草地学报

›› 2001, Vol. 9 ›› Issue (4): 283-286.DOI: 10.11733/j.issn.1007-0435.2001.04.008

• 研究论文 • 上一篇    下一篇

低温胁迫对草地早熟禾抗性生理生化指标的影响

梁慧敏1, 夏阳1, 杜峰2, 张普金2   

  1. 1. 山东省林业科学研究所, 济南, 250014;
    2. 甘肃农业大学草业工程学院, 兰州, 730070
  • 收稿日期:2001-01-11 修回日期:2001-08-30 出版日期:2001-11-15 发布日期:2001-11-15
  • 作者简介:梁慧敏(1962- ),女,汉族,宁夏银川人,副教授,硕士.1983年毕业于甘肃农业大学草原系,留校任教至2000年,主要从事牧草遗传育种和生理生化的教学和科研工作,获省地级奖多项,发表论文20多篇.E-mail:lzhsh88@ji-public.sd.chinfo.net.
  • 基金资助:
    甘肃省自然科学基金资助项目编号:ZR-95-047

Effect of Low Temperature Stress on Physiological Process of Kentucky Bluegrass

LIANG Hui-min1, XIA Yang1, DU Feng2, ZHANG Pu-jin2   

  1. 1. Shandong Forestry Academy, Jinan 250014, China;
    2. Gansu Agricultural University, Lanzhou 730070, China
  • Received:2001-01-11 Revised:2001-08-30 Online:2001-11-15 Published:2001-11-15

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摘要： 研究低温胁迫对草地早熟禾生理生化指标的影响。结果表明,在5℃下,超氧化物岐化酶(SOD)和过氧化氢酶(CAT)的活性随着胁迫时间的延长而增加,当4h时出现最大值,之后活性逐渐下降。当温度为0℃与-6℃时,两种酶的活性随着胁迫时间的延长而急剧下降,接近于零,温度越低,下降越快。叶绿素和类胡萝卜素含量随着肋迫时间的延长而下降,温度越低下降越快。5℃对脯氨酸含量无明显影响,在0℃与-6℃时,随着时间的延长,含量则明显增加。5℃和0℃低温胁迫对质膜相对透性无明显影响,-6℃时,质膜相对透性明显增大。供试指标对低温胁迫敏感性的顺序是:超氧化物岐化酶、过氧化氢酶>类胡萝卜素>脯氨酸>叶绿素>质膜相对透性。

关键词: 草地早熟禾, 低温胁迫, 生理生化指标

Abstract: Effects of low temperature stress on physiological process of Kentucky bluegrass (-Poa pratensis-) was investigated. The result showed that under 5℃ the stress activities of SOD and CAT increased with the stress time and reached the peak after 4 hours and them SOD and CAT increased with the stress time and reached the peak after 4 hour and then decreased. Under 0℃ and 6℃ enzyme activities decreased sharply and almost reached the zero. The enzyme activities of 6℃ decreased than that of 0℃. The chlorophyll and carotin contents decreased with the stress time and the lower of temperature was the faster it decreased. Under 5℃ the proline content remained unchanged and under 5℃ and 0℃ it increased significantly with the stress time. Under 5℃ and 0℃ membrane relative penetration remained unchanged and under 6℃ it increased significantly. The order of sensitivity to low temperature stress is SOD,CAT>carotin>proline>chlorophyll>membrane relative penetration.

Key words: Kentucky bluegrass, Low temperature stress, Physiological and biochemica index process

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