Arabidopsis Biological Resource Center

Ploidy: 2

Phenotype: abscisic acid deficient, reduced level of endogenous ABA during various stages of plant and seed development; impaired in ABA biosynthesis, blocking the conversion of ABA-aldehyde to ABA; slightly darker green plants; increased rate of water loss (leaf transpiration), which leads to symptoms of severe wilting and withering especially under low relative humidity and water stress, wilty phenotype can be restored to normal by spraying an ABA solution to the plants; reduced growth, reduced plant size and vigor; reduced seed dormancy, fresh seeds germinate at high frequency, germinate in silique on plant at high relative humidity; decreased sensitivity to the presence of GA biosynthesis inhibitors such as paclobutrazol; reduced sensitivity to salt and osmotic stress during germination, seeds germinate and seedlings turn green on 200 mM NaCl.