云南松幼苗对水分胁迫的生理响应  

The Physiological Responses of Pinus yunnanensis to Water Stress

作　　者：蔡年辉[1] 张瑞丽[1] 陈诗[1] 白青松[1] 许玉兰[1] 

机构地区：[1]西南林业大学西南山地森林保育与利用省部共建教育部重点实验室,云南昆明650224

出　　处：《云南农业大学学报》2013年第2期247-250,共4页Journal of Yunnan Agricultural University

基　　金：云南省教育厅科学研究基金项目(2011Y277);云南省教育厅重点项目(2010Z042)

摘　　要：以云南松2年生幼苗为试验材料进行盆栽控水试验,研究了幼苗对干旱胁迫的生理响应。结果表明:随着胁迫时间的增加,叶片相对含水量、叶绿素a,叶绿素b,类胡萝卜素和叶绿素含量先降低后升高,叶绿素a/b,PSⅡ最大光能转化效率(Fv/Fm),PSⅡ的潜在活性(Fv/Fo)均呈现下降的趋势。对不同胁迫下的生理指标的变化进行比较,说明云南松具有一定的耐旱性,重度干旱胁迫会严重损伤云南松。The physiological responses of Pinus yunnanensis 2-year-old seedlings to drought stress were studied in the