核农学报2024，Vol.38Issue(10)：2011-2019,9.DOI:10.11869/j.issn.1000-8551.2024.10.2011
干旱胁迫诱导的花青素积累与谷子抗旱性增强的关系研究
The Relationship between Drought Stress-Induced Anthocyanin Accumulation and the Enhanced Drought Tolerance in Foxtail Millet
摘要
Abstract
Anthocyanins accumulation could enhance plant stress resistance by improvement of the antioxidant capacity.Foxtail millet(Setaria italica)is a kind of crop with strong drought resistance,but the relationship between anthocyanins accumulation and responses to drought stress in foxtail millet is not clear.In this study,the drought resistance of 60 purple-leaf foxtail millet varieties was identified,and two drought resistant varieties and two drought sensitive varieties were selected to analyze the relationship between anthocyanins accumulation induced by drought stress.The results showed that the content of anthocyanins in two drought-resistant varieties significantly increased under drought stress,which was significantly higher than that in drought-sensitive varieties.Compared with normal watering,the anthocyanin content in drought-resistant varieties B85 and B125 was increased by 56%and 48%respectively after 10 days of drought stress,while that in drought-sensitive varieties B49 and B51 was increased by 31%and 40%,respectively.The content of malondialdehyde(MDA)in the drought-resistant varieties was lower than that in the drought-sensitive varieties.Compared with normal watering,the malondialdehyde content in B85 and B125 was increased by 7%and 23%after 10 days of drought stress,while that in B49 and B51 was increased by 63%and 35%,respectively.The accumulation of proline and soluble sugar in drought-resistant varieties was higher than that in sensitive varieties.Compared with normal watering,the proline content in B85 and B125 was increased by 487%and 666%after 10 days of drought stress,while the soluble sugar content was increased by 164.4%and 93.5%,respectively.The proline content in B49 and B51 was increased by 445%and 58%after 10 days of drought stress,while the soluble sugar content was increased by 6.5%and 69.9%,respectively.Compared with normal watering,the expression levels of stress-related genes and anthocyanin synthesis-related genes were significantly increased after 5 days of drought stress in drought-resistant varieties B85 and B125 while down regulated in drought-sensitive varieties B49 and B51.In this study,germplasm resources with high anthocyanin content and drought resistance were identified,and the relationship between anthocyanin accumulation and drought responses was preliminarily explored,which provided a theoretical basis for the full utilization of purple-leaf varieties and uncovering the mechanism of drought resistance in foxtail millet.关键词
谷子/花青素/种质资源/抗旱性Key words
foxtail millet/anthocyanin/germplasm resources/drought resistance引用本文复制引用
杨明真,孟小霞,王晨晨,李红英,李雅琼..干旱胁迫诱导的花青素积累与谷子抗旱性增强的关系研究[J].核农学报,2024,38(10):2011-2019,9.基金项目
国家自然科学基金(32101760),山西省基础研究计划(自然科学类)(20210302123362) （32101760）
