不同水分条件下小叶章光响应曲线变化  

Light-response Curve of Calamagrostis Angustifolia Under Different Water Conditions

作　　者：王建波[1] 付晓玲[1] 刘赢男[1] 倪红伟[1] Wang Jianbo;Fu Xiaoling;Liu Yingnan;Ni Hongwei(Institute of Nature and Ecology, Heilongjiang Academy of Sciences, Harbin 150040, China)

机构地区：[1]黑龙江省科学院自然与生态研究所,哈尔滨150040

出　　处：《黑龙江科学》2022年第2期16-18,共3页Heilongjiang Science

基　　金：国家自然科学基金“三江平原小叶章湿地凋落物调节土壤温室气体排放功能对CO2浓度升高的响应”(31570485);黑龙江省科学院预研项目“三江平原小叶章湿地碳固定与释放对CO2浓度升高的适应机制”(YY2021ZR02)。

摘　　要：为揭示三江平原湿地小叶章(Calamagrostis angustifolia)在不同水分条件下的光合生理特征,采用盆栽控制实验,比较了小叶章在5种水分处理下的光合光响应曲线特征。结果表明,模拟典型草甸(TM)、沼泽化草甸(WM)小叶章最大净光合速率(A_(max))和表观量子效率(AQY)较高,并且保持较高的光饱和点(LSP),说明适量的水分有利于提高小叶章对光照的适应能力和光合潜力。模拟沼泽(M)、极度干旱(ED)和极度淹水(EF)胁迫条件下,小叶章A_(max)和AQY显著下降,表明干旱和水淹胁迫条件下均降低了小叶章的光合能力。In order to study the photo-physiological characteristics of Calamagrostis angustifolia under different water conditions,the photosynthesis-light response curves(P_(n)-PAR)were determined under potted conditions with five kinds water treatment.Results indicate that TM treatment,WM treatment improved maximum net photosynthetic rate(A_(max))and apparent quantum yield(AQY)are relatively high,and light saturation point(LSP)maintained higher,which enhances the ability to light adaptation and increases the potential photosynthesis of Calamagrostis angustifolia.M,ED and EF treatment significantly decreases A_(max) and AQY,which suggest that the drought and flooding stress reduces the ability to photosynthesis of Calamagrostis angustifolia.

关 键 词：小叶章 光响应曲线 水分处理 

分 类 号：Q945[生物学—植物学] S792[农业科学—林木遗传育种]