Results 121 to 130 of about 7,626 (263)

Número cromossômico em acessos de Pennisetum spp. (Poaceae, Poales) = Chromosome number in Pennisetum spp. accessions (Poaceae, Poales)

open access: yesActa Scientiarum: Biological Sciences, 2008
Avaliou-se o complemento cromossômico de 16 acessos de Pennisetum disponíveis na Coleção de Germoplasma da Embrapa Gado de Leite – Juiz de Fora, Estado de Minas Gerais.
Vânia Helena Techio   +3 more
doaj  

Nomenclatural correction in Cryptanthus Otto & A. Dietrich. (Bromeliaceae - Bromelioideae)

open access: yesRodriguésia
Nomenclatural correction in Cryptanthus Otto & A. Dietrich. (Bromeliaceae - Bromelioideae). A nomenclatural correction of the author name of Cryptanthus zonatus, an endemic species of Northeastern Brazil, is provided.
Marccus Alves, Rossella Marcucci
doaj   +1 more source

Predictions for Weed Resistance to Herbicides in Brazil: A Botanical Approach [PDF]

open access: yes, 2017
The intensive use of herbicides in agriculture has led to the appearance of resistant weed biotypes. Resistance is the inherited ability of a plant to survive following application of an herbicide dose which should be lethal.
Agostinetto, Dirceu   +7 more
core   +3 more sources

Uneven rate of plant turnover along elevation in grasslands [PDF]

open access: yes, 2017
Plant taxonomic and phylogenetic composition of assemblages are known to shift along environmental gradients, but whether the rate of species turnover is regular or not (e.g., accelerations in particular sections of the gradient) remains poorly ...
Descombes, P.   +3 more
core   +1 more source

Synopsis of Cyperaceae in the grasslands of Guartelá State Park, Paraná, Brazil

open access: yesRodriguésia, 2019
Cyperaceae is the third largest family among the monocotyledons and is highly represented in grassland environments. The aim of the present study was to conduct a floristic inventory of Cyperaceae in the grasslands of Guartelá State Park (GSP) and to ...
Tainã de Souza   +3 more
doaj   +1 more source

Temporal dynamics of aquatic communities and implications for pond conservation [PDF]

open access: yes, 2012
Conservation through the protection of particular habitats is predicated on the assumption that the conservation value of those habitats is stable. We test this assumption for ponds by investigating temporal variation in macroinvertebrate and macrophyte ...
Andrew Hull   +39 more
core   +1 more source

Revisiting Mayacaceae Kunth towards to future perspectives in the family

open access: yesRodriguésia
Mayacaceae Kunth is an aquatic plant family that currently comprises a single genus, and four to six accepted species. Most of them are widely distributed in the Neotropics, with the exception of Mayaca baumii Gürke, which is endemic to Africa.
Maria Luiza Silveira de Carvalho   +1 more
doaj   +1 more source

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