盐和碱胁迫对燕麦(Avena sativa L.)幼苗生长与生理的影响
Saline and Alkaline Stresses on Growth and Physiological Changes in Oat (Avena sativa L.) Seedlings
DOI: 10.12677/HJAS.2018.810178, PDF,    国家自然科学基金支持
作者: 高战武*, 段江华, 陈晓钰, 刘权昱, 辛玉洁, 王丽红：白城师范学院旅游与地理科学学院，吉林 白城；张继涛：中国科学院东北地理与农业生态研究所，吉林 长春；唐佳红：东北师范大学草原科学研究所，教育部植被生态重点实验室，吉林 长春
关键词: 燕麦(Avena sative)；盐胁迫；碱胁迫；pH；有机酸；生理响应；Oat (Avena sativa L.)； Salt Stress； Alkali Stress； pH； Organic Acid； Physiological Response
摘要: 本研究将两种中性盐(NaCl和Na2SO4)和两种碱性盐(NaHCO3和Na2CO3)均按摩尔质量比例2:1混合，并分为A、B两组，每个组内设置6个总盐浓度梯度(48~168 mM)共模拟出12种盐度和碱度(pH值)各不相同的混合盐碱条件，对生长4周的燕麦(Avena sative)幼苗进行胁迫处理9天后，研究结果表明：燕麦的生长受到影响，燕麦为了抵御盐胁迫的Na+离子毒害和渗透胁迫，主要采取了大量积累Cl−、SO42- 和脯氨酸的生理响应机制和适应对策，而与有机酸无关。但是在高pH值的碱胁迫下，燕麦主要采取了大量积累有机酸抵御高pH值，积累脯氨酸生理响应机制和适应对策，而与Cl−基本无关。Cl−和有机酸在两种胁迫下完全不同的变化，是两者生理响应机制和适应对策的根本区别所在。这样保证体内的地上部分组织液pH值的稳定。
Abstract: In this study, two neutral salts (NaCl and Na2SO4) and two alkaline salts (NaHCO3 and Na2CO3) were mixed in the Anmoer mass ratio 2:1 and divided into two groups A and B. Six total salt concentration gradients (48 - 168 mM) were set in each group to simulate a total of 12 mixed saline conditions with different salinity and alkalinity (pH), and four weeks of growth for the Avena seedlings. After 9 days of stress treatment, the results show that the growth of oats is affected. In order to resist the Na+ ion poisoning and osmotic stress of salt stress, oats have mainly adopted a large number of physiological response mechanisms and adaptation strategies for accumulating Cl−, SO42- and proline, but not organic acids. However, under high pH alkali stress, oats mainly take a large number of accumulated organic acids to resist high pH, accumulate proline physiological response mechanisms and adaptation countermeasures, and have nothing to do with Cl−. The change of Cl− and organic acid under two kinds of stress is the fundamental difference between the physiological response mechanism and the adaptive countermeasures.
文章引用：高战武, 张继涛, 唐佳红, 段江华, 陈晓钰, 刘权昱, 辛玉洁, 王丽红. 盐和碱胁迫对燕麦(Avena sativa L.)幼苗生长与生理的影响[J]. 农业科学, 2018, 8(10): 1213-1225. https://doi.org/10.12677/HJAS.2018.810178

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