Potential for seed bank formation of two weed species from Brazilian Amazonia


Autoria(s): Dias-Filho,Moacyr B.
Data(s)

01/08/1999

Resumo

The potential for seed bank formation of two perennial weed species, Ipomoea asarifolia (Desr.) Roem. & Schult. (Convolvulaceae) and Stachytarpheta cayennensis (Rich.) M. Vahl (Verbenaceae), both common in Amazonia , was evaluated in a degraded pasture area in eastern Brazilian Amazonia . Seeds were enclosed in nylon mesh packets and placed at the soil surface or buried at 5 or 10 cm deep. The number of viable seeds was recorded at 6, 10, 14 and 18 months after burial. Results showed that S. cayennensis has the ability to form persistent soil seed bank, while I. asarifolia seeds do not build up in the soil seed bank. For S. cayennensis and, to some extent, for I. asarifolia, seed survival was highest at greater burial depths.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581999000200002

Idioma(s)

en

Publicador

Sociedade Brasileira da Ciência das Plantas Daninhas

Fonte

Planta Daninha v.17 n.2 1999

Palavras-Chave #Brazil #seed #longevity #Stachytarpheta cayennensis #Ipomoea asarifolia
Tipo

journal article