| The changes of organelle ultrastructure and Ca(2+) homeostasis in maize mesophyll cells during the process of drought-induced leaf senescence | |
| Ma, Yuan-Yuan ; Guo, Xiu-Lin ; Liu, Bin-Hui ; Liu, Zi-Hui ; Shao, Hong-Bo | |
| 发表期刊 | ELECTRONIC JOURNAL OF BIOTECHNOLOGY
 |
| 2011 | |
| 卷号 | 14期号:3页码:1-10 |
| 关键词 | Ca(2+) Homeostasis Drought Leaf Senescence Maize Organelle Ultrastructure Signal Transduction |
| 产权排序 | [Ma, YY; Guo, XL; Liu, ZH] Hebei Acad Agr & Forestry Sci, Inst Genet & Physiol, Plant Genet Engn Ctr Hebei Prov, Shijiazhuang, Peoples R China; [Ma, YY] Shijiazhuang Univ, Sch Chem Engn, Shijiazhuang, Peoples R China; [Shao, HB] Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Shandong Prov Key Lab Coastal Environm Proc, Yantai, Peoples R China; [Shao, HB] Qingdao Univ Sci & Technol, Inst Life Sci, Qingdao 266042, Peoples R China; [Liu, BH] Hebei Acad Agr & Forestry Sci, Inst Dryland Farming, Hengshui, Peoples R China |
| 通讯作者 | Guo, XL, Hebei Acad Agr & Forestry Sci, Inst Genet & Physiol, Plant Genet Engn Ctr Hebei Prov, Shijiazhuang, Peoples R China. [email protected] ; [email protected] |
| 英文摘要 | The changes of cell ultra structure as well as Ca(2+) homeostasis involved in the drought-induced maize leaf senescence was investigated. Meanwhile, many indicatives of leaf senescence including thiobarbituric acid reactive substance (MDA), electrolyte leakage (EL), and chlorophyll along with soluble proteins were also detected during the process. The Polyethylene glycol6000(PEG6000)-incubated detached leaves showed a slight increase in the MDA content and electrolyte leakage during the first 30 min of our detection, which was corresponded to an unobvious alteration of the cell ultrastructure. Other typical senescence parameters measured in whole leaf exhibited a moderate elevation as well. Thereafter, however, the EL and MDA rose to a large extent, which was correlated with a dramatic damage to the cell ultrastructure with concomitant sharp decrease in the chlorophyll and soluble proteins content. The deposits of calcium antimonite, being an indicator for Ca(2+) localization, were observed in the vacuoles as well as intercellular spaces in the leaves grown under normal condition. Nevertheless, after PEG treatment, it was revealed a distinct increment of Ca(2+) in the cytoplasm as well as chloroplasts and nuclei. Moreover, with long-lasting treatment of PEG to the detached leaves, the concentration of Ca(2+) as described above showed a continuous increment which was consist with the remarked alteration of physiological parameters and severe damage to the ultrastructure of cells, all of which indicated the leaf senescence. Such drought-induced leaf senescence might result from a loss of the cell's capability to extrude Ca(2+). All above findings give us a good insight into the important role of Ca(2+) homeostasis in the process of leaf senescence accelerated by the drought stress. |
| 资助机构 | Natural Science Foundation of Hebei Province, China[C2007000994]; National Science & Technology Supporting Project, China[2007BAD69B01]; National Natural Science Foundation of China[41001137]; Science & Technology Development Plan of Shandong Province[2010GSF10208]; Chinese Academy of Sciences (CAS)[KZCX2-YW-JC203, 2009Y2B211]; CAS/SAFEA International Partnership Program for Creative Research Teams |
| 收录类别 | SCI |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/5147 |
| 专题 | 中国科学院海岸带环境过程与生态修复重点实验室_滨海湿地实验室 |
| 推荐引用方式 GB/T 7714 | Ma, Yuan-Yuan,Guo, Xiu-Lin,Liu, Bin-Hui,et al. The changes of organelle ultrastructure and Ca(2+) homeostasis in maize mesophyll cells during the process of drought-induced leaf senescence[J]. ELECTRONIC JOURNAL OF BIOTECHNOLOGY,2011,14(3):1-10. |
| APA | Ma, Yuan-Yuan,Guo, Xiu-Lin,Liu, Bin-Hui,Liu, Zi-Hui,&Shao, Hong-Bo.(2011).The changes of organelle ultrastructure and Ca(2+) homeostasis in maize mesophyll cells during the process of drought-induced leaf senescence.ELECTRONIC JOURNAL OF BIOTECHNOLOGY,14(3),1-10. |
| MLA | Ma, Yuan-Yuan,et al."The changes of organelle ultrastructure and Ca(2+) homeostasis in maize mesophyll cells during the process of drought-induced leaf senescence".ELECTRONIC JOURNAL OF BIOTECHNOLOGY 14.3(2011):1-10. |
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