| 腐植酸浸种对盐碱胁迫下小麦幼苗抗氧化系统的影响 |
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| 作者姓名： | Guo W Wang QX |
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| 作者单位： | 1. 沈阳农业大学农学院,沈阳110161;黑龙江八一农垦大学农学院,黑龙江大庆163319
2. 沈阳农业大学农学院,沈阳,110161 |
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| 基金项目： | 黑龙江省科技厅重大项目(G00QY08); 黑龙江省教育厅项目(1153lz17)资助 |
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| 摘 要： | 对龙麦26和克旱16两种不同基因型春小麦品种进行腐植酸浸种处理,研究了腐植酸对盐(NaCl)、碱(Na CO3)两种胁迫下小麦幼苗抗氧化系统的影响.结果表明:盐碱胁迫下小麦幼苗叶片脯氨酸含量增加,膜透性增强,地上部鲜质量降低;盐胁迫下,过氧化氢酶(CAT)活性升高,过氧化物酶(POD)活性降低,超氧化物歧化酶(SOD)活性先升后降,而碱胁迫下CAT和POD活性均升高,SOD活性降低;碱胁迫处理的小麦幼苗叶片抗氧化酶系统活性高于同浓度的盐胁迫处理;腐植酸浸种提高了小麦叶片谷胱甘肽含量,提高了SOD和CAT活性,有效缓解了盐碱胁迫对幼苗生长的影响.不同基因型小麦品种在抵御盐碱胁迫的能力和机制上存在一定差异,且与盐离子组成、浓度间存在一定互作,并受浸种方式调控.
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| 关 键 词： | 小麦 幼苗 盐碱胁迫 抗氧化系统 腐植酸 |
Effects of seed soaking with humic acid on wheat seedlings antioxidant system under salt-alkali stress |
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| Guo W,Wang QX.Effects of seed soaking with humic acid on wheat seedlings antioxidant system under salt-alkali stress[J].Chinese Journal of Applied Ecology,2011,22(10):2539-2545. |
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| Authors: | Guo Wei Wang Qing-xiang |
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| Institution: | GUO Wei1,2,WANG Qing-xiang1 (1College of Agronomy,Shenyang Agricultural University,Shenyang 110161,China,2College of Agronomy,Heilongjiang Bayi Agricultural University,Daqing 163319,Heilongjiang,China). |
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| Abstract: | The seeds of two spring wheat genotypes Longmai 26 and Kehan 16 were soaked with humic acid to study the effects of seed soaking with humic acid on the seedlings antioxidant system of the two genotypes under NaCl and Na2CO3 stresses. Under the salt and alkali stresses, the seedlings leaf proline (Pro) content increased, membrane permeability enhanced, and aboveground fresh mass decreased. Under NaCl stress, the leaf catalase (CAT) activity increased, peroxidase (POD) activity decreased, and superoxide dismu... |
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| Keywords: | wheat seedling salt-alkali stress antioxidant system humic acid |
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