Drought Tolerance Gene Expression

Genes Function Mutants Function PP2C/ ABI1 negative regulator of ABA signaling abi1-2 / abi1-3 enhanced response to ABA/ limited effect on drought avoidance PP2C/ ABI2 negative regulator of ABA signaling PP2CA negative regulator of ABA signaling hab1-1 ABA hypersensitive inhibition of seed germination/ enhanced ABA-mediated stomatal closure PP2C/ HAB1 negative regulator of ABA signaling/ strongly induced by ABA hab1-1 abi1-2/ hab1-1 abi1-3 strongly increased response to ABA/ stomatal closure/ reduced transcriptional water loss/ reduced water consumption ABA response to drought/ salt/ cold stress/ stomatal closure/ changes of ion fluxes and osmoregulation/ affects more than 1000 gene expression under stress ABA-deficient/ ABA/insensitive wilty phenotype FCA RNA-binding protein: ABA-binding receptor/ flowering control fca-1 no affect on seed germination/ stomatal response RPK1 plasma membrane receptor/ ABA signaling era1/ abh1/fry1/ hab1/sad1/gcr1 ABA hypersensitive Ca++ ABA signal transduction abi1-1/ abi1-1 R1 to R7 enhanced response to ABA cyclic ADP-ribose ABA signal transduction ScaBP5 (SOS3-like calcium binding protein 5) mutant hypersensitive to ABA reactive oxygen ABA signal transduction PKS3 (protein kinase 3) mutant hypersensitive to ABA nitric oxide ABA signal transduction rbohD/F reduced ABA sensitivity phosphoinositide ABA signal transduction rpk1 reduced ABA sensitivity phosphatidic acid ABA signal transduction rcn1 reduced ABA sensitivity sphingosine 1-phosphate ABA signal transduction ost1 reduced ABA sensitivity ABI5/ ABF/AREB/AtBZIP transcription factors/ ABA responsive element-binding proteins abi5 reduced ABA sensitivity ABI3/ VP1/ B3 transcription factors/ domain proteins/ ABA signaling abi3 reduced ABA sensitivity ABI4/AP2/ MYC/ MYB/ HD/ZIP transcription factors/ domain proteins/ ABA signaling abi4 reduced ABA sensitivity