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兰州大学机构库  > 草地农业科技学院  > 期刊论文
题名: Effects of heavy metals on stomatal movements in broad bean leaves
作者: Yang, HM(杨惠敏); Zhang, XY; Wang, GX
收录类别: SCIE
出版日期: 2004-07-08
刊名: RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
卷号: 51, 期号:4, 页码:464-468
出版者: MAIK NAUKA/INTERPERIODICA
出版地: NEW YORK
英文摘要: How do heavy metals affect stomatal movements and whether water channels are involved in stomatal movements was investigated in broad bean (Vicia faba L.) leaves. Three-week old fully expanded leaves were harvested. Leaf epidermis was peeled off and soaked in the Mes-KOH buffer containing the salts of heavy metals. Stomatal aperture was measured under the microscope. The tested heavy metal ions, such as Hg2+, Pb2+, Zn2+, and La3+, partly inhibited stomatal opening in light or closing in darkness at submillimolar concentrations, while K+, Na+ and Mg2+ had no visible effects on stomatal movements. As compared to La3+, Hg2+ affected stomatal movements more significantly. Stomatal movements were almost completely inhibited under a combined Hg2+ and La3+ treatment. Apparently, La3+, a Ca2+ channel blocker, inhibits the changes in the cytosolic Ca2+ concentration in guard cells, thus affecting stomatal movements. The inhibitory effect of Hg2+ on stomatal movements may be explained by the inhibition of water channels. Like Hg2+, Zn interfered with stomatal movements. It is concluded that heavy metals at submillimolar concentrations inhibit stomatal movements. They may affect water fluxes through guard cell membranes in different ways, i.e., Hg2+, Pb2+ Zn2+ inhibit water channels, whereas La3+ block ion channels. Water channels may be involved in stomatal movements by regulating water fluxes and play a dominant and primary role in stomatal movements.
关键词: Vicia faba ; heavy metals ; water channels ; ion channels ; stomatal movements
作者部门: Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730000, Peoples R China ; Lanzhou Univ, Key Lab Arid & Grassland Agroecol, Minist Educ, Lanzhou 730000, Peoples R China ; Zhejiang Univ, Coll Life Sci, Hangzhou 310027, Peoples R China
通讯作者: Yang, HM (reprint author), Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730000, Peoples R China.
学科分类: Plant Sciences
文章类型: Article
语种: 英语
DOI: 10.1023/B:RUPP.0000035737.29487.dc
ISSN号: 1021-4437
WOS记录号: WOS:000223364700005
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/113528
Appears in Collections:草地农业科技学院_期刊论文

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Recommended Citation:
Yang, HM,Zhang, XY,Wang, GX. Effects of heavy metals on stomatal movements in broad bean leaves[J]. RUSSIAN JOURNAL OF PLANT PHYSIOLOGY,2004,51(4):464-468.
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