- Cell signaling under salt, water and cold
stresses.
Zhu JK.
Department of Plant Sciences, University of Arizona, Tucson, Arizona
85721, USA. jkzhu@ag.arizona.edu
Forward genetics and biochemical approaches to studying plant responses
to salt, water and cold stresses began to bear fruit recently. Analysis
of salt overly sensitive (sos) Arabidopsis mutants revealed a novel
calcium-regulated protein kinase pathway for response to the ionic
aspect of salt stress. In-gel kinase assays identified several
SOS-independent protein kinases that are either activated specifically
by osmotic stress or by multiple abiotic and biotic stresses. Molecular
analysis revealed a transcriptional cascade in cold-regulated gene
expression.
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