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題 名 | Role of Glutathione Reductase and Related Enzymes in Salt-Tolerant Mechanism of Soybean Plants Grown Under Salt-Stress Condition=大豆於逆境下Glutathione Reductase於其耐鹽性機制之生理功能 |
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作 者 | 黃啟穎; 程玉美; | 書刊名 | Taiwania |
卷 期 | 40:1 1995.03[民84.03] |
頁 次 | 頁21-34 |
分類號 | 434.213 |
關鍵詞 | 過氧化氫去除酵素; 脂質過氧化作用; 細胞膜滲透性; 離子滲漏; H2O2scavenging enzymes; Lipid peroxidation; Membrane permeability; Ionic leakage; |
語 文 | 英文(English) |
DOI | 10.6165/tai.1995.40.21 |
中文摘要 | 大豆生長於鹽逆境情況下,若經馴化,其葉細胞中的glutatione reductase等酵素活性,均比未馴化植物高的很多。這些酵素於正常生長情況下均分佈於葉綠體,但在鹽逆境下,其活性大多發現於細胞質中。由於這些酵素活性的增加,使細胞中由於鹽逆鏡所產生的過氧化氫濃度減少,以致減少細胞膜的脂質過氧化作用,而保持細胞膜的完整性。由於細胞膜未被過氧化氫所破壞,所以細胞中的離子或其它物質,則不會滲露出來,也因而使細胞能夠何持適中的滲透壓,以使植物於鹽逆境情況下不致脫水而不能生存。另外,glutathione reductase活性也使細胞中的GSH/GSSG含量比例增加。此比例的提高,也可使植物細胞中含有-SH的酵素保持其原性而不被氧化而失去其催化活性。所以高濃度的GSH/GSSG比例,對植物的耐鹽性也有極重要的生理功能。 |
英文摘要 | Salt-acclimated soybean plants had higher activities of glutathione reductase, than those of non-acclimated plants grown under the salt-stress condition. Those enzymes, which mainly distributed in different organcelles under normal growth condition, became predominantly in cytosol under this adverse environment. Those H2O2 scavenging enzymes might protect the plasma membrane of leaf cells by reducation of the lipid peroxidation might reduce the level of ionic leakage out of cells, and so favors plants to adapt the salt-stress environment. Besides, the glutathione reductase also kept high ratio of GSH/GSSG in cytosol. The high ratio of GSH/GSSG may have positive effects on plants of tolerate the salt-stress environment. |
本系統中英文摘要資訊取自各篇刊載內容。