3种冷季型草坪草苗期对干旱胁迫的生理响应  

Physiological and ecological responses of three cool-season turfgrasses to drought stress at seedling stage

作　　者：宋娅丽 王莎[2] 王克勤 张倩 马志 陈佳钰 李珠宇 SONG Ya-li;WANG Sha;WANG Ke-qin;ZHANG Qian;MA Zhi;CHEN Jia-yu;LI Zhu-yu(School of Ecology and Soil and Water Conservation,Southwest Forestry University,Kunming 650224,China;School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]西南林业大学生态与水土保持学院,云南昆明650224 [2]北京林业大学水土保持学院,北京100083

出　　处：《草原与草坪》2018年第3期9-16,共8页Grassland and Turf

基　　金：云南省应用基础研究青年项目(2016FD044);西南林业大学科研启动基金(111443);西南林业大学科技创新基金项目(Z16027)资助;云南省高校优势特色重点学科(生态学)建设项目(050005113111);国家林业局生态学重点学科

摘　　要：为研究昆明地区广泛种植的黑麦草(Lolium perenne)、高羊茅(Festuca arundinacea)和早熟禾(Poa pratensis)幼苗的抗旱性,采用盆栽控水试验方法测定了不同时间干旱胁迫下的草坪外观质量(TQ)、叶片萎蔫系数(LWS)、叶片相对含水量(RWC)、地上部分和根系生物量(Bio)3种草坪草根冠比(RS)、叶片光合速率(Pn)、叶片暗呼吸速率(R)、脯氨酸含量(Pro)、细胞膜透性(RC)以及可溶性糖含量(Sol)等生理生态指标。结果表明:随着干旱胁迫时间的持续,高羊茅的TQ、LWC、RWC、Bio和Pn降低的比例显著低于黑麦草和早熟禾,而R、Pro、RC和Sol的增加量显著高于黑麦草和早熟禾。用隶属函数法对试验测定的9个生理生态指标进行综合评价,3种冷季型草坪草幼苗抗旱性表现为:高羊茅>黑麦草>早熟禾。The study was conducted to estimate the drought tolerance of ryegrass（Lolium perenne）,tall fescue（Festuca arundinacea）and Kentucky bluegrass（Poa pratensis）at seedling stage by plot-water control experiment.Different physiological and ecological indices including turf quality,leaf wilting score,leaf relative water content,ratio of root to shoot,leaf photosynthetic rate,leaf dark respiration rate,leaf proline content,relative electrical conductivity rate,and soluble sugar content were measured.The results showed that reduced proportion of turf quality,leaf water score,leaf relative water content,aboveground and root biomass,leaf photosynthesis of F.arundinacea with the duration of drought stress were lower than L.perenne and P.pratensis;increased proportion of leaf respiration,leaf proline content,relative electrical conductivity rate,and soluble sugar content of F.arundinacea were higher than others.According to a comprehensive evaluation of 9 physiological and ecological indices based on subordinate function of fuzzy mathematics,the order of drought resistance of three coolseason turfgrasses at seedling stage was：F.arundinacea〉L.perenne〉P.pratensis.

关 键 词：冷季型草坪草 幼苗 干旱胁迫 生理生态指标 

分 类 号：Q945.78[生物学—植物学] S688.4[农业科学—观赏园艺]