窝儿七的光合作用与环境因子间的关系研究  

Study on Relationship Between Wo’erqi Photosynthesis and Environmental Factors

作　　者：孙涛[1] 雷瑞祥 刘永 裴青青 SUN Tao;LEI Ruixiang;LIU Yong;PEI Qingqing(Shaanxi University of Chinese medicine,Shaanxi Xianyang 712046,China)

机构地区：[1]陕西中医药大学,陕西咸阳712046

出　　处：《陕西中医药大学学报》2022年第4期22-27,共6页Journal of Shaanxi University of Chinese Medicine

基　　金：陕西省自然科学基础研究计划项目(2017JM8111);2019年医疗服务与保障能力提升补助资金项目(中医药事业传承与发展部分第四次全国中药资源普查项目)[财社(2019)39号]。

摘　　要：目的研究窝儿七叶片光合响应特征及光合参数日变化与环境因子之间的关系。方法运用便携式光合测定仪测定窝儿七叶片光合参数日变化并运用Excel 2007和SPSS 20.0软件进行正交数据处理分析。结果窝儿七叶片净光合速率(P_(n))日变化、气孔导度(G_(s))日变化均呈“单峰”曲线,存在微弱的“光合午休”现象;净光合速率最大值为16.21μmol·m^(-2)·s^(-1),气孔导度在11时达到最大,其最大值为0.56μmol·m^(-2)·s^(-1)。净光合速率(P_(n))与主要影响因子光合有效辐射(PAR),细胞间CO_(2)浓度(C i),蒸腾速率(T_(r)),气孔导度(G_(s))呈正相关,与空气相对湿度(RH),气孔限制(L_(s))呈负相关。结论窝儿七为气孔限制型植物,净光合速率存在微弱的“光合午休”现象,光合有效辐射、胞间CO_(2)浓度、蒸腾速率、气孔导度是影响窝儿七叶片净光合速率(P_(n))的主要影响因子。此研究对窝儿七栽培提供了科学的参考依据、提高药材质量和产量,对窝儿七栽培以及发展具有重要意义。Objective To study the characteristics of photosynthetic response and the relationship between diurnal variation of photosynthetic parameters and environmental factors in leaves of Wo erqi.Methods The diurnal changes of photosynthetic parameters in leaves of wo erqi were measured by portable photosynthetic analyzer,and orthogonal data processing and analysis were carried out by Excel 2007 and SPSS 20.0 software.Results The diurnal changes of net photosynthetic rate(P_(n))and stomatal conductance(G_(s))in leaves of wo erqi showed a“single peak”curve,and there was a weak“noon break”phenomenon;The maximum value of net photosynthetic rate was 16.21μmol·m^(-2)·s^(-1),and the maximum value of stomatal conductance was 0.56μmol·m^(-2)·s^(-1)at 11 o clock.Net photosynthetic rate(P_(n))was positively correlated with photosynthetic active radiation(PAR),intercellular CO_(2)concentration(C i),transpiration rate(T_(r))and stomatal conductance(G_(s)),and negatively correlated with air relative humidity(RH)and stomatal limitation(L_(s)).Conclusion Wo erqi is a stomatal restricted plant,and there is a weak phenomenon of“photosynthetic noon break”in net photosynthetic rate.Photosynthetic effective radiation,intercellular CO_(2)concentration,transpiration rate and stomatal conductance are the main influencing factors on net photosynthetic rate(P_(N))of leaves of wo erqi.This study provides a scientific reference for the cultivation of wo erqi,improves the quality and yield of medicinal materials,and is of great significance for the cultivation and development of wo erqi.

关 键 词：窝儿七 气孔导度 日变化 气孔限制 净光合速率 

分 类 号：R284[医药卫生—中药学]