Das tropische Parenchym. A. Assimilationsgewebe

Meyer, Friedrich Johann Lorenz

doi:10.5962/bhl.title.20326

Cited by 6 publications

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“…2f, l) surrounding occasional stomata and cortical cells with pronounced intercellular spaces resembling palisade mesophyll, but with long axes directed distally at an angle to the surface. Similarly orientated photosynthesising cells occur in stems and needle-like leaves of certain angiosperms (Meyer 1962). Fewer intercellular spaces are seen between the elongate and overlapping inner cortical cells.…”

Section: Aglaophyton Major Edwards=rhynia Majormentioning

confidence: 91%

“…Similarly orientated cells occur in the depressed areas between the characteristic emergences of Nothia (Kerp et al 2001) and in the outer cortex of Horneophyton (Edwards et al 1998). Today, such arrangements are seen in photosynthesising tissues in linear leaves and stems of certain flowering plants (Meyer 1962). In Nothia, the outer cortical cells in the emergences themselves resemble those lining the substomatal cavities.…”

Section: Soft Tissue Preservationmentioning

confidence: 94%

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Embryophytic sporophytes in the Rhynie and Windyfield cherts

2003

TRE

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Section: Aglaophyton Major Edwards=rhynia Majormentioning

confidence: 91%

Section: Soft Tissue Preservationmentioning

confidence: 94%

Embryophytic sporophytes in the Rhynie and Windyfield cherts

2003

TRE

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“…Dentre os pesquisadores que reuniram -em obras maio res -dados sobre a anatomia foliar ou anatomia foliar ecol6gica, lembramos De Bary (1877), Solereder (1908), Goebel (1913), Haberlandt (1918), Eames e MacDaniels (1947), Metcalfe e Chalk (1950, 1979, 1983, Meyer (1962), Esau (1965Esau ( , 1977, Napp-Zinn (1973, 1974, Cutter (1978) e Fahn (1983.…”

Section: Discussaounclassified

Contribuição ao conhecimento da anatomia foliar de espécies da vegetação das dunas interioranas do Municipio de Lençois-Bahia

Morretes¹

1987

Acta Bot. Bras.

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RESUMO -Nopresente trabalho e analisada a anatomia de folhas de sol, completamente expandidas de: Leucothoe oleijollit (Cham) A.C. -Ericaceae, Palicourea marcgravii St. Hi!. -Rubiaceae e Waltheria cinerescens St. Hi!. -Sterculiaceae, provenientes de dunas interioranas. A area em questao, representa zona de transi~ao entre cerrado e floresta. Anatomicamente, as tres especies apresentam caracterfsticas xeromorfas, tais como: celulas da epiderme abaxial com paredes anticlinais retas ou levemente curvas, espessadas; tricomas tectores ou secretores; camadas subepidermicas aclorofiladas; parenquima pali~adico denso; paredes das celulas do parenquima clorofiliano com espessamentos faveolados; bainhas-de-feixe e extens6es-de-bainha parenquimaticas, esclerenquimaticas ou compreendendo os dois tecidos. Os caracteres referidos nao ocorrem simultanearnente. Palavras-chaves: Anatomia ecol6gica, anatomia foliar, folhas de sol e xeromorfismo foliar.ABSTRACT -Three inland dune species were studied in the present investigation, with regard to their leaf anatomy: Leucothoe oleijo/ia (Ericaceae), Palicourea marcgravii (Rubiaceae) and Waltheria cinerescens (Sterculiaceae). The ecological area in which these species line is considered to be a transition between cerrado and forest. Xeromorphic characters are seen in the three species such as: adaxial epidermis with anticlinal cell walls being thickened as well as even or slightly curved when this tissue is observed in surface view; stomata and trichomes of the non-glandular and glandular types -in great number; achlorophyllous subepidermal layers; compact palisade parenchym; cell walls with reticulate thickening in the chlorenchyma; bundle sheaths and bundle sheath extensions occuring in three types: sclerenchymatous, parenchymatous and partly parenchymatous. The mentioned characters do not occur simultaneously. Key·words: ecological leaf anatomy, leaf anatomy, leaf xeromorphism, sun leaf. Introdu~aoA importfmcia de estudos anatomicos de especies vegetais como um todo ou apenas uma de suas partes -que integram um ecossistema, levando-se em conia 0 efeito dos fatores luz, temperatura, umidade relativa, pluviosidade e solo e cada vez mais patente. (Morretes 1980). Napp -linn (1984) ao fazer uma cuidac'osa revisao bibliogrMica de trabalhos que levam em conta a Anatomia Ecol6gica, chama a atengao para 0 fato de que na America Tropical praticamente apenas 0 Brasil apresenta um maior numero de informagoes sobre a organizag8o estrutural de especies de alguns de seus ecossistemas, tais como: cerrado, caatinga amazonica, caatinga do nordeste, restinga e floresta pluvial. 0 referido autor lembra que e desejf:lVel a continuidade de estudos desta natureza a fim de que possa ser compreendido 0 efeito que cada um dos fatores do ambiente exerce sobre a anatomia do corpo vegetal.Em termos de Anatomia ecol6gica, praticamente nada foi realizado com a vegetag80 das dunas interioranas que ocorrem no Munidpio de Leng6is, encravado na regiao da Chapada Diamantina -Bahia.As dunas em questao representam ar...

