Results 81 to 90 of about 1,802 (206)

El origen y diversificación del crecimiento cambial atípico en plantas fósiles: procesos del desarrollo involucrado

open access: yesBoletín de la Sociedad Argentina de Botánica, 2012
En el registro fósil encontramos una serie de morfologías, cuyo origen sólo puede ser inferido a partir de los estudios ontogenéticos. De este modo, la comprensión de los procesos del desarrollo en plantas y el patrón resultante es de suma importancia en
Josefina Bodnar, Eliana Paula Coturel
doaj  

Revisión de la paleoflora de la Formación Nestares (Jurásico temprano), provincia del Neuquén y Río Negro, Argentina [PDF]

open access: yes, 2013
Fil: Morel, Eduardo Manuel. División Paleobotánica. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La PlataFil: Ganuza, Daniel Gustavo. División Paleobotánica. Facultad de Ciencias Naturales y Museo.
Artabe, Analía Emilia Eva   +3 more
core  

Extrapolating demography with climate, proximity and phylogeny: approach with caution [PDF]

open access: yes, 2016
Plant population responses are key to understanding the effects of threats such as climate change and invasions. However, we lack demographic data for most species, and the data we have are often geographically aggregated.
Buckley, Y.M.   +3 more
core   +4 more sources

Distribution and DNA profiling of Cycas beddomei Dyer. : A critical endangered gymnosperm.

open access: yesAgricultura, 2014
Cycas beddomei is a   critically endangered  plant species belonging to the cycadales of the  gymnosperm under family Cycadaceae grown in the hill slopes and grassy woodland forest.  It is considered as a living fossil, as its distribution is very ...
Gyana Ranjan Rout
doaj   +1 more source

Comparative anatomy of leaflets of Zamia acuminata and Z. pseudomonticola (Zamiaceae) in Costa Rica

open access: yesRevista de Biología Tropical, 2013
The genus Zamia is morphologically and ecologically the most diverse of the order Cycadales. Throughout its history this genus has been restricted to the New World and is presently almost entirely restricted to the Neotropics.
Rafael Acuña-Castillo   +1 more
doaj   +2 more sources

Impact of Late Pleistocene-Holocene climatic fluctuations on the phylogeographic structure and historical demographics of Zamia prasina (Cycadales: Zamiaceae)

open access: yesBotan‪ical Sciences, 2019
Background: Glacial periods during the Pleistocene have been hypothesized to have greatly influenced geographical patterns of genetic structure and demography of many tropical species.
Grecia Montalvo-Fernández   +7 more
doaj   +1 more source

A genetic method for diagnosing lantana poisoning using a barcoding-based, genusspecific, polymerase chain reaction [PDF]

open access: yes, 2014
INTRODUCCIÓN: Las especies de Lantana son altamente tóxicas, ya que contienen lantadenos y otros compuestos químicos. Aunque ocasionalmente se han reportado envenenamientos en humanos, el ganado en todo el mundo a menudo es vícitima de intoxicaciones ...
Francés Bozal, Francesc
core  

Palaeoecology of the Cenomanian amber forest of Sarthe (western France) [PDF]

open access: yes, 2013
Cretaceous ambers have been discovered in France since the beginning of the 18th century. The best known are those from south-western France which are Late Albian-Early Cenomanian in age, but there are other important amber deposits in other regions ...
Breton, G.   +3 more
core   +5 more sources

Plant macrofossils and Biostratigraphy of the Calshaneh section, NW Tabas and its palaeoclimate analysis [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2016
Jurassic deposits are well exposed in the Calshaneh area, north western of the Tabas city, Central-East Iran. It contains plant macrofossils belonging to seventeen species allocated to eleven genera of various orders such as of Equisetales, Filicales ...
Fatemeh Vaez-Javadi
doaj  

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