摘要
为筛选耐涝丝瓜砧木,分析丝瓜耐涝机制,采用双因素完全随机设计研究了淹水胁迫对3个不同类型的丝瓜品种荆李1号、早佳、绿冠的根系生长和抗氧化酶活性的影响。结果表明,淹水胁迫下,3个丝瓜品种根系生长均受到抑制,且均形成不定根,根系总长度均始终显著低于对照,根系平均直径均是先显著低于对照,随后均显著高于对照;不定根的丙二醛(MDA)含量均与对照差异不显著,过氧化物酶(POD)和过氧化氢酶(CAT)活性均是先显著高于对照,随后与对照差异不显著。3个品种中,早佳根系生长受抑制最轻,根系总长度减少幅度最小,根系平均直径和体积的增加幅度最大,主根MDA含量的增加幅度最小,不定根形成最早,POD和CAT活性升高最快,恢复平衡也最快。综上所述,3个丝瓜品种均耐淹,其中,早佳最耐淹,是最理想的耐涝丝瓜砧木。
In order to screen waterlogging tolerant luffa rootstocks and analyze the waterlogging tolerant mechanism in luffa,the effects of waterlogging stress on root growth and antioxidant enzyme activity of three different luffa varieties Jingli No.1,Zaojia and Green luffa were studied by two-factor completely random design.The results showed that under waterlogging condition root growth of three luffa varieties was inhibited and adventitious roots were formed.The total root length was significantly lower than that of the control,and the average root diameter was initially significantly lower than that of the control,and then significantly higher than that of the control.The content of malondialdehyde(MDA)in adventitious roots was not significantly different from that of the control,and the activities of peroxidase(POD)and catalase(CAT)in adventitious roots were significantly higher than that of the control initially,then there was no significant difference between the control and the waterlogging stress.Among the three varieties,the growth of Zaojia was inhibited the least,the total root length decreased the least,the average root diameter and volume increased the most,the content of MDA in taproots increased the least,the adventitious roots formed the earliest,and the activities of POD and CAT increased the fastest,and the equilibrium was restored the fastest.Therefore,the three luffa varieties are all waterlogging tolerant,among which,Zaojia is the most waterlogging tolerant rootstock.
作者
朱进
徐兰婷
李文静
ZHU Jin;XU Lanting;LI Wenjing(College of Horticulture and Gardening,Yangtze University,Jingzhou 434025,Hubei,China;Hubei Key Laboratory of Vegetable Germplasm Enhancement and Genetic Improvement,Wuhan 430070,Hubei,China)
出处
《中国瓜菜》
CAS
北大核心
2022年第6期22-28,共7页
China Cucurbits And Vegetables
基金
湖北省重点研发计划项目(2020BBA037)
长江大学湿地生态与农业利用教育部工程中心开放基金(KF201803)
武汉市农业科学院开放性课题(KFXKT201801)
长江大学大学生创新创业训练计划项目(201807607)。
关键词
丝瓜
淹水胁迫
根系
抗氧化酶
Luffa
Waterlogging stress
Root system
Antioxidant enzymes
