作物杂志Issue(5)：74-85,12.DOI:10.16035/j.issn.1001-7283.2025.05.011
复合盐碱胁迫对燕麦生长及代谢的影响
Effects of Compound Saline-Alkali Stress on Growth and Metabolism of Oat
摘要
Abstract
In order to analyze the mechanism of oat response to compound saline-alkali stress,the emergence rate,phenotypic index,physiological index and metabolome of oat seedling were systematically studied through compound saline-alkali treatment of Xin-17(saline-alkali resistant variety)and Caoyou-1(saline-alkali sensitive variety).The results showed that the emergence rate and seedling phenotype of Xin-17 were significantly better than Caoyou-1.Under compound saline-alkali stress,Xin-17 could maintain higher moisture content of shoot and photosynthetic pigment content.Metabolome studies showed that the expression of 6-hydroxymelatonin was significantly up-regulated in both varieties,particularly in the Caoyou-1(25.6 times).The secondary metabolites such as syringin and sanguinarine showed similar trends in two varieties,and there were no differences between varieties,nor significant differences in expression after stress.A few metabolites showed obvious variety specificity,such as senecionine and rutin were significantly up-regulated in Caoyou-1,while curcumin and scopoletin in Xin-17 were relatively high.Indole-3-acetic acid in Xin-17 maintained a stable level under compound saline-alkali stress,and its key gene of auxin synthesis and the upstream metabolite indole-3-acetamide were upregulated,while the content of indole-3-acetic acid in Caoyou-1 was significantly down-regulated.In addition,the content of pheophorbide A,a degradation product of chlorophyll-a in Xin-17,increased significantly under compound saline-alkali stress,with a maximum increase of 12.8 times.The general characteristics of the above metabolites in response to saline-alkali stress and the diversified metabolic characteristics of different varieties are of great significance for understanding the mechanism of saline-alkali tolerance and breeding of saline-alkali tolerance varieties in oat.关键词
燕麦/幼苗/复合盐碱胁迫/代谢组/生长Key words
Oat/Seedling/Compound saline-alkali stress/Metabolome/Growth引用本文复制引用
赵洲,张丽,高新磊,邱鸿雨..复合盐碱胁迫对燕麦生长及代谢的影响[J].作物杂志,2025,(5):74-85,12.基金项目
国家自然科学基金(32360450) （32360450）
内蒙古自然科学基金(2021MS03026) （2021MS03026）
