西南林业大学学报2017，Vol.37Issue(3)：1-6,6.DOI:10.11929/j.issn.2095-1914.2017.03.001
吉贝和攀枝花对温度升高的生理响应
Physiological Response of Ceiba pentandra and Bombax ceiba to Temperature Increase
摘要
Abstract
The physiological responses of Ceiba pentandra and Bombax ceiba to temperature increase were studied with half-year-old seedlings. The results showed that the relative electrical conductivity of C. pentandra and B. ceiba increased with the increase of temperature, and the semi-lethal high temperatres of them were 47. 4℃ and 49. 6℃, respectively. For C. pentandra, chlorophyll b and chlorophyll ( a +b) increased significantly at 45℃, and carotenoid content increased significantly from 37℃. The chlorophyll content and composition of B. ceiba did not vary significantly with the increase of temperature, but the carotenoid content also increased significantly from 37℃. F o increased and F m and F m/F v decreased significantly for both the tree species at 45℃, but the variation of all the indexes mentioned above were greater in C. pentandra than those in B. ceiba. The content of malondialdehyde ( MDA) in both of C. pentandra and B. ceiba not significantly increased with the increase of temperature, and MDA increased by a greater extent in C. pentandra. The content of soluble sugar and proline in C. pentandra and content of soluble sugar in B. ceiba did not vary with the increase of temperature, but the content of proline increased signif-icantly in B. ceiba. In conclusion, the thermotolerance of B. ceiba is higher than that of C. pentandra, and they might adopt different mechanisms to cope with the increasing of temperature.关键词
温度/叶绿素/调节物质/吉贝/攀枝花Key words
temperature/chlorophyll/osmotic substance/Ceiba pentandra/Bombax ceiba分类
农业科技引用本文复制引用
郑艳玲,马焕成..吉贝和攀枝花对温度升高的生理响应[J].西南林业大学学报,2017,37(3):1-6,6.基金项目
国家自然科学基金项目 (31560093) 资助. （31560093）
