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

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Abstract

Abscisic acid (ABA) stimulates stomatal closure and thus supports water conservation by plants during drought. Mass spectrometry-generated peptide sequence information was used to done a Vicia faba complementary DNA, AAPK, encoding a guard cell-specific ABA-activated serine-threonine protein kinase (AAPK). Expression in transformed guard celts 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 arrow cell-specific, targeted biotechnological manipulation of crop water status.

Original languageEnglish (US)
Pages (from-to)300-303
Number of pages4
JournalScience
Volume287
Issue number5451
DOIs
StatePublished - 2000

All Science Journal Classification (ASJC) codes

  • General

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