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张绍先, 苏智先, 高菊, 张悦, 杨敬天, 吴庆贵. 不同海拔对珙桐叶片生理指标的影响[J]. 四川林业科技, 2013, 34(2): 10-15. DOI: 10.16779/j.cnki.1003-5508.2013.02.002
引用本文: 张绍先, 苏智先, 高菊, 张悦, 杨敬天, 吴庆贵. 不同海拔对珙桐叶片生理指标的影响[J]. 四川林业科技, 2013, 34(2): 10-15. DOI: 10.16779/j.cnki.1003-5508.2013.02.002
ZHANG Shao-xian, SU Zhi-xian, GAO Ju, ZHANG Yue, YANG Jing-tian, WU Qing-gui. Effects of Altitudes on Physiological Indicators of Davidia Involucrata Leaves[J]. Journal of Sichuan Forestry Science and Technology, 2013, 34(2): 10-15. DOI: 10.16779/j.cnki.1003-5508.2013.02.002
Citation: ZHANG Shao-xian, SU Zhi-xian, GAO Ju, ZHANG Yue, YANG Jing-tian, WU Qing-gui. Effects of Altitudes on Physiological Indicators of Davidia Involucrata Leaves[J]. Journal of Sichuan Forestry Science and Technology, 2013, 34(2): 10-15. DOI: 10.16779/j.cnki.1003-5508.2013.02.002

不同海拔对珙桐叶片生理指标的影响

Effects of Altitudes on Physiological Indicators of Davidia Involucrata Leaves

  • 摘要: 为探讨珙桐(Davidia involucrate Baill.)对海拔的生理适应机制,研究珙桐叶片中色素、花色素苷、丙二醛(MDA)、游离脯氨酸(Pro)、超氧化物歧化酶(SOD)、紫外吸收物质的含量与海拔的关系是十分重要的。结果表明:珙桐叶片中叶绿素a、b、类胡萝卜素、MDA的含量随海拔高度的增加,呈减少的趋势,叶绿素a/b值在海拔1650 m时最大,MDA含量在海拔1590 m时最高;花色素苷、紫外吸收物质、Pro的含量随着海拔高度的增加,呈先增高后降低的趋势。花色素苷和Pro含量在海拔1650 m时最大,紫外吸收物质含量在海拔1590 m时最高;珙桐叶片中超氧化物歧化酶(SOD)的活性随海拔高度的递增而逐渐增加。综合本次研究表明,珙桐在一定海拔范围内,受到高海拔不利环境的胁迫时,可通过自身内部的调节保护自己。

     

    Abstract: To explore the physiological adaptation mechanisms of Davidia involucrate to altitudes, studies were made of the relationship between pigment, anthocyanin, malondialdehyde, proline, superoxide dismutase, and UV-absorbing compounds contents of Davidia involucrata leaf blades and altitudes. The research results showed that chlorophyll a and b, carotenoids, MDA content would decrease with the increase of an altitude, the maximum value of chlorophyll a/b ratio occurred at an altitude of 1 650 m, while the maximum contents of MDA occurred at an altitude of 1 590 m; anthocyanins, UV-absorbing compounds and Pro contents would reduce after first increasing with increasing altitude. The maximum contents of anthocyanins and Pro occurred at an altitude of 1 650 m, while the maximum content of UV-absorbing compounds occurred at an altitude of 1 590 m; leaf superoxide dismutase (SOD) activity would gradually increase with altitude increasing. In general, when Davidia involucrate got stress from adverse environment at high altitudes, it could protect itself by internal regulation in a certain altitude range.

     

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