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

作　　者：张绍先[1,2] 苏智先[2] 高菊[2] 张悦 杨敬天 吴庆贵[2] 

机构地区：[1]西南科技大学生命科学与工程学院,四川绵阳621010 [2]绵阳师范学院生态安全与保护四川省重点实验室,四川绵阳621000 [3]四川省遂宁市环境监测站,四川遂宁629000

出　　处：《四川林业科技》2013年第2期10-15,共6页Journal of Sichuan Forestry Science and Technology

基　　金：国家自然基金(31170319);四川省教育厅项目(11ZB136);四川省社科联项目(MJ-10-05);绵阳师范学院校级课题(1012A03)

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1 650 m时最大,MDA含量在海拔1 590 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1 650 m时最大,紫外吸收物质含量在海拔1 590 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。To explore the physiological adaptation mechanisms of Davidia involucrate to altitudes, studies were made of the relationship between pigment, anthocyanin, malondialdehyde, proline, superoxide dis-mutase,and UV-absorbing compounds contents of Davidia involucrata leaf blades and altitudes. The re-search 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 an- thocyanins and Pro occurred at an altitude of 1 650 m,while the maximum content of UV-absorbing com-pounds occurred at an altitude of 1 590 m;leaf superoxide dismutase （SOD） activity would gradually in-crease 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.

关 键 词：珙桐 色素 花色素苷 丙二醛 游离脯氨酸 超氧化物歧化酶 紫外吸收物质 

分 类 号：S792.99[农业科学—林木遗传育种]