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題名 | Effects of Exogenous Spermine on Polyethylene Glycol-induced Responses in Rice Leaves=外加Spermine對Polyethylene Glycol所誘導水稻切離葉片生理反應之影響 |
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作者姓名(中文) | 程登國; 高景輝; | 書刊名 | 作物、環境與生物資訊 |
卷期 | 7:4 2010.12[民99.12] |
頁次 | 頁233-242 |
分類號 | 434.113 |
關鍵詞 | 過氧化氫; 水稻; 缺水逆境; Spermine; Hydrogen peroxide; Oryza sativa L.; Water stress; |
語文 | 英文(English) |
中文摘要 | 多元胺為多價陽離子,參與植物之許多生理反應。本研究主要是探討spermine(SPM)對水稻切離葉片在缺水狀態下所引起生理反應之影響。我們利用polyethylene glycol 6000 (PEG)來誘導水稻切離葉片之缺水逆境。PEG處理增加葉片過氧化氫、malondialdehyde (MDA)、銨離子、脫落酸含量與降低葉綠素與蛋白質之含量。SPM前處理有效的降低PEG所誘導之過氧化氫、MDA、銨離子與脫落酸含量之增加,同時也減輕PEG所誘導之葉綠素與蛋白質之含量降低。然而,SPM無法克服PEG所導致之水分含量降低與脯胺酸累積。因此,SPM並不能克服所有PEG所誘導之生理反應。 |
英文摘要 | Polyamines are low-molecular weight polycations involved in many physiological processes in plants. In this work, we studied the effects of spermine (SPM) on the responses in detached rice (Oryza sativa L.) leaves caused by water stress. Polyethylene glycol 6000 (PEG) was used to induce water stress of detached rice leaves. Upon treatment with PEG, the contents of H2O2, malondialdehyde, NH4(superscript +), abscisic acid (ABA), and proline increased in detached rice leaves. PEG treatment also resulted in chlorophyll loss and protein degradation in detached. ABA content in detached rice leaves was increased by exogenous application of H2O2. SPM pretreatment was effective in reducing PEG-induced H2O2 production, lipid peroxidation, NH4(superscript +) accumulation, chlorophyll loss, protein degradation, and ABA elevation in detached rice leaves. However, SPM pretreatment had no effect on PEG-induced reduction of relative water content and accumulation of proline. It appears that SPM does not protect against all the responses of detached rice leaves induced by PEG. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。