文献类型： 外文期刊
作者： Yang Yi 1 ; Zhao Yang 1 ; Zhu GuoLi 1 ;
作者机构： 1.China Agr Univ, Coll Biol Sci, State Key Lab Plant Physiol & Biochem, Beijing 100193, Peoples R China
2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Key Lab Monitoring & Control Trop Agr & Forest In, Minist Agr,Hainan Key Lab Monitoring & Control Tr, Danzhou 571737, Peoples R China
关键词： volumetric elastic modulus;guard cell wall;cell pressure probe;pH;stomatal movement
期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）
ISSN： 1001-6538
年卷期： 2011 年 56 卷 33 期
页码：
收录情况： SCI
摘要： Guard cell wall properties are important in stomatal movement. Previous research focused on the structure and anatomy of guard cell walls, but little is known about the physical changes that take place within the walls during stomatal opening and closure. In this work, we investigate the volumetric elastic modulus (E >) of the guard cell wall at different pH values during stomatal opening in Vicia faba epidermal strips using a cell pressure probe. The volumetric elastic modulus of the guard cell wall decreased from 7.098 to 5.690 MPa when the pH of the cell wall decreased from 8.60 to 6.50. It is easier for guard cells to change their volume at a lower volumetric elastic modulus during stomatal movement. The results are suggestive of a putative role for pH in the regulation of stomatal movement.
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