Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Graduate University of the Chinese Academy of Sciences, Beijing 100049, China.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Carbohydr Polym. 2015 Aug 1;126:62-9. doi: 10.1016/j.carbpol.2015.03.028. Epub 2015 Mar 21.
In this study, chitooligosaccharides (COSs) with varying degrees of acetylation (DAs) were applied to wheat seedlings in order to investigate their effect on the plants' defence response under salt stress. The results showed that treatment with exogenous COSs that had different DAs could promote the growth of plants, decrease the concentration of malondialdehyde (MDA), improve the photosynthetic efficiency and enhance the activities of antioxidant enzymes. The mRNA expression level examination of several salt stress response genes suggested that COS could protect plants from the damage of salt stress by adjusting intracellular ion concentration and enhancing the activities of antioxidant enzymes. Furthermore, COS with DA 50% was the most effective in alleviating salt stress to wheat seedlings, which indicated that the activity of COS was closely related with its DAs.
在这项研究中，不同乙酰化程度（DA）的壳寡糖（COSs）被应用于小麦幼苗，以研究它们在盐胁迫下对植物防御反应的影响。结果表明，用具有不同 DA 的外源 COS 处理可以促进植物的生长，降低丙二醛（MDA）的浓度，提高光合作用效率，增强抗氧化酶的活性。对几种盐胁迫响应基因的 mRNA 表达水平检测表明，COS 通过调节细胞内离子浓度和增强抗氧化酶的活性来保护植物免受盐胁迫的伤害。此外，DA 为 50%的 COS 对缓解小麦幼苗盐胁迫最为有效，这表明 COS 的活性与其 DA 密切相关。
