| 硅对盐胁迫下藜麦生长及抗氧化酶活性的影响 |
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| 引用本文： | 武子璇,王欣,钟明月,封洪雨,仇明慧,李妍.硅对盐胁迫下藜麦生长及抗氧化酶活性的影响[J].现代农业科技,2024(11). |
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| 作者姓名： | 武子璇 王欣 钟明月 封洪雨 仇明慧 李妍 |
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| 作者单位： | 德州学院生命科学学院,德州学院生命科学学院,德州学院生命科学学院,德州学院生命科学学院,德州学院生命科学学院,德州学院生命科学学院 |
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| 基金项目： | 大学生创新创业计划项目;德州学院实验教学改革项目 |
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| 摘 要： | 全球气候变暖降水减少加速了土壤盐渍化进程,对农业生产造成了严重影响,低浓度的盐分对藜麦发育没有明显影响,但盐含量较高的土壤则不利于藜麦的生长。前人研究表明,硅能帮助植物在盐胁迫条件下更好的生长。本实验以4种藜麦为研究材料,在300mmol.L-1盐胁迫条件下设置硅浓度梯度(CK、0、0.5、1、1.5、2 mmol.L-1),研究硅对盐胁迫条件下藜麦幼苗的生长影响及其生理机制,为提高藜麦耐盐性提供参考。结果表明：(1)与对照相比,盐胁迫条件下藜麦幼苗的芽长均明显降低,根长均显著增加；超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)等抗氧化酶活性有不同程度的增加；可溶性糖(SS)含量降低；超氧阴离子自由基(O2.-)产生速率丙二醛(MDA)含量增加。(2)随硅浓度的增加,藜麦幼苗的芽长、根长、SOD、POD、CAT、SS均表现为先增加后降低的趋势,O2.-产生速率和MDA含量先降低后升高。(3)适当浓度外源硅的添加提高了盐胁迫条件下藜麦幼苗的抗氧化酶活性和SS含量,降低O2.-产生速率和MDA含量,促进了藜麦幼苗在盐胁迫条件下的生长,0.5～1mmol.L-1硅浓度效果最好。
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| 关 键 词： | 藜麦 硅 盐胁迫 幼苗生长 抗氧化酶 |
| 收稿时间： | 2023/10/10 0:00:00 |
| 修稿时间： | 2023/10/10 0:00:00 |
Effect of Silica on the Growth and Antioxidant Enzyme Activity of Quinoa under Salt Stress |
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| Authors: | LI Yan |
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| Institution: | College#$NBSof#$NBSLife Science,#$NBSDezhou university,Dezhou,Shandong Province 253023 China |
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| Abstract: | Global warming and reduced precipitation have accelerated the process of soil salinization, causing serious impacts on agricultural production. Low concentrations of salt have no significant impact on the development of quinoa, but soils with high salt content are not conducive to the growth of quinoa. Previous studies have shown that silicon can help plants grow better under salt stress conditions. This experiment used four species of quinoa as research materials, and set silicon concentration gradients (CK, 0, 0.5, 1, 1.5, 2 mmol.L-1) under 300 mmol.L-1 salt stress conditions, to study the effect of silicon on the growth and physiological mechanismsof quinoa seedlings under salt stress conditions, providing reference for improving quinoa salt tolerance. The results showed that: (1) Compared with the control, under salt stress conditions, the shoot length of quinoa seedlings was significantly reduced, while the root length was significantly increased; The activities of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) increased in varying degrees; The content of soluble sugar (SS) decreased; The production rate of superoxide anion free radicals (O2. -) and the content of malondialdehyde (MDA) increases. (2) With the increase of silicon concentration, the bud length, root length, SOD, POD, CAT, and SS of quinoa seedlings showed a trend of first increasing and then decreasing, while the O2. - production rate and MDA content first decreased and then increased. (3) The addition of appropriate concentration of exogenous silicon increased the antioxidant enzyme activity and SS content of quinoa seedlings under salt stress conditions, reduced the O2. - production rate and MDA content, and promoted the growth of quinoa seedlings under salt stress conditions. The best effect was achieved at a concentration of 0.5-1 mmol.L-1 silicon. |
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| Keywords: | quinoa silicon saltSstress Sseedlings growth antioxidative enzymes |
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