凹叶厚朴和无患子光响应特征与叶绿素荧光参数的比较  

Comparisons on photosynthetic light response characteristics and chlorophyll fluorescence parameters between Magnolia officinalis subsp. Biloba and Sapindus mukorossi

作　　者：赖金莉 陈剑成 陈凌艳 荣俊冬[2] 何天友 郑郁善 LAI Jinli;CHEN Jiancheng;CHEN Lingyan;R0NG Jundong;HE Tianyou;ZHENG Yushan(College of Landscape Architecture,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China)

机构地区：[1]福建农林大学园林学院 [2]福建农林大学林学院,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2018年第2期174-180,共7页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金："十二五"国家科技支撑计划项目(2011BAI01B06);福建省科技创新平台资助项目(2008Y2001)

摘　　要：以2年生凹叶厚朴和无患子为试验材料,测定并比较了两者的光响应特征参数、气体交换参数和叶绿素荧光参数.结果表明:(1)无患子的最大净光合速率(A_(max))、光饱和点(LSP)、光补偿点(LCP)、暗呼吸速率(R_d)及表观量子效率(AQY)都高于凹叶厚朴;(2)无患子的气孔导度(G_s)、胞间CO_2浓度(C_i)和蒸腾速率(T_r)均高于凹叶厚朴,气孔限制值(L_s)和水分利用效率(WUE)均低于凹叶厚朴,两者的G_s、C_i和WUE差异显著,L_s差异较小;(3)凹叶厚朴的初始荧光(F_o)、最大荧光(F_m)、非光化学猝灭系数(qN)都显著大于无患子,最大光化学效率(F_v/F_m)、实际光化学效率(Φ_(PSⅡ))和光电子传递速率(ETR)均显著低于无患子,两者的光化学猝灭系数(qP)差异不显著.表明无患子和凹叶厚朴都是喜光植物,无患子利用强光和弱光的能力大于凹叶厚朴,无患子的耐荫性和对环境的适应能力比凹叶厚朴强.To study light utilization ability,shade tolerance and adaptability to the environment for ornamental tree,2-year-old Magnolia officinalis subsp. Biloba and Sapindus mukorossi were used as test materials. Characteristic parameters of photoresponse,gas exchange and chlorophyll fluorescence were measured and compared. The results showed that maximum net photosynthetic rate(A_(max)),light saturation point(LSP),light compensation point(LCP),dark respiration rate(Rd) and apparent quantum efficiency( AQY) of S.mukorossi were higher than those of M.officinalis subsp. Biloba. Among all gas exchange parameters,stomatal conductance( G_s),intercellular CO_2 concentration( C_i) and transpiration rate(T_r) of S.mukorossi were higher than those of M.officinalis subsp. Biloba,but stomatal limit value( Ls) and water use efficiency(WUE) of S.mukorossi were lower than those of M. officinalis subsp. Biloba. Differences on G_s,C_i and WUE of two tree species were significant,but Lshad no significant difference. Initial fluorescence of( F_o),maximum fluorescence(F_m),non photochemical quenching(qN) of M.officinalis subsp. Biloba were significantly higher than those of S.mukorossi,and its PSII primary energy conversion efficiency( F_v/F_m),PSII actual photochemical efficiency( ΦPSⅡ) and electron transport rate(ETR) were significantly lower than S. mukorossi. There was no significant difference in photochemical quenching( qP) between M.officinalis subsp. Biloba and S.mukorossi. To summarize,M.officinalis subsp. Biloba and S. mukorossi were light preferring plants. The ability to use both high and low light for S.mukorossi were better than that of M.officinalis subsp. Biloba,and shade tolerance and adaptability to environment of S.mukorossi was better than those of M.officinalis subsp. Biloba.

关 键 词：凹叶厚朴 无患子 光合特性 叶绿素荧光参数 

分 类 号：Q945.79[生物学—植物学]