Phosphatidylinositol 3-phosphate is required for abscisic acid-induced hydrogen peroxide production in rice leaves
Resource
Plant Growth Regulation 45 (2): 95-101
Journal
Plant Growth Regulation
Pages
95-101
Date Issued
2005
Date
2005
Author(s)
Hung, Kuo Tung
Kao, Ching Huei
Abstract
Rice leaves produce H2O2 in response to abscisic acid (ABA), which results in induction of senescence and accumulation of NH 4+. The upstream steps of the ABA-induced H 2O2 production pathway in rice leaves remain largely unclear. In animal cells, H2O2 production in neutrophils is activated by phosphatidylinositol 3-phosphate (PI3P), a product of phosphatidylinositol 3-knase (PI3K). In the present study, we examined whether PI3P plays a role in H2O2 production in rice leaves exposed to ABA. We found that PI3K inhibitors LY 294002 (LY) or wortmannin (WM) inhibited ABA-induced H2O2 production, senescence and NH4+ accumulation. Hydrogen peroxide almost completely rescued the inhibitory effect of LY or WM. It appears that PI3P plays a role in ABA-induced H2O2 production, senescence, and NH 4+ accumulation in rice leaves. © Springer 2005.
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Type
journal article
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