光质对臭参幼苗生长及光合特性的影响  

Effects of light quality on growth and photosynthetic characteristics of Codonopsis pilosula (Franch.) Nannf. var. volubilis (Nannf.) seedlings

作　　者：李红 闻高娜 杨永红 普岳红[2] 杨志 LI Hong;WEN Gao-na;YANG Yong-hong;PU Yue-hong;YANG Zhi(Yunnan Agricultural University/Key Laboratory for Agro-biodiversity and Pest Control of Ministry of Education,Kunming 650201,China;School of Food Science and Technology,Yunnan Agricultural University/Yunnan Province Animal Products Processing Engineering Technology Research Center,Kunming 650201,China;Kunming Youzhi Agricultural Science and Technology Service Co.Ltd.,Xundian,Yunnan 650000,China)

机构地区：[1]云南农业大学/农业生物多样性与病虫害控制教育部重点实验室,昆明650201 [2]云南农业大学食品科技学院/云南省畜产品加工工程技术研究中心,昆明650201 [3]昆明有志农业科技服务有限公司,云南寻甸650000

出　　处：《西南农业学报》2022年第5期1101-1107,共7页Southwest China Journal of Agricultural Sciences

基　　金：云南省科技厅云南省2019年中央引导地方科技发展专项(A303209162);杨永红专家工作站。

摘　　要：【目的】探明不同光质条件下,臭参[Codonopsis pilosula(Franch.)Nannf.var.volubilis(Nannf.)L.T.Shen]幼苗生长和光合特性的变化情况,以及臭参种苗生长的最佳光质环境。【方法】以白膜为对照,设置黄膜、绿膜、红膜、蓝膜和黑膜拱棚覆盖处理,分析臭参幼苗的株高、根长、根直径、叶片叶绿素含量、光合参数和叶绿素荧光参数等指标在农膜不同光质条件下的变化情况。【结果】黄膜处理的臭参幼苗株高显著高于白膜,红膜处理也高于白膜但差异不显著,黑膜处理的株高最低;白膜处理幼苗根最长,红膜次之,蓝膜处理的根最粗,显著粗于红膜、黄膜、绿膜和黑膜;黄膜和红膜处理幼苗的叶绿素a、叶绿素b以及总叶绿素含量显著高于白膜,类胡萝卜素含量也高于白膜但差异不显著;黄膜和红膜处理幼苗的净光合速率最高,显著高于白膜;红膜处理的潜在光化学活性(F_(v)/F_(o))最低,最大光能转化效率(F_(v)/F_(m))也显著低于其他处理,黄膜处理的实际量子产量[Y(II)]最高并显著高于白膜,光合活性(qP)各处理的差异不显著,绿膜和蓝膜处理的非光化学猝灭系数(NPQ)显著高于白膜,其他处理与白膜差异不显著,黄膜处理的电子传递速率(ETR)最快,与其他处理差异显著。【结论】黄膜处理有利于臭参幼苗株高的增长;白色和红色农膜有利于臭参幼苗根的生长,蓝膜有利于幼苗根增粗但会抑制根增长;黄膜和红膜处理有利于臭参幼苗叶绿素的积累,绿膜不利于臭参幼苗叶绿素含量积累;黄膜处理下臭参幼苗的PSII潜在光化学活性(F_(v)/F_(o))、实际量子产量[Y(II)]较高,电子传递速率(ETR)最快,红膜处理的最大光能转化效率(F_(v)/F_(m))和潜在光化学活性较低。由此可见黄膜处理提供的光质最利于臭参幼苗的生长和光合作用的进行,在臭参苗期可以采用黄色农膜覆盖来调控光质促进臭参幼苗的生长。【Objective】The changes of growth and photosynthetic characteristics of Codonopsis pilosula(Franch.)Nannf.var.volubilis(Nannf.)L.T.Shen seedlings with different light quality conditions,and the optimal light quality environment for C.pilosula(Franch.)Nannf.var.volubilis(Nannf.)seedlings growth were investigated.【Method】The changes of plant height,root length,root diameter,leaf chlorophyll content,photosynthetic parameters and chlorophyll fluorescence parameters of C.pilosula(Franch.)Nannf.var.volubilis(Nannf.)seedlings with different light quality conditions provided by white film(CK),yellow film,green film,red film,blue film and black film with arching shed treatment.【Result】The plant height of C.pilosula(Franch.)Nannf.var.volubilis(Nannf.)seedlings with yellow film was significantly higher than that with white film,and that with red film was also higher than that with white film,but the difference between them was not significant,and that with black film was the lowest.The root length with white film was the longest,followed by red film,and the root thick with blue film was significantly coarsest than that with red film,yellow film,green film and black film.The contents of chlorophyll a,chlorophyll b and total chlorophyll of the seedlings with yellow film and red film were significantly higher than those with white film,and the content of carotenoid was also higher than that with white film,but the difference between them was not significant.The net photosynthetic rate of the seedlings with yellow film and red film was the highest,which was significantly higher than that with white film.The potential photochemical activity(F_(v)/F_(o))of the red film treatment was the lowest,and the maximum light energy conversion efficiency(F_(v)/F_(m))was also significantly lower than that with other treatments.The actual quantum yield[Y(II)]of the yellow film treatment was the highest and significantly higher than that with the white film treatment.The difference of the photosynthetic activity(qP)among the differe

关 键 词：臭参 光质 幼苗 光合作用 叶绿素荧光参数 

分 类 号：S567[农业科学—中草药栽培]