8 documents found, page 1 of 1

Polyploidy and polyembryony in Anemopaegma (Bignonieae, Bignoniaceae)

Polyploidy is a key process in plant evolution, with the asexual formation of embryos representing a way through which polyploids can escape sterility. The association between polyploidy and polyembryony is known to occur in Bignoniaceae. In this study, we investigate polyembryony in four polyploid species of Anemopaegma: A. acutifolium, A. arvense, A. glaucum and A. scabriusculum as well as in one diploid spec...

Evidence of altitudinal gradient modifying genomic and chemical diversity in po...

Made available in DSpace on 2022-04-29T08:32:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-12-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); ASCRS Research Foundation; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Lychnophora pinaster Mart. (Asteraceae) is endemic to the Brazilian Cerrado. It is distributed along the altitudinal gradient of the mount...

The reproductive biology of Cybistax antisyphilitica (Bignoniaceae), a characte...

Bignoniaceous woody species are very important ecological components of neotropical forests, but the reproductive biology of many species, such as Cybistax antisyphilitica, remains virtually unknown. Most species of Bignoniaceae are characteristically self-sterile, despite typically exhibiting normal pollen tube growth throughout the style, combined with slow rates of ovule penetration, fertilisation and endosp...

As arnicas endêmicas das serras do Brasil - uma visão sobre a biologia e a quím...

Polyploidy and polyembryony in Anemopaegma (Bignonieae, Bignoniaceae)

Tree mortality in a riparian forest at Rio Paraguai, Pantanal, Brazil, after an...

Foi realizado um estudo numa mata ripária (rio Paraguai, Brasil) para verificar a mortalidade da vegetação após uma cheia excepcional, em 1995. Indivíduos com diâmetro a altura do peito > 5cm foram marcados em 108 parcelas (10×10m) em 1994 e reamostrados em 1996. A taxa de mortalidade total foi de 4,1%. A mortalidade aumentou nas faixas topográficas mais altas, ao nível de comunidade, indicando que lugares onde...

The effect of ants on the seed dispersal cycle of the typical myrmecochorous Ri...

Estudos cromossômicos em espécies do complexo Anemopaegma arvense (Bignoniaceae...