期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 63, 期 3, 页码 1095-1106出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/err315
关键词
Abscisic acid signalling; Arabidopsis thaliana; light-harvesting chlorophyll a; b binding protein; reactive oxygen species; stomatal movement
资金
- National Natural Science Foundation of China [90817104, 30700053]
- Ministry of Agriculture of China [2008ZX08009-003]
The light-harvesting chlorophyll a/b binding proteins (LHCB) are perhaps the most abundant membrane proteins in nature. It is reported here that the down-regulation or disruption of any member of the LHCB family, LHCB1, LHCB2, LHCB3, LHCB4, LHCB5, or LHCB6, reduces responsiveness of stomatal movement to ABA, and therefore results in a decrease in plant tolerance to drought stress in Arabidopsis thaliana. By contrast, over-expression of a LHCB member, LHCB6, enhances stomatal sensitivity to ABA. In addition, the reactive oxygen species (ROS) homeostasis and a set of ABA-responsive genes are altered in the lhcb mutants. These data demonstrate that LHCBs play a positive role in guard cell signalling in response to ABA and suggest that they may be involved in ABA signalling partly by modulating ROS homeostasis.
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