Results 21 to 30 of about 4,229 (203)

Rediscovering two Isoetes species in the Brazilian Amazon and Cerrado after 167 years [PDF]

open access: yesPhytoKeys, 2019
Isoetes amazonica and I. gardneriana were the first two species of the genus to be collected from Brazil. Isoetes amazonica was gathered by Richard Spruce in the Amazon basin near Santarém in the state of Pará in 1850.
Jovani B. S. Pereira   +3 more
doaj   +3 more sources

Anatomical studies of Brazilian Amazonian Isoëtes species: inferences on habitat adaptation

open access: yesRodriguésia, 2023
Isoëtes is a cosmopolitan genus of aquatic lycophytes, containing more than 200 species. In Brazil, the genus comprises 29 species, with three occurring in Pará state, Amazon. Isoëtes cangae and I.
Sergio Luís Cavalheiro-Filho   +9 more
doaj   +1 more source

The genetic diversity and population structure of two endemic Amazonian quillwort (Isoetes L.) species [PDF]

open access: yesPeerJ, 2020
Background Two endemic lycophyte species Isoetes cangae and Isoetes serracarajensis have been recently described in the State of Pará in the Amazon forest located in northern Brazil. Isoetes L. has survived through three mass extinctions.
Mirella Pupo Santos   +15 more
doaj   +2 more sources

Isoetes pedersenii, a new species from Southern South America

open access: yesAnais da Academia Brasileira de Ciências, 2010
The name Isoetes pedersenii H.P. Fuchs (Lycophyta), a species known only from the Mburucuyá National Park, Corrientes, Argentina, is validated. Observations were carried out on herbarium material with stereoscopic, light and scanning electron microscopes.
Cecilia Macluf   +2 more
doaj   +1 more source

Habitat Variation in Vernal Pool Ecosystems on Both Sides of the Strait of Gibraltar [PDF]

open access: yes, 2012
We studied vernal pool (VP) ecosystems along a latitudinal gradient crossing the Strait of Gibraltar in order to determine its role in the distribution of VP plant communities.
Hikmat, Tahiri   +4 more
core   +1 more source

The southernmost distribution range of Isoetes panamensis Maxon & C.V. Morton (Lycopodiopsida, Isoetaceae) in the relicts of the Cerrado in southern Brazil [PDF]

open access: yesCheck List, 2021
Establishing the geographical distribution limits of species may provide not only data to understand their range of adaptation to conservation proposals but also records of the dynamics in the vegetation across the time.
Jovani B. S. Pereira   +2 more
doaj   +3 more sources

New insights into bryophyte arabinogalactan-proteins from a hornwort and a moss model organism. [PDF]

open access: yesPlant J
SUMMARY Two bryophyte models, the hornwort Anthoceros agrestis (Anthoceros) and the moss Physcomitrium patens (Physcomitrium), were analyzed for the presence of arabinogalactan‐proteins (AGPs), as the emergence of these signaling glycoproteins in evolution is still under debate.
Mueller KK   +4 more
europepmc   +2 more sources

Effective dispersal of fern spore and the ecological relevance of zoochory. [PDF]

open access: yesBiol Rev Camb Philos Soc
ABSTRACT The mechanisms of fern dispersal are under‐studied and there are few data to support the vectors assumed to drive patterns of sporophyte occurrence and speciation. Although wind is generally the fern spore dispersal vector described in the literature, there has always been competing evidence supporting alternate vectors.
Brock JMR.
europepmc   +2 more sources

A conspectus of and key to greek isoetes (Isoetaceae), based on a reassessment of haussknecht\u2019s gatherings of 1885 [PDF]

open access: yes, 2015
The three Isoetes species recorded from Thessalia (Thessaly) in N Greece by Haussknecht, in 1899, under the names I. setacea, I. heldreichii, and I. phrygia, were reassessed using megaspore and microspore ornamentation in addition to macromorphological ...
Greuter, W., Troia, A.
core   +1 more source

Synthesis and Biological Evaluation of Theophylline Methyl 1,3,4-Oxadiazole as Anticancer Agents [PDF]

open access: yes, 2020
A series of theophylline methyl 1,3,4-oxadiazole small molecules were obtained via cyclization of theophylline-7-acetohydrazide with different benzoic acids. The compounds (IVa-j) were synthesized and characterized by using conventional methods.
Gopinatha, Vindya K.   +4 more
core   +1 more source

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