期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2008

34

1

18-21

湖南省重大科技攻关项目（99KY202121） 感谢湖南省衡阳龙须草科技公司提供试验基地.

本校为第一机构

通过对龙须草田间越冬存活率、低温半致死温度、2 ℃和7 ℃下叶绿素含量及过氧化物酶(POD),过氧化氢酶(CAT),超氧化物歧化酶(SOD)等保护酶活性的研究,探讨龙须草在低温胁迫下的生理生化变化.结果表明,12月至翌年1月刈割龙须草的安全越冬率不低于95%,显著高于11月刈割的;3～10 cm的刈割高度对龙须草越冬没有影响;龙须草叶片细胞膜相对电导率随温度的下降而增加,低温半致死临界温度约为-3.5 ℃;与常温相比,叶绿素含量在7 ℃下变化不明显,2 ℃处理48 h后显著下降,减少了53.0%.2 ℃处理24 h的龙须草叶片POD和CAT活性最大,分别高于对照69.9%和90.3%%,而SOD活性变化不大.3种酶对低温胁迫的响应大小顺序...

The experiment of cold hardiness of Eulaliopsis binata was conducted after winter mowing and livability rate, low temperature for 50% killed with EC test, chlorophyl content and antioxidant enzyme activities in the leaves were investigated under 2 ℃ and 7 ℃ low temperatures. The results showed that the high livability （〉95%） after mowing was obtained during the period from December to next January, which was significant higher than that of mowing in November. No difference was observed for livability rate with 3-10 cm mowing height over al...