[Molecular response of plant to drought stress].
Drought stress is a bottleneck factor for plant growth and development. Synthesis and accumulation of osmoprotectants, up-regulation of gene expression implicated in repair of desiccation injury, free radical-scavenging enzymes and late-embryogenesis-abundant(LEA) protein could increase the drought tolerance of plant. There are at least for pathways of signal transduction in plant subjected to drought stress, two are abscisic acid(ABA)-dependent, and two are ABA-independent. In the signal transduction of plants encountered drought stress, two-component His protein kinase could act as an osmosensor, and Ca2+ and inositol triphosphate(IP3) could be the second messenger for dehydration signaling. Transgenic plant is an excellent system in evaluating function of encoded protein.
Song
Songquan
S
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menla 666303. sgsong@xtbg.org.cn
Wang
Yanrong
Y
D000040:Abscisic Acid / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D004190:Disasters; D015870:Gene Expression; D010940:Plant Proteins / Q000378:metabolism; D010944:Plants / Q000378:metabolism*; D030821:Plants, Genetically Modified / Q000502:physiology; D015398:Signal Transduction / Q000502:physiology*
D010940:Plant Proteins; C066246:late embryogenesis abundant protein, plant; D000040:Abscisic Acid; D002118:Calcium