外源褪黑素对盐胁迫下小麦幼苗生理特性的影响

高宝云; 朱亚坤; 崔雨晴; 王新军; 张 军

首页 | 编委会 | 投稿须知 | 审稿指南 | 期刊简介 | 在线下载 | 联系我们 | 论文自检 | 电子书

外源褪黑素对盐胁迫下小麦幼苗生理特性的影响

Effects of Exogenous Melatonin on Growth and Physiological Characteristics of Wheat Seedlings under Salt Stress

DOI：

中文关键词: 盐胁迫小麦幼苗褪黑素生长指标生理指标

英文关键词:Salt stress Wheat seedlings Melatonin Growth indexes Physiological indexes

基金项目:陕西省大学生创新创业训练计划项目（S202111396036）；商洛市秦岭植物良种繁育中心专项科研经费。

作者	单位
高宝云，朱亚坤，崔雨晴，王新军，张军	（1. 商洛学院生物医药与食品工程学院,陕西商洛 726000 2. 商洛市秦岭植物良种繁育中心,陕西商洛 726000）

摘要点击次数: 452

全文下载次数: 152

中文摘要:

为明确适宜浓度褪黑素对小麦幼苗的抗盐生理效应，以商麦5226和商麦1619为试验材料，设置对照(CK)、250 mmol/L NaCl溶液（S）,S+25 μmol/L褪黑素溶液（25MT），S+50 μmol/L褪黑素溶液（50MT）、S+100 μmol/L褪黑素溶液（100MT）、S+200 μmol/L褪黑素溶液（200MT）和S+400 μmol/L褪黑素溶液（400MT）7个处理，研究褪黑素对小麦幼苗生理特性的影响。结果表明：外源褪黑素不同程度地改善了盐胁迫下小麦幼苗的生理特性，200MT显著提高了盐胁迫下两种小麦幼苗的株高、根长、干重、鲜重、根冠比、叶绿素含量、可溶性糖含量、POD活性和SOD活性，显著降低了盐胁迫下幼苗丙二醛（MDA）含量和脯氨酸含量。200 μmol/L褪黑素可明显改善盐胁迫下的小麦生长状况，是改善盐胁迫下小麦生长的适宜浓度。

英文摘要:

To clarify the physiological effects of melatonin at optimal concentrations on enhancing salt tolerance in wheat seedlings, the wheat cultivars ‘Shangmai 5226’ and ‘Shangmai 1619’ were used as experimental materials. Treatments included a control (CK), 250 mmol/L NaCl solution (S), S + 25 μmol/L melatonin (25MT), S + 50 μmol/L melatonin (50MT), S + 100 μmol/L melatonin (100MT), S + 200 μmol/L melatonin (200MT), and S + 400 μmol/L melatonin (400MT). The effects of melatonin on growth and physiological characteristics were evaluated under salt stress. The results showed that all melatonin treatments (25~400 μmol/L) improved the growth and physiological characteristics of wheat seedlings under salt stress to varying degrees. The 200MT treatment significantly increased plant height, root length, dry weight, fresh weight, and root-to-shoot ratio, as well as chlorophyll content, soluble sugar content, peroxidase (POD) activity, and superoxide dismutase (SOD) activity, while significantly reducing malondialdehyde (MDA) and proline content in both cultivars. These findings indicate that 200 μmol/L melatonin effectively alleviates the adverse effects of salt stress and represents an optimal concentration for promoting wheat seedling growth under such conditions.

查看全文查看/发表评论下载PDF阅读器

关闭