Modulation of abscisic acid signal transduction in plants

摘要

A method of modulating abscisic acid signal transduction in a plant, comprising introducing into the plant an expression cassette comprising a promoter operably linked to an ABH1 polynucleotide sequence in the sense or antisense orientation wherein the ABH1 polynucleotide sequence (a) comprises a sequence at least 70% identical to SEQ ID NO: 1 or (b) that encodes an ABH1 polypeptide having a sequence at least about 70% identical to SEQ ID NO: 2 (a nuclear cap binding protein CBP80); an expression cassette comprising said sequence and a transgenic plant transformed with said expression cassette wherein the plant has enhanced drought tolerance and/or decreased expression of ABH1.