Data/hora: 11/06/2024 06:49:12

Provedor de dados: | 39
País: | Brazil
Título: | Maternal habitat affects germination requirements of Anabasis setifera, a succulent shrub of the Arabian deserts
Autores: | El-Keblawy,Ali; Gairola,Sanjay; Bhatt,Arvind.
Data: | 2016-03-01
Ano: | 2016
Palavras-chave: | Anabasis setifera; Desert; Halophyte; Maternal habitat; Seed germination.
Resumo: | The effects of maternal habitat on light and temperature requirements during germination were assessed for the succulent desert shrub Anabasis setifera. Seeds were collected from the Mediterranean habitats of Egypt and the hyper-arid subtropical habitats of the United Arab Emirates (UAE). Seeds from the two populations were germinated in three temperature treatments in both a light/dark regime and continuous darkness. Seeds from the Egyptian population germinated significantly greater and faster than those of UAE. Seeds stored for four months at room temperatures have little dormancy and germinate at wide range of temperatures and light conditions, but seeds stored four months in the natural habitat lost their ability to germinate and rotted 10 days after incubation. The germination response to temperature depended on the habitat type. Seeds of the Egyptian population attained a significantly greater germination at lower temperatures, compared with seeds from the UAE population, but there was no difference in germination between the two populations at higher temperatures. Germination of A. setifera was very fast; most seeds germinated within four days. These results reflect the adaptive strategy of germination in both populations, and may help explain the wide distribution of this species in different climatic regions.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100035
Editor: | Sociedade Botânica do Brasil
Relação: | 10.1590/0102-33062015abb0212
Formato: | text/html
Fonte: | Acta Botanica Brasilica  v.30 n.1 2016
Fonte: | info:eu-repo/semantics/openAccess