Water relations in physic nut according to climatic seasonality, in semiarid conditions

Pesquisa Agropecuária Brasileira

Bruno Monteiro Rodrigues¹  Gabriela Burle Arcoverde¹  Antônio Celso Dantas Antonino¹  Mauro Guida Santos¹ 

[1] ,Universidade Federal de PernambucoRecife PE ,Brazil

关键词: Jatropha curcas;    abiotic stress;    biodiesel;    stomatal conductance;    Jatropha curcas;    estresse abiótico;    biodiesel;    condutância estomática;   

DOI  :  10.1590/S0100-204X2011000900020

来源: SciELO

【 摘 要 】

The objective of this work was to determine the effect of climatic seasonality on physic nut (Jatropha curcas), in field, under semiarid climate conditions. Stomatal conductance (g s), transpiration (E), soluble leaf carbohydrates (SLC), free amino acids (FAA) and total proteins (TP) were measured in leaves, in a commercial plantation in Northeast Brazil, during the summer and autumn. Plants showed high g s and E, as well as SLC, FAA and TP contents in the summer, which gradually decreased with the lower temperatures and photosynthetically active radiation during the autumn, despite the higher water availability. Even in conditions of adequate water availability, the combination of low temperatures and reduced light drastically decreased foliar metabolism.

【 授权许可】

CC BY   
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