Role of guard-cell chloroplasts in ABA-dependent stomatal closure

KAKEN

About This Project

Japan Grant Number
JP18K06292 (JGN)
Funding Program
Grants-in-Aid for Scientific Research
Funding Organization
Japan Society for the Promotion of Science

Kakenhi Information

Project/Area Number
18K06292
Research Category
Grant-in-Aid for Scientific Research (C)
Allocation Type
  • Multi-year Fund
Review Section / Research Field
  • Basic Section 44030:Plant molecular biology and physiology-related
Research Institution
  • Kyushu University
Project Period (FY)
2018-04-01 〜 2024-03-31
Project Status
Completed
Budget Amount*help
4,420,000 Yen (Direct Cost: 3,400,000 Yen Indirect Cost: 1,020,000 Yen)

Research Abstract

Participation of guard cell chloroplasts in ABA-induced stomatal closure has been shown in the previous report. In this study, we investigated the possible role of K+/H+ antiporter in the thylakoid membranes.We found that the mutants of kea3 lost production of reactive oxygens(ROS)in guard cells, and that the mutants did not show stomatal closure in response to ABA. Furthermore, we found that a drug nigericin, which stimulates the exchange of K+ and H+ across the thylakoid membranes, elicited both ROS production and stomatal closure. From the results, we conclude that K+/H+ antiporter(KEA3)is involved in the ABA-dependent stomatal closure.

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