壳寡糖对NaCl胁迫下耐盐性不同西瓜幼苗生理特性的影响Effects of chitosan oligosaccharides on watermelon seedlings with different salt tolerance under NaCl stress
朱迎春;孙德玺;刘君璞;孙小武;
摘要(Abstract):
【目的】壳寡糖能够诱导植物抵抗生物胁迫和非生物胁迫,探究NaCl胁迫下壳寡糖对耐盐性不同的西瓜幼苗生理特性的影响,以期为西瓜抗性育种和盐碱地西瓜栽培提供理论依据。【方法】以2个西瓜材料(‘HQ-2’和‘HQ-3’)为试材,研究在180 mmol·L~(-1)NaCl胁迫下,壳寡糖对耐盐性不同的西瓜幼苗地下和地上部干鲜质量、光合色素含量及SOD、CAT、POD活性和MDA含量的影响。【结果】添加1 g·L~(-1)的壳寡糖可以一定程度提高西瓜幼苗的地下和地上部干鲜质量,增加叶绿素a、叶绿素b、类胡萝卜素含量。在处理10 d后,在180 mmol·L~(-1)NaCl胁迫下和壳寡糖+180 mmol·L~(-1)NaCl处理下不耐盐材料‘HQ-2’的SOD、CAT活性和MDA含量均低于对应的耐盐材料‘HQ-3’,而不耐盐材料‘HQ-2’POD活性高于耐盐材料‘HQ-3’。【结论】添加壳寡糖对不耐盐材料在180 mmol·L~(-1)NaCl胁迫下缓解作用显著,对耐盐材料虽有促进作用,但效果不显著。
关键词(KeyWords): 西瓜;NaCl胁迫;壳寡糖
基金项目(Foundation): 国家现代农业产业技术体系(CARS-25);; 中国农业科学院基本科研业务费专项(Y2019XK16-03);中国农业科学院科技创新工程(CAAS-ASTIP-2020-ZFRI);; 国家重点研发计划(2018YFD0201310);; 郑州市重大科技专项(188PCXZX802)
作者(Author): 朱迎春;孙德玺;刘君璞;孙小武;
Email:
DOI: 10.13925/j.cnki.gsxb.20200035
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