Data/hora: 12/06/2024 05:25:43

Provedor de dados: | 53
País: | Brazil
Título: | Ecophysiological leaf traits of native and exotic palm tree species under semi-arid conditions
Autores: | Oliveira,Deborah; Medeiros,Maria; Pereira,Silvia; Oliveira,Marciel; Frosi,Gabriella; Arruda,Emília; Santos,Mauro.
Data: | 2016-06-01
Ano: | 2016
Palavras-chave: | Acrocomia aculeata; Evergreen species; Gas exchange; Syagrus coronata; Water deficit.
Resumo: | ABSTRACT The main goal of this study was to evaluate the performance of two palm species under semi-arid conditions during the rainy and dry periods: the semi-arid native Syagrus coronata and a native to tropical America, Acrocomia aculeata. The leaf water potential, gas exchange, leaf soluble sugars, starch, free amino acids, total soluble protein content and morphological traits were measured. The highest leaf water potential and CO2 assimilation values in both species were achieved during the rainy period. In response to the low soil moisture content during the dry period, gas exchange decreased 72 and 92% in S. coronata and A. aculeata, respectively, when compared with values from rainy period. As evergreen plants, both species maintained intact leaf photosynthetic pigment contents during the rainy and dry periods. Other important traits for drought tolerance are larger adaxial surface hypoderm and cuticle found in both species with higher stomatal density on the abaxial leaf surface. When comparing the species, S. coronata exhibited lower sensitivity to low water availability, showing higher CO2assimilation and water use efficiency.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200128
Editor: | Instituto Agronômico de Campinas
Relação: | 10.1590/1678-4499.364
Formato: | text/html
Fonte: | Bragantia  v.75 n.2 2016
Fonte: | info:eu-repo/semantics/openAccess