| 摘要: |
| 为寻找提升决明幼苗耐盐性的方法，测量了不同处理下决明幼苗叶片的光合色素、超氧阴离子、丙二醛的含量，以及保护酶系统中SOD、POD、CAT的活性。结果表明，经150 mmol•L 1 NaCl处理，决明幼苗叶片的光合色素含量显著降低，而超氧阴离子、丙二醛的含量以及保护酶SOD、POD、CAT的活性显著升高。不同浓度的外源5 氨基乙酰丙酸在不同程度上增加了决明幼苗叶片的叶绿素、类胡萝卜素含量，进一步增强了保护〖JP2〗酶SOD、POD、CAT的活性，降低了超氧阴离子、丙二醛的含量。在外源5 氨基乙酰丙酸浓度为50 mg•L 1时，恢复效果最为明显(80.0 、196.4 和 114.1 U•g 1)，有效地缓解了盐胁迫对决明幼苗的伤害。 |
| 关键词: 决明 外源5 氨基乙酰丙酸 盐胁迫 生理特性 |
| DOI： |
| 分类号:Q945 |
| 基金项目: |
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| Effects of ALA on physiological characteristics of Cassia obtusifolia seedlings under salt stress |
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XIE YingZan1，2， HE Ping1，2*， WEI PinXiang1，2， LIU HaiYing1，2， DUAN CaiXu1，2， HU Bing1，2
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1.Key Laboratory (Ministry of Education) of Ecoenvironments of Three Gorges Reservoir Region，School of Life Sciences， Southwest University， Chongqing 400715， China;2.Chongqing Key Laboratory of Plant Ecology and Resources Research for Three Gorges Reservoir Region， Chongqing 400715， China
1.Key Laboratory (Ministry of Education)
of Eco environments of Three Gorges Reservoir Region，School of Life Sciences， Southwest University， Chongqing 400715， China； 2.Chongqing Key Laboratory of Plant Ecology and Resources Research for Three Gorges Reservoir Region， Chongqing 400715， China
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| Abstract: |
| In order to get the method to improve the salt resistance of seedlings for Cassia obtusifolia under salt stress，physiological characteristics of C.obtusifolia seedlings were studied. Several physiological indexes of C.obtusifolia seedlings under salt stress like photosynthetic pigment，superoxide anion（O 〖ST4.〗2〖HT〗.），malondialdehyde(MDA)，superoxide(SOD)，peroxidase(POD) and catalase(CAT) were measured. The rate of decrease was relieved and the content of O 〖ST4.〗2〖HT〗.，MDA decreased. The activities of three enzymes including SOD，POD and CAT were increased by the treatment of ALA，and reached the maximin(80.0 U•g 1，196.4 U•g 1 and 114.1 U•g 1 respectively)with the concentration of 50 mg•L 1. ALA with concentration of 50 mg•L 1 could significantly alleviate the damages to the seedlings of C.obtusifolia under salt stress，and promote the salt resistance of the seedlings. |
| Key words: Cassia obtusifolia ALA salt stress physiological characteristics |
