[1]刘平,潘文利,魏忠平,等.盐胁迫下白蜡和小胡杨光合生理日变化的响应研究[J].北方园艺,2012,36(01):75-78.
　LIU Ping,PAN Wen-li,WEI Zhong-ping,et al.Effect of Salt Stress on Photosynthetic Diurnal Variation of Fraxinus chinesis andPopulus simonii×P.euphrati Seedlings[J].Northern Horticulture,2012,36(01):75-78.

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盐胁迫下白蜡和小胡杨光合生理日变化的响应研究

《北方园艺》[ISSN:1001-0009/CN:23-1247/S] 卷: 第36卷期数: 2012年01期页码: 75-78 栏目: 出版日期: 2012-01-16

Title:: Effect of Salt Stress on Photosynthetic Diurnal Variation of Fraxinus chinesis andPopulus simonii×P.euphrati Seedlings

文章编号:: 1001-0009（2012）01-0075-04

作者:: 刘平¹; 潘文利²; 魏忠平²; 王玉涛¹; 1.沈阳农业大学林学院，辽宁沈阳 110161；
2.辽宁省林业科学研究院，辽宁沈阳 110032

Author(s):: LIU Ping¹; PAN Wen-li²; WEI Zhong-ping²; WANG Yu-tao¹; 1. College of Forestry, Shenyang Agricultural University, Shenyang, Liaoning 110866;
?2. Liaoning Provincial Research Institute of Forestry Science, Shenyang, Liaoning 110032

关键词:: 盐胁迫; 光合速率; 蒸腾速率; 水分利用效率

Keywords:: salt stress; photosynthetic rate; transpiration rate; water use efficiency

分类号:: S 792.119

文献标志码:: A

摘要:: 以小胡杨、白蜡盆栽苗木为试材，分析其在不同盐分浓度下的光合速率、蒸腾速率、气孔导度等光合生理特征的日变化动态。结果表明：在轻度盐浓度下，白蜡的光合速率、蒸腾速率、气孔导度日变化均呈单峰型，而小胡杨则呈双峰型，白蜡和小胡杨的光合速率最大值均出现在8:00~10:00之间，白蜡的最大值为CO₂9.4364 μmol?m^-2.?s^-1.，低于小胡杨的CO₂16.304 μmol?m^-2.?s^-1.，但二者的水分效率相接近；在中度盐浓度下，白蜡光合速率日变化由单峰型变为双峰型，小胡杨则仍为双峰型，白蜡光合速率最大值仍出现在8:00~10:00之间，而小胡杨则出现在14:00~16:00之间，白蜡的最大光合速率为CO25.6575 μmol?m^-2.?s^-1，比轻度盐胁迫的下降了40%，小胡杨为CO₂4.352 μmol?m^-2.?s^-1.，比轻度盐胁迫的下降了73.3%，二者水分利用效率也基本接近。

Abstract:: The Fraxinus chinesis and Populus simonii×P.euphrati seedlings were used as experimental material to study the effect of salt stree on the photosynthetic diurnal variation. The results showed that the photosynthetic rate, transpiration rate, stomatal conductance diurnal variation of Fraxinus chinesis showed a single peak type, while Populus simonii×P.euphrati was double peak type under mild salt stress. The maximum value of photosynthetic rate of Fraxinus chinesis and Populus simonii×P.euphrati Seedlings all appeared at 8:00~10:00, the maximum value were CO₂9.4364 μmol?m^-2.?s^-1. and CO₂16.304 μmol?m^-2.?s^-1. respectively, but the water use efficiency were close. In moderate salt stress, the photosynthetic rate diurnal variation of Fraxinus chinesis was double peak type, while Populus simonii×P.euphrati was single peak type. The maximum value of photosynthetic rate of Fraxinus chinesis seedlings appeared at 8:00~10:00, while Populus simonii×P.euphrati seedlings appeared at 14:00~16:00. The maximum photosynthetic rate of Fraxinus chinesis was CO₂5.6575 μmol?m^-2.?s^-1. decreased 40% than that of mild salt stree, the maximum photosynthetic rate of Populus simonii×P.euphrati seedlings was CO₂4.352 μmol?m^-2.?s^-1. decreased 73.3% than that of mild salt stree, but the water use efficiency also were close.

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备注/Memo

第一作者简介：刘平（1979-），男，博士，讲师，研究方向为森林培育与林木生长模型。E-mail: lp_79@163.com。?

?基金项目：国家林业科技支撑计划资助项目(2009BADB2B0503)。

收稿日期：2011-10-08

更新日期/Last Update: 2014-08-23