强光胁迫对茅苍术光合荧光参数的影响  

Effects of Strong Light Stress on Photosynthetic Fluorescence Parameters of Atractylodes lancea

作　　者：孙永娣 王玉卓 谷巍[1] 巢建国[1] SUN Yongdi;WANG Yuzhuo;GU Wei;CHAO Jianguo(School of Medicine,Nanjing University of Chinese Medicine,Nanjing,Jiangsu 210046;Shandong Hongjitang Pharmaceutical Group Co.Ltd.,Jinan,Shandong 250100)

机构地区：[1]南京中医药大学药学院,江苏南京210046 [2]山东宏济堂制药集团股份有限公司,山东济南250100

出　　处：《北方园艺》2021年第22期112-116,共5页Northern Horticulture

基　　金：国家自然科学基金资助项目(81573520);2019年医疗服务与保障能力提升补助资金资助项目(财社[2019]39号)。

摘　　要：以茅苍术种苗为试材,采用模拟光照胁迫土壤盆栽试验的方法,研究了在不同光照条件下(CK 18.26%~36.04%,T151.10%,T280.73%,T3100%)20 d后茅苍术叶片光合荧光参数以及净光合速率的光响应曲线,以期揭示光对茅苍术光合荧光作用的适应机制。结果表明:强光胁迫下净光合速率(Pn)、蒸腾速率(Tr)、实际光化学量子效率(PhiPS2)、光化学淬灭系数(qP)、电子传递效率(ETR)、瞬时水分利用效率(WUE)和光化学量子效率(Fv/Fm)随光照强度的增加均呈先升后降趋势,胞间CO_(2)浓度(Ci)和非光化学淬灭系数(NPQ)则呈相反变化,Pn随PAR的增长到达最高点的关系为T1>T2>CK>T3。综上可知,当光照强度达到100%后茅苍术的光合效率会受到严重抑制。Taking the seedling of Atractylodes lancea as the experimental material,the pot experiment of simulated illumination stress soil was carried out under different light conditions(CK 18.26%-36.04%,T151.10%,T280.73%,T3100%),photosynthetic fluorescence parameters and net photosynthetic rate of leaves of Atractylodes lancea were measured 20 days later,in order to reveal the adaptive mechanism of light on photosynthetic fluorescence of Atractylodes lancea.The reseults showed that the values of net photosynthetic rate(Pn),transpiration rate(Tr),real photochemical quantum efficiency(PhiPS2),photochemical quenching coefficient(qP),electron transfer efficiency(ETR),instantaneous water use efficiency(WUE)and photochemical quantum efficiency(Fv/Fm)increased and then decreased with the increase of illumination intensity.The values of intercellular CO_(2)concentration(Ci)and non-photochemical quenching coefficient(NPQ)were reversed.The order of relationship between Pn value and PAR increase to the highest point was T1>T2>CK>T3.In conclusion,when the light intensity reached 100%,the photosynthetic efficiency of Atractylodes lancea was severely inhibited.

关 键 词：茅苍术 光合荧光 光响应曲线 

分 类 号：S567.211[农业科学—中草药栽培]