|
水杨酸和阿斯匹林对小麦盐害的缓解作用 |
| |
张士功1 高吉寅2 宋景芝2
摘要：盐胁迫条件下水杨酸和阿斯匹林能提高小麦种子发芽率、发芽指数和活力指数，降低幼苗叶片质膜透性和盐胁迫对细胞膜的伤害，提高幼苗体内超氧化物歧化酶、过氧化物酶等细胞保护酶的活性，减少膜脂过氧化作用产物丙二醛的积累，降低根系Na+和提高根系K+的向上运输选择性。所有这些变化都有利于缓解盐胁迫对小麦的伤害，提高其对盐胁迫的适应性。
关键词：盐胁迫，小麦，水杨酸，阿斯匹林，种子萌发，幼苗生长，缓解作用
学科分类号：Q945
Mitigative Effects of Salicylic Acid and Aspirin on Salt Stress-induced Injuries in Wheat (Triticum aestivum L.)
ZHANG Shi-Gong1， GAO Ji-Yin2 and SONG Jing-Zhi2
（1Upland Research Center, Institute of Agricultural National Resources and Agricultural Regional Planning, 2Department of Stress Resistance, Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, Beijing 100081）
Abstract：Mitigative effects of salicylic acid and aspirin on salt stress-induced injuries during the stage of seed germination and seedling growth were studied in wheat. The results showed that, salicylic acid and aspirin could increase the germination percentage, germination index and vigor index (Fig.1), decrease the leaf relative electric conductivity and salt stress-induced injuries of plasma membrane (Table 1), promote the activities of membrane-protective enzymes such as superoxide dismutase and peroxidase,and delay the accumulation of malon-dialdehyde (Table 2), decrease transportation selectivity of Na+, K+ to shoot (Fig.2). It was also found that under 1.20% NaCl salt stress, the most suitable concentration of exogenous salicylic acid and aspirin were 0.10, 0.20g/L respectively. Therefore the injuries caused by salt stress to wheat seed germination and seedling growth were mitigated and the salt-tolerance of wheat were raised by exogenous salicylic acid and aspirin.
Key words: salt stress, wheat (Triticum aestivum L.), salicylic acid, aspirin, seed germination, seedling growth, mitigative effect
自从1838年Raffaele首先从柳树皮中提取出水杨酸(salicylic acid，SA)以来，水杨酸被广泛地用于植物抗病研究。在植物抗病研究中人们发现水杨酸及其类似物往往诱导植物产生抗盐性状，认为水杨酸可能与植物抗盐性有关(White 1979;Malamy等1990[1] [2] [3] 下一页
上一个医学论文： 苹果果肉质膜微囊主动运输Ca2 的Ca2
下一个医学论文： 白芷细胞外21kD钙调素结合蛋白的生理功能初探
|
|
|
|
|
|
|
您现在的位置： 绿色健康网 >> 医学论文 >> 基础医学论文 >> 正文