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Regulation of abscisic acid-induced stomatal closure and anion channels by guard cell AAPK kinase



Regulation of abscisic acid-induced stomatal closure and anion channels by guard cell AAPK kinase



Science 287(5451): 300-303



Abscisic acid (ABA) stimulates stomatal closure and thus supports water conservation by plants during drought. Mass spectrometry-generated peptide sequence information was used to clone a Vicia faba complementary DNA, AAPK, encoding a guard cell-specific ABA-activated serine-threonine protein kinase (AAPK). Expression in transformed guard cells of AAPK altered by one amino acid (lysine 43 to alanine 43) renders stomata insensitive to ABA-induced closure by eliminating ABA activation of plasma membrane anion channels. This information should allow cell-specific, targeted biotechnological manipulation of crop water status.

Accession: 003544107

Download citation: RISBibTeXText

PMID: 10634783

DOI: 10.1126/science.287.5451.300



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