Balaji; Mungall, Christopher J.; Rensing, Stefan; Hiss, Manuel; Lang, Daniel; Reski, Ralf; Berardini, Tanya Z.; Li, Donghui;
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
Português
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The Plant Ontology (PO; http://www.plantontology.org/) is a publicly available, collaborative effort to develop and maintain a controlled, structured vocabulary (‘ontology’) of terms to describe plant anatomy, morphology and the stages of plant development. The goals of the PO are to link (annotate) gene expression and phenotype data to plant structures and stages of plant development, using the data model adopted by the Gene Ontology. From its original design covering only rice, maize and Arabidopsis, the scope of the PO has been expanded to include all green plants. The PO was the first multispecies anatomy ontology developed for the annotation of genes and phenotypes. Also, to our knowledge, it was one of the first biological ontologies that provides translations (via synonyms) in non-English languages such as Japanese and Spanish. As of Release #18 (July 2012), there are about 2.2 million annotations linking PO terms to >110,000 unique data objects representing genes or gene models, proteins, RNAs, germplasm and quantitative trait loci (QTLs) from 22 plant species. In this paper, we focus on the plant anatomical entity branch of the PO, describing the organizing principles, resources available to users and examples of how the PO is integrated into other plant genomics databases and web portals. We also provide two examples of comparative analyses...

A anatomia foliar poderia explicar a presença de espécies perenes nas florestas estacionais deciduais?; The leaf anatomy could explain the presence of perennial species in deciduous forests?

Pereira, Lorrayna Guedes
Fonte: Universidade Federal de Uberlândia Publicador: Universidade Federal de Uberlândia
Tipo: Dissertação
Português
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Embora a maioria das espécies ocorrentes nas florestas estacionais deciduais perca suas folhas durante a estação seca, algumas delas apresentam estratégias alternativas, tais como, a mudança no posicionamento das folhas de horizontal para vertical, para reduzir a transpiração. Este estudo descreve a anatomia foliar de nove dessas espécies de planta que reduzem a perda de água, durante a estação seca, usando a estratégia do movimento foliar e não a de apresentarem abscisão foliar. As espécies estudadas foram Piper aduncum sp. L. (Piperaceae), Acalypha gracilis Müll. Arg. (Euphorbiaceae), Casearia sylvestris Sw. (Salicaceae), Bauhinia ungulata L. (Fabaceae: Caesalpinoideae), Calyptranthes widgreniana Berg. (Myrtaceae), Trichilia elegans A. Juss (Meliaceae), Guarea guidonia (L.) Sleumer (Meliaceae), Myrsine umbellata Mart. (Myrsinaceae) e Psychotria carthagenensis Jacq. (Rubiaceae) do Parque Estadual do Pau Furado (Triângulo Mineiro). As amostras do limbo e do pecíolo foram processadas de acordo com as técnicas usuais para anatomia vegetal. Nenhum padrão anatômico geral foi encontrado para o pecíolo nas espécies analisadas. No entanto, foram observadas algumas características anatômicas comuns a todas elas, como: (a) tecido de sustentação...

Roles of Morphology, Anatomy, and Aquaporins in Determining Contrasting Hydraulic Behavior of Roots

Bramley, H.; Turner, N.; Turner, D.; Tyerman, S.
Fonte: Amer Soc Plant Physiologists Publicador: Amer Soc Plant Physiologists
Tipo: Artigo de Revista Científica
Publicado em //2009 Português
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The contrasting hydraulic properties of wheat (Triticum aestivum), narrow-leafed lupin (Lupinus angustifolius), and yellow lupin (Lupinus luteus) roots were identified by integrating measurements of water flow across different structural levels of organization with anatomy and modeling. Anatomy played a major role in root hydraulics, influencing axial conductance (L(ax)) and the distribution of water uptake along the root, with a more localized role for aquaporins (AQPs). Lupin roots had greater L(ax) than wheat roots, due to greater xylem development. L(ax) and root hydraulic conductance (L(r)) were related to each other, such that both variables increased with distance from the root tip in lupin roots. L(ax) and L(r) were constant with distance from the tip in wheat roots. Despite these contrasting behaviors, the hydraulic conductivity of root cells (Lp(c)) was similar for all species and increased from the root surface toward the endodermis. Lp(c) was largely controlled by AQPs, as demonstrated by dramatic reductions in Lp(c) by the AQP blocker mercury. Modeling the root as a series of concentric, cylindrical membranes, and the inhibition of AQP activity at the root level, indicated that water flow in lupin roots occurred primarily through the apoplast...

