RssE-mail Alert
Subtropical Plant Science

Subtropical Plant Science ›› 2008, Vol. 37 ›› Issue (03): 26-30.

Previous Articles     Next Articles

A Study on Photosynthetic physiology of Poplar ‘Zhongxin 4’ in Summer

YANG Wei-ping1,2, WU Rui-yun1, DAI Yue3,4   

  1. 1. Key Lab for Biotechnology of the State Ethnic Affairs Commission, College of Life Sciences, South-Central University for Nationalities, Wuhan 430074, Hubei China;
    2. Enshi Vocational and Technical College, Enshi 445000, Hubei China;
    3. Department of Chemistry and Biology, Hubei University of Education, Wuhan 430205, Hubei China;
    4. Collage of life science, Guangxi Normal Univasity, Guilin 541004, Guangxi China
  • Received:2008-03-25 Online:2008-09-10 Published:2008-09-10

‘中新4’杨树夏季光合生理特性研究

杨维平1,2,吴瑞云1,戴月3,4   

  1. 1. 中南民族大学 国家民委生物技术重点实验室, 湖北 武汉 430074;
    2. 湖北恩施职业技术学院, 湖北 恩施 445000;
    3. 湖北第二师范学院 化学与生命科学系, 湖北 武汉 430205;
    4. 广西师范大学 生命科学学院, 广西 桂林 541004
  • 作者简介:杨维平(1964-),男,湖北松滋人,副教授,硕士,从事植物生理生态研究。
  • 基金资助:

    广西自然科学基金(桂科自0542033)资助

PDF

Abstract: The photosynthetic physiology of poplar ‘Zhongxin 4’ (Populus deltoides CL. ‘Zhongxin 4’) was studied in this paper. The result showed that the net photosynthetic rate (Pn) decreased in high temperature stress (above 32℃), and stomatal limitation was the most important factor at early stage. With the elongation of time in high temperature and reduction of relative humidity(RH), stomatal and non-stomatal limitation acted simultaneously. The heat tolerance of poplar ‘Zhongxin 4’ varied with RH. When RH decreased, the temperature stress increased, the solar energy utilization efficiency decreased. Under humid condition, Pn was positively correlated with photosynthetic active radiation (PAR). Under arid condition, Pn was positively correlated with RH.

Key words: poplar ‘Zhongxin 4’, photosynthetic physiology, summer

摘要： 研究了南方杨树主栽品种‘中新4’(Populus deltoides CL. ‘Zhongxin 4’)幼株在6、7月两种不同生态条件下的光合生理特性。结果表明,高温(≥32℃)初期的净光合速率下降以气孔限制因素为主导;随高温时间延长和RH(相对湿度)降低,气孔及非气孔限制同时作用。‘中新4’对高温胁迫的耐受程度随RH的不同而变化,RH降低,温度胁迫程度加大,表观量子效率下降。在空气湿润条件下,Pn(净光合速率)与PAR(叶片光合有效辐射)呈正相关;而在空气干燥的条件下,Pn与RH呈正相关。

关键词: 杨树&lsquo, 中新4&rsquo, 光合生理特性, 夏季

CLC Number: 

Copyright © Editorial office of Subtropical Plant Science
Tel: 0592-5654157　E-mail: yrdzwkx@126.com
Supported by Beijing Magtech Co., Ltd.