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“…2), the physiologically important characteristics most often measured were the number and dimensions of mesophyll cells, internal leaf surface area (i.e., the surface area of mesophyll cell walls adjoining the intercellular spaces), and the proportion of intercellular spaces. In one of the first comprehensive studies of leaf mesophyll, Meyer (1923) measured the dimensions of mesophyll palisade cells -the ratio of their length to the width, variations in the length of palisade cells within a blade, the number of palisade cell layers, the angle of orientation of palisade cells to the leaf surface, and the arm palisade cells surface area. The following methods for measurement of mesophyll parameters were most frequently used: Mesophyll cell dimensions were usually measured by applying a model-based approach, i.e., assuming that the cells could be modelled by simple geometrical bodies (Maksymowych, 1963;Chonan, 1966;.…”

Section: Short History Of Quantification Of Plant Anatomical Structurementioning

confidence: 99%

Stereology, an Unbiased Methodological Approach to Study Plant Anatomy and Cytology: Past, Present and Future

Kubínová¹,

Radochová²,

Lhotáková³

et al. 2017

Image Anal Stereol

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This review presents an historical overview of stereological methods used for the quantitative evaluation of plant anatomical and cytological structures. It includes the origins of these methods up to the most recent developments such as the application of stereology based on 3D images. We focus especially on leaf, as the vast majority of studies of plant microscopic structure examine this organ. An overview of plant cell ultrastructure measurements as well as plant anatomical characteristics (e.g., plant tissue volume density, internal leaf surface area, number and mean size of mesophyll cells and chloroplast number), which were estimated by stereological methods most frequently, is presented. We emphasize the importance of proper sampling needed for unbiased measurements. Furthermore, we mention other methods used for plant morphometric studies and briefly discuss their relevance, precision, unbiasedness and efficiency in comparison with unbiased stereology. Finally, we discuss reasons for the sparse use of stereology in plant anatomy and consider the future of stereology in plant research.

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Das tropische Parenchym. A. Assimilationsgewebe

Abstract: Crambe 10 f.

Cited by 6 publications

References 0 publications

Embryophytic sporophytes in the Rhynie and Windyfield cherts

Embryophytic sporophytes in the Rhynie and Windyfield cherts

Contribuição ao conhecimento da anatomia foliar de espécies da vegetação das dunas interioranas do Municipio de Lençois-Bahia

Stereology, an Unbiased Methodological Approach to Study Plant Anatomy and Cytology: Past, Present and Future

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