河北省农林科学院机构知识库

The dynamic changing of Ca2+ cellular localization in maize leaflets under drought stress

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文献类型：外文期刊

作者： Ma Yuan-yuan ⁶ ; Song Wei-yi ⁷ ; Liu Zi-hui ² ; Zhang Hong-mei ² ; Guo Xiu-lin ² ; Shao Hong-bo ¹ ; Ni Fu-tai ⁸ ;

作者机构： 1.QUST, Inst Life Sci, Qingdao 266042, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Inst Genet & Physiol, Shijiazhuang 050051, Peoples R China

3.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming, Yangling 712100, Peoples R China

4.Water Resources Minist, Yangling 712100, Peoples R China

5.Binzhou Univ, Binzhou 256603, Peoples R China

6.China Agr Univ, Coll Food Sci & Nutr Engn, Beijing 100083, Peoples R China

7.Shangqiu Normal Univ, Dept Biol, Shangqiu 476000, Peoples R China

8.Jilin Normal Univ, Coll Life Sci, Siping 136000, Peoples R China

关键词： Osmotic stress;Maize;Ca2+ localization;Cell super-microstructure;Biomembrane;Signal

期刊名称：COMPTES RENDUS BIOLOGIES （影响因子：1.583；五年影响因子：2.123 ）

ISSN： 1631-0691

年卷期： 2009 年 332 卷 4 期

页码：

收录情况： SCI

摘要： Maize cultivar zhengdan958 was selected as materials. The sub-cellular distribution of soluble calcium at different phases was shown by the potassium-pyroantinonate-precipitation method and transmission electron microscopy. The results showed that the deposits of calcium antimonate as the indicator for Ca2+ localization were mainly concentrated within the vacuoles and intercellular spaces without PEG treatment. Firstly, when the leaf was treated with PEG, the Ca2+ level increased remarkably in the cytoplasm, but considerably decreased in vacuoles and intercellular gaps. Meanwhile, the level of Ca2+ also increased in chloroplast and nucleus. When the treatment continued, the level of Ca2+ in chloroplasts and nucleus continued to increase and some cells and chloroplasts finally disintegrated, showing that there is a relationship between the distribution of Ca2+ and the super-microstructure of cells. Ca2+ plays a role in the plant drought resistance. The changes of cytosolic Ca2+ localization in cells treated by ABA, EGTA, Verapamit and TFP were investigated too. The increase of cytosolic calcium induced by ABA was mainly caused by calcium influx. Calmodulin participated in ABA signal transduction, which was indicated by the variation of cytosolic Ca2+/CaM concentration change induced by ABA. The above results provided a direct evidence for calcium ion as an important signal at the experimental cellular level. To cite this article: Y. Y Ma et al., C R. Biologies 332 (2009). (C) 2008 Academic des sciences. Published by Elsevier Masson SAS. All rights reserved.

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The dynamic changing of Ca2+ cellular localization in maize leaflets under drought stress

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