Results 21 to 30 of about 229,797 (353)

Verhuellia is a segregate lineage in Piperaceae: more evidence from flower, fruit and pollen morphology, anatomy and development [PDF]

open access: yes, 2010
Background and Aims The perianthless Piperales, i.e. Saururaceae and Piperaceae, have simple reduced flowers strikingly different from the other families of the order (e.g. Aristolochiaceae).
Goetghebeur, Paul   +7 more
core   +3 more sources

Alterações morfofisiolócias de plantas de abacaxizeiro influenciadas por diferentes substratos durante o processo de aclimatização Morphophysiological changes of pineapple plants influenced by different substrates during the process of acclimatization

open access: yesCiência e Agrotecnologia, 2011
Objetivou-se determinar um substrato adequado para aclimatização de plantas micropropagadas de abacaxizeiro 'Gomo de Mel' e a sua caracterização anatômica, durante este processo. O enraizamento dos brotos foi realizado em meio MS acrescido de 30 g L-1 de
Francyane Tavares Braga   +5 more
doaj   +1 more source

Danos visuais e anatômicos causados pelo glyphosate em folhas de Eucalyptus grandis Visible and anatomic damages caused by glyphosate in Eucalyptus grandis leaves

open access: yesPlanta Daninha, 2008
A sintomatologia é um dos principais critérios adotados para avaliar os danos causados por fatores bióticos e abióticos em plantas. Contudo, aspectos microscópicos são necessários na compreensão dos mecanismos de intoxicação e no diagnóstico precoce da ...
L.D. Tuffi Santos   +6 more
doaj   +1 more source

Conifer-angiosperm interactions: Physiological ecology and life history. [PDF]

open access: yes, 2011
Worldwide, conifers are most successful on sites subject to chronic stresses that limit productivity (low temperatures, nutrient poverty, poor drainage).
Lusk, Christopher H.
core   +2 more sources

How to construct and use a simple device to prevent the formation of precipitates when using Sudan Black B for histology

open access: yesActa Botânica Brasílica, 2015
The present work aims to demonstrate the stages of fabrication and use of a simple device to avoid the formation or fixation of precipitates from Sudan Black B solution on tissues.
João Marcelo Santos de Oliveira
doaj   +1 more source

Chemical Structure and Localization of Levan, the Predominant Fructan Type in Underground Systems of Gomphrena marginata (Amaranthaceae)

open access: yesFrontiers in Plant Science, 2018
Gomphrena marginata Seub. (Amaranthaceae) is an endemic species from Brazilian campos rupestres with a fructan accumulating underground reserve system.
Emanuela O. Joaquim   +8 more
doaj   +1 more source

A new record of fossil wood of Vochysiaceae from the Upper Pleistocene (Arroyo Feliciano Formation), Argentina, South America [PDF]

open access: yes, 2015
A new species of Qualeoxylon Suguio & Mussa is described from the Late Pleistocene Arroyo Feliciano Formation of the Gualeguay Basin on eastern Argentina.
Brea, Mariana, Moya, Eliana Vanesa
core   +1 more source

Modularization for the Cell Ontology [PDF]

open access: yes, 2011
One of the premises of the OBO Foundry is that development of an orthogonal set of ontologies will increase domain expert contributions and logical interoperability, and decrease maintenance workload. For these reasons, the Cell Ontology (CL) is being re-
Alexander D. Diehl   +7 more
core   +2 more sources

Croceous glands in Polygala adenophora (Polygalaceae): structure, histochemical, and functional aspects [PDF]

open access: yesActa Amazonica
Croceous glands are visible structures defined by their rounded shape and yellowish color. They have great taxonomic importance, being used to delimit the Timutua section, one of the 14 sections of the subgenera Polygala, genera Polygala, the most ...
Augusto César da Silva JORGE   +3 more
doaj   +1 more source

The taxonomic value of leaf anatomy for species Byrsonima: a difficult genus of Malpighiaceae Juss. [PDF]

open access: yesActa Botânica Brasílica, 2020
We studied the leaf anatomy of 15 species of Byrsonima and a single species of Diacidia as an outgroup to test the relevance of leaf anatomical characters to the complicated taxonomy of this genus. We present complete anatomical descriptions for petioles
João Victor da Costa Santos   +4 more
doaj   +1 more source

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