期刊论文

中文

中南林业科技大学学报

1673-923X

2015

35

4

56-59

10.14067/j.cnki.1673-923x.2015.04.010

湖南省教育厅重点项目（13A126）；

本校为第一机构

为了研究大苞景天 Sedum amplibracteatum K. T. Fu 的耐热性及在不同高温胁迫下的生理特点，采用美国生产的 Licor6400便携式光合仪对大苞景天的荧光参数进行了测定。结果表明：随着高温胁迫程度的慢慢增加，大苞景天叶片出现卷曲、萎蔫、变黄、干枯脱落等症状，部分植物茎基部变软腐烂，反映了其不耐高温的特点。在高温胁迫过程中，大苞景天叶片相对含水量和荧光参数呈下降趋势，电导率呈上升趋势。大苞景天的生理变化和形态特征，表明其不耐高温。

To study the thermal stability of Sedum amplibracteatum K. T. Fu and physiological characteristics under different high temperature stress, the Licor 6400 portable photosynthetic apparatus produced by U.S.A. was used to determine fluorescence parameters of S. amplibracteatum. The results show that since the degrees of high temperature stress were slowly increased, S. amplibracteatum leaves appeared symptoms of curly, dry, yellow wilting, dried-up and drop, part of the plant stem base were soft and rot, the symptoms reflected that S. amplibracteatum had not temperature withstanding characterist...