Simultaneous dehydration and infiltration with (2-hydroxyethyl)-methacrylate (HEMA) for lipid preservation in plant tissues

Oliveira,João Marcelo Santos de
Fonte: Sociedade Botânica do Brasil Publicador: Sociedade Botânica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 Português
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Although this study aims to develop an improved method for the preservation of reserve lipids in plant tissues for different uses in plant anatomy, it mostly aims to develop an improved method for the identification of lipid reserves where synthesis or storage occurs. The proposed procedures entail only the utilization of (2-hydroxyethyl)-methacrylate (HEMA) as a dehydration agent. One of the procedures is based on the gradual exchange of aqueous HEMA solutions with increasing concentrations. In another procedure, dehydration and infiltration are induced by the presence of silica gel around a modified microcentrifuge tube containing the aqueous HEMA solution with the plant tissues, thus allowing efficient lipid preservation. Both procedures resulted in simultaneous dehydration and infiltration of the endosperm and embryo of Ricinus communis, while eliminating the use of ethyl alcohol, thus providing better lipid preservation.

Butia capitata (Mart.) Becc. lamina anatomy as a tool for taxonomic distinction from B. odorata (Barb. Rodr.) Noblick comb. nov (Arecaceae)

SANT'ANNA-SANTOS,BRUNO F.; CARVALHO JÚNIOR,WELLINGTON G.O.; AMARAL,VANESSA B.
Fonte: Academia Brasileira de Ciências Publicador: Academia Brasileira de Ciências
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2015 Português
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The distinction between Butia capitata and B. odorata is based only on a few morphological characteristics, therefore there is a need for additional studies for supporting the separation of the species. As lamina anatomy characteristics are relevant in circumscribing Arecaceae taxa, this work aimed to describe B. capitata lamina anatomy and compare it with B. odorata. Samples from the middle portion of the pinnae were collected and processed in accordance with standard plant anatomy techniques. The epidermis is uniseriate and composed of a thick cuticle and epicuticular waxes into like hooked filaments. The subsidiary cells that arch over the guard cells are located at the hypodermis. The mesophyll is isobilateral and compact. The vascular bundles are collateral with a sclerenchymatic sheath extension that reaches the hypodermis. The stegmata cells have spherical and druse-like silica bodies. The midrib faces the adaxial surface with a thick fibrous layer surrounding the vascular bundles adjacent to the chlorenchyma. The stratified expansion tissue is on the abaxial surface, within the boundary between the mesophyll and midrib. Raphides are only found in B. capitata. Small bundles of the midrib fully surround the fibrous cylinder only in B. odorata. These characteristics are diagnostic and useful for supporting the proposed separation.

The effects of elevated CO2 concentrations on cell division rates, growth patterns, and blade anatomy in young wheat plants are modulated by factors related to leaf position, vernalization, and genotype.

Masle, Josette
Fonte: American Society of Plant Biologists Publicador: American Society of Plant Biologists
Tipo: Artigo de Revista Científica
Português
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This study demonstrates that elevated [CO2] has profound effects on cell division and expansion in developing wheat (Triticum aestivum L.) leaves and on the quantitative integration of these processes in whole-leaf growth kinetics, anatomy, and carbon content. The expression of these effects, however, is modified by intrinsic factors related to genetic makeup and leaf position, and also by exposure to low vernalizing temperatures at germination. Beyond these interactions, leaf developmental responses to elevated [CO2] in wheat share several remarkable features that were conserved across all leaves examined. Most significantly: (a) the contribution of [CO2] effects on meristem size and activity in driving differences in whole-blade growth kinetics and final dimensions; (b) an anisotropy in cellular growth responses to elevated [CO2], with final cell length and expansion in the paradermal plane being highly conserved, even when the rates and duration of cell elongation were modified, while cell cross-sectional areas were increased; (c) tissue-specific effects of elevated [CO2], with significant modifications of mesophyll anatomy, including an increased extension of intercellular air spaces and the formation of, on average, one extra cell layer...

Wood anatomy of canela-preta: Ocotea catharinensis Mez. (Lauraceae); Anatomia da madeira de canela-preta: Ocotea catharinensis Mez. (Lauraceae)

Silva, Márcio da; Universidade Federal de Santa Catarina; Medeiros, João De Deus; Universidade Federal de Santa Catarina
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; Formato: application/pdf
Publicado em 01/01/2000 Português
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The wood anatomy of Ocotea catharinensis (Lauraceae) is ptesented. O.catharinensis is a typical and exclusive tree of Atlantic rain forest, nowadays included in the brazilian list of rare or threatened species. Studies of this nature supply subsidies so much for identification taxonomic, as well as for filogenetics interpretations, aiding in the resolution oftaxonomics problems in complex botanical groups, in order to improve an appropriate filogenetic system. O. catharinensis presents a11 the anatomical features described in Lauraceae, evidencing however, some distinctive characters that can be useful in the generic/specific delimitation.; São apresentadas as características anatômicas da madeira de Ocotea catharinensis (Lauraceae), árvore característica e exclusiva da Mata Atlântica, atualmente presente na lista de espécies brasileiras raras ou ameaçadas de extinção. Estudos desta natureza fornecem subsídios tanto para identificação taxonômica como para interpretações filogenéticas, auxiliando na resolução de problemas taxonômicos em agrupamentos botânicos complexos, avançando no estabelecimento de um sistema filogenético apropriado. O. catharinensis apresenta praticamente todas as características anatômicas descritas para a família Lauraceae...

