海藻糖对盐胁迫下玉米幼苗生长及生理特性的影响

doi:10.11686/cyxb2017156

摘要/Abstract

摘要： 本研究以玉米品种“郑单958”为材料,采用水培试验,探究了外源施加海藻糖对盐胁迫下玉米幼苗生物量、叶绿素含量、膜脂过氧化、抗氧化酶活性以及渗透调节物质等生长和生理特性的影响。结果表明,与对照处理比较,150 mmol/L的盐胁迫显著降低了玉米幼苗地上部干鲜重、叶面积及叶绿素含量,丙二醛(MDA)、脯氨酸(Pro)及可溶性蛋白含量增加、质膜相对透性增大,抗氧化酶活性下降。与盐胁迫处理比较,施加10 mmol/L的海藻糖处理显著增加了盐胁迫下玉米幼苗的生物量和叶绿素含量,降低了MDA含量、Pro含量及质膜相对透性,提高了超氧化物歧化酶(SOD)和过氧化物酶(POD)的活性,促进了可溶性蛋白含量的积累。上述结果表明外源施加海藻糖对盐胁迫下玉米幼苗生长具有一定的缓解作用,从而增强玉米幼苗对盐胁迫的抗性。

Abstract: The aim of this study was to investigate the effects of exogenous trehalose on the growth of maize seedings under salt stress. We evaluated the plant biomass, chlorophyll content, membrane lipid peroxidation, antioxidant enzyme activities, and contents of osmotic adjustment substances in maize seedlings (variety Zhengdan 958) in the control (no NaCl) and under salinity stress (150 mmol/L NaCl) with and without trehalose treatment. The results showed that, compared with the control, salt-stressed seedlings showed significantly lower dry weight, fresh weight, leaf area, chlorophyll content, and antioxidant enzyme activities, and significantly higher malondialdehyde (MDA) content, proline (Pro) content, soluble protein content, and membrane permeability. Among the salt-stressed maize seedlings, those treated with 10 mmol/L trehalose showed significantly increased biomass and chlorophyll content, decreased MDA content, Pro content, and membrane permeability, increased superoxide dismutase (SOD) and peroxidase (POD) activities, and increased soluble protein contents. These results indicated that exogenous trehalose could alleviate the negative effects of salinity stress on maize seedlings, and increase the resistance of maize seedlings to salinity stress.

田礼欣, 曲丹阳, 毕文双, 谢腾龙, 李晶. 海藻糖对盐胁迫下玉米幼苗生长及生理特性的影响[J]. 草业学报, 2017, 26(8): 131-138.

TIAN Li-Xin, QU Dan-Yang, BI Wen-Shuang, XIE Teng-Long, LI Jing. Trehalose alleviates the negative effects of salinity on the growth and physiological characteristics of maize seedlings[J]. Acta Prataculturae Sinica, 2017, 26(8): 131-138.

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