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PMID:19433491

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Citation

Islam, MM, Tani, C, Watanabe-Sugimoto, M, Uraji, M, Jahan, MS, Masuda, C, Nakamura, Y, Mori, IC and Murata, Y (2009) Myrosinases, TGG1 and TGG2, redundantly function in ABA and MeJA signaling in Arabidopsis guard cells. Plant Cell Physiol. 50:1171-5

Abstract

Thioglucoside glucohydrolase (myrosinase), TGG1, is a strikingly abundant protein in Arabidopsis guard cells. We investigated responses of tgg1-3, tgg2-1 and tgg1-3 tgg2-1 mutants to abscisic acid (ABA) and methyl jasmonate (MeJA) to clarify whether two myrosinases, TGG1 and TGG2, function during stomatal closure. ABA, MeJA and H(2)O(2) induced stomatal closure in wild type, tgg1-3 and tgg2-1, but failed to induce stomatal closure in tgg1-3 tgg2-1. All mutants and wild type showed Ca(2+)-induced stomatal closure and ABA-induced reactive oxygen species (ROS)production. A model is discussed in which two myrosinases redundantly function downstream of ROS production and upstream of cytosolic Ca(2+) elevation in ABA and MeJA signaling in guard cells.

Links

PubMed Online version:10.1093/pcp/pcp066

Keywords

Abscisic Acid/metabolism; Acetic Acids/metabolism; Arabidopsis/enzymology; Arabidopsis/genetics; Arabidopsis Proteins/genetics; Arabidopsis Proteins/metabolism; Calcium/metabolism; Cyclopentanes/metabolism; Glycoside Hydrolases/genetics; Glycoside Hydrolases/metabolism; Hydrogen Peroxide/metabolism; Mutation; Oxylipins/metabolism; Plant Growth Regulators/metabolism; Plant Stomata/physiology; Signal Transduction

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

ARATH:BGL38

involved_in

GO:0010119: regulation of stomatal movement

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:BGL38

involved_in

GO:0009737: response to abscisic acid

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:BGL37

involved_in

GO:0010119: regulation of stomatal movement

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:BGL37

involved_in

GO:0009737: response to abscisic acid

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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