Contribuição ao estudo morfológico e anatômico das domácias em espécies de Ocotea Aubl.(Lauraceae) da Região Sul do Brasil; Contribution to morphology and anatomy study of domatia in Ocotea Aubl. species (Lauraceae) from the South of Brazil

Santos, Marisa; Universidade Federal de Santa Catarina; Almeida, Sérgio Luiz de
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; Formato: application/pdf
Publicado em 01/01/1995 Português
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Este trabalho abrange a observação de folhas em 14 espécies de Ocotea Aubl., ocorrentes nos três Estados do Sul do Brasil (Rio Grande do Sul, Paraná e Santa Catarina), visando o estudo das domácias, quando presentes. Em 5 espécies, não foi encontrada nenhuma domácia. As características morfológicas e anatômicas das domácias em 9 espécies são apresentadas e discutidas. Quanto à estrutura externa, foram encontrados diferentes tipos de domácias, mas na maioria dos casos verificou-se que não são exclusivos de uma espécie. Entretanto, os aspectos da estrutura externa, reunidos com os da estrutura interna, podem contribuir para o reconhecimento destas espécies.; This paper includes the observation of leaves in 14 Ocolea Aubl. species, occurring in three States in the South of Brazil (Rio Grande do Sul, Paraná and Santa Catarina), in order to the study domatia, when these are present. In 5 species, there aren't any domatia. The morphology and anatomy aspects of domatia in 9 species are showed and discussed. With regard to outside structure, it was found distinct domatia pattern, but in the majority of the cases it exclusive for one species. However, aspects of the outside structure, together with aspects of the inside structure may contribute to the recognition ofthese species.

Anatomia da madeira e da casca de Miconia cabucu Hoehne (Melastomataceae); Bark and wood anatomy of Miconia cabucu Hoehne (Melastomataceae)

Medeiros, João de Deus; Universidade Federal de Santa Catarina; Morretes, Berta Lange DE; Universidade de São Paulo
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; Formato: application/pdf
Publicado em 01/01/1994 Português
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No presente trabalho a estrutura da casca e anatomia da madeira de Miconia cabucu são descritas em detalhes. O estudo da estrutura da casca revela algumas características de valor taxonômico, como a presença de cristais solitários e células de esclerênquima que ocorrem isoladas ou agrupadas, a variabilidade no comprimento das fibras, a formação de delicadas fissuras longitudinais, e a reduzida felodenne. Uma comparação entre M. cabucu e duas espécies de Mouriri mostra uma similaridade nestas características. A estrutura anatômica da madeira de M. cabucu é bastante similar à de outros membros de Miconia, e corrobora a posição de Melastomatoideae como um grupo bastante homogêneo. A principal distinção na estrutura da madeira de M. cabucu é representada pela presença de espessamentos espiralados nas paredes internas dos vasos. As relações entre estrutura anatômica de casca e madeira e o ambiente explorado pela espécie são discutidas.; The wood anatomy and bark structure of Miconia cabucu is described in detail. The study of the bark structure reveals some characteristics of taxonomic value, such as the presence of solitaJy crysta1s, and the sclerenchyma cells that occur either isolated or are grouped, the variable fiber length...

Anatomia foliar de Spartina Schreber (Poaceae) da Ilha de Santa Catarina (Florianópolis, SC); Leaf anatomy of Spartina Schreber (Poaceae) from Santa Catarina Island (Florianópolis, SC)

Santos, Marisa; Universidade Federal de Santa Catarina, Florianópolis; Almeida, Sérgio Luiz de; Universidade Federal de Santa Catarina, Florianópolis
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; Formato: application/pdf
Publicado em 01/01/2000 Português
Relevância na Pesquisa
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As características estruturais da folha de Spartina alterniflora Loisel.-Desl., S. densiflora Brongn. e S.ciliata Brongn., da Ilha de Santa Catarina (Florianópolis,SC) podem contribuir para identificação taxonômica das espécies. Foi estudada a morfologia e anatomia da lâmina e bainha foliar das três espécies. Entre as características distintas para as espécies estão: as saliências (zonas costais) e reentrâncias (zonas intercostais) da face adaxial da lâmina foliar; as projeções epicuticulares e tricomas unicelulares na face adaxial da lâmina foliar; a distribuição das fibras esclerenquimáticas ao longo da folha (lâmina e bainha); e a disposição da bainha parenquimática do tipo Kranz. Na lâmina foliar ocorre parênquima paliçádico radiado. As lacunas aeríferas nas espécies de manguezal (S.alterniflora e S.densiflora) são mais desenvolvidas que na espécie de restinga (S.ciliata). Nas 3 espécies a epiderme é constituída por: células epidérmicas curtas (silicosas) e longas; células buliformes; estômatos do tipo gramíneo; glândulas de sal (bicelulares); cutícula espessa.; The structural characteristics of the leaf of Spartina alternijlora Loisel.Desl., S. densiflora Brongn. and S.cifiata Brongn....