JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2018, Vol. 53 ›› Issue (7): 1-6.doi: 10.6040/j.issn.1671-9352.0.2018.054

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Mitochondrial pyruvate carrier3 mediates abscisic acid-regulated stomatal closure and the drought response

SHEN Jian-lin, CHEN Dong-hua*   

  1. School of Life Science, Shandong University, Jinan 250100, Shandong, China
  • Received:2018-01-31 Online:2018-07-20 Published:2018-07-03

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Abstract: Terrestrial plants have developed diverse mechanisms to save water especially in response to drought, and abscisic acid(ABA)is an essential phytohormone which could be induced by drought and promote stomatal closing to prohibit water loss as transpiration. Pyruvate is the product of glycolysis generated in cytosol, and could be transported by mitochondrial pyruvate carriers(MPCs)into mitochondrion for consequent cellular metabolism. The previous studies have shown that MPCs were involved in plant drought response. In the current study, we found that the functional null mutant of AtMPC3 was hypersensitive to ABA-induced stomatal closing to reduce water loss, and thus to facilitate the plant to survive the water deficiency. Our findings revealed the essential roles of AtMPC3 in ABA-promoted stomatal closing and plant drought resistance. These findings provide theoretical guidance to develop water-use-efficiency and high-yield modern agriculture.

Key words: abscisic acid, stomatal movement, AtMPC3, drought stress, pyruvate

CLC Number: 

  • Q256
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