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当前位置: 首页 > 文章 > 香鳞毛蕨净光合速率的环境响应及模拟 中国农学通报 2013,29 (10) 58-64
Position: Home > Articles > Environmental Responses and Simulation of Net Photosynthetic Rate in:Dryopteris fragrans (L.) Schott Chinese Agricultural Science Bulletin 2013,29 (10) 58-64

香鳞毛蕨净光合速率的环境响应及模拟

作  者：
梁彦涛;佟伟霜;常缨
单  位：
东北农业大学生命科学学院;平顶山学院;大庆师范学院生命科学学院
关键词：
香鳞毛蕨;光合作用;气孔导度;耦合模型;生理响应
摘  要：
为了探明香鳞毛蕨[Dryopteris fragrans(L.)Schott]净光合速率对环境因子的响应及其函数关系,采用Lci便携式光合仪对野生香鳞毛蕨的瞬时净光合速率(Pn)对环境因子(光合有效辐射(PAR)、温度(Ta)、饱和水汽压差(VPD)和大气CO2浓度(Cs))进行了测定,借助于叶子飘提出的直角双曲线光合作用修正模型和Ball-Berry提出的气孔导度修正模型,建立了耦合模型,探讨模型的准确性、精度及Pn对环境因子的生理响应。结果表明:该模型模拟精度较高,能够很好地模拟香鳞毛蕨主要生长季节的Pn变化规律;香鳞毛蕨Pn对环境因子的响应规律:(1)Pn随PAR的变化出现了陡增,之后又有所下降的现象,当PAR达到1200μmol/(m2·s)左右时,Pn达到最大,为6.5μmol/(m2·s);(2)香鳞毛蕨Pn对Ta的响应呈单峰形变化,最适温度为25℃左右;(3)Pn随Cs的增加而逐渐升高,Cs浓度为300～450μmol/mol时,Pn增加速度较快,随着Cs超过450μmol/mol,Pn上升的较慢;(4)当VPD值达到4.0kPa左右时,Pn达到最高。因此,可以利用此模型结合环境因子模拟Pn,为香鳞毛蕨生产实践提供理论依据。
译  名：
Environmental Responses and Simulation of Net Photosynthetic Rate in:Dryopteris fragrans (L.) Schott
作  者：
Liang Yantao 1,2,Tong Weishuang 3,Chang Ying 1 (1 College of Life Sciences,Northeast Agricultural University,Harbin 150030;2 Life Science Department Daqing Normal University,Daqing Heilongjiang 163712;3 Pingdingshan University,Pingdingshan Henan 467000)
关键词：
Dryopteris fragrans (L.) Schott;photosynthesis;stomatal conductance;coupled model;physiological response
摘  要：
In order to ascertain the respond of net photosynthetic rate (P n) of the leaves of Dryopteris fragrans (L.) Schott to environmental factors and their functions relation model,the Lci portable photosynthesis system was used to measure the P n,photosynthetically active radiation (PAR),temperature (T a),vapor pressure deficit (VPD) and CO2 concentration (Cs) of D.fragrans grew in the wild.With the help of the modified model of rectangular hyperbola described by Zi-Piao Ye and the modified stomatal conductance model of Ball-Berry,a couple model was developed and used for describing the response of P n to environmental factors,PAR,T a,VPD and Cs.It was reified that the model was of high accuracy.The study showed that the net photosynthetic rate throughout the growing season of D.fragrans could be better simulated by the model.Finally,using this coupled model,the response pattern of P n to environmental factors was studied:(1) the response of P n of D.fragrans to PAR was single-apex curves,with the peak 6.5μmol/(m2·s) (P n) appearing at 1200μmol/(m2·s) (PAR);(2) the changes of the P n in response to T a also followed a single peak curve,with an optimal temperature around 25℃;(3) P n showed increased with the increase of C s,however,it displayed a slowly growth rate when C s exceeded 450 μmol/mol;(4) when VPD was about 4.0 kPa,the P n increased to the top.In conclusion,the presented coupled model describing the response of P n in D.fragrans to environmental factors provided an effective method for research on the process of photosynthetic physiological ecology of D.fragrans,which was the foundation of further exploration on the best environmental conditions of D.fragrans.The result showed that model could be used to integrate with the environment factors and this could provide the theory basis for the production practice of D.fragrans.

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