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应用生态学报 ›› 2003, Vol. ›› Issue (10): 1637-1640.

• 研究报告 • 上一篇    下一篇

三唑酮对黄瓜幼苗生长及抗寒性的影响

冯兆忠1, 王静2, 冯宗炜1   

  1. 1. 中国科学院生态环境研究中心, 北京 100085;
    2. 兰州大学干旱农业生态国家重点实验室, 兰州 730000
  • 收稿日期:2001-11-26 修回日期:2002-09-06 出版日期:2003-10-15
  • 通讯作者: 冯兆忠,男,1976年生,博士研究生,主要从事植物生理生态及污染生态学研究,发表论文5篇.E-mail:zhzfeng201@sina.com.cn.
  • 基金资助:
    中国农业科学教育基金资助项目(970103)

Effect of triadimefon on cucumber seedlings growth and their resistance to chilling injury

FENG Zhaozhong1, WANG Jing2, FENG Zongwei 1   

  1. 1. Research Center for Eco- Environ mental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
    2. State Key Laboratory of Arid Agroecology of Lanzhou University, Lanzhou 730000, China
  • Received:2001-11-26 Revised:2002-09-06 Online:2003-10-15

摘要: 研究了不同浓度三唑酮浸种对黄瓜幼苗生物量及抗寒性的影响.结果表明,20~100μmol·L-1三唑酮能显著抑制黄瓜幼苗的株高、根长,增加了根重、根冠比和叶绿素含量.30d幼苗经过3d低温胁迫后,10~50μmol·L-1三唑酮处理能保持较高的叶绿素含量,有效地降低质膜相对透性,维持较高的SOD活性.50μmol·L-1三唑酮处理明显减缓低温胁迫过程中MDA的累积.另外,50μmol·L-1三唑酮处理在低温胁迫第1d促进脯氨酸的累积.在第3d脯氨酸反而低于对照.但高浓度(>100μmol·L-1)三唑酮不利于幼苗抵御低温伤害.总的来看,三唑酮增强了黄瓜幼苗的耐寒性.

Abstract: Studies on the effects of different concentrations of triadimefon on cucumber seedlings growth and their resistance to chilling injury showed that 20~100 μmol·L-1 triadimefon inhibited the shoot or root length of cucumber seedlings, and increased their root weight or root/ shoot ratio and chlorophyll content significantly.After at low temperature for 3 days, a higher chlorophyll content, lower membrane relative permeability and higher SODactivity were observed in the leaves of cucumber seedlings soaked with 10~50 μmol·L-1 triadimefon.50 μmol· L-1 triadimefon could retard the accumulation of MDA at low temperature stress.It was also observed that 50 μmol·L-1 triadimefon enhanced the accumulation of praline at the first day of chilling treatment.However, higher concentrations(> 100 μmol ·L-1) of triadimefon were unfavorable for cucumber seedlings to defense a-gainst low temperature.It was thus concluded that triadimefon protected the cucumber seedlings against low temperature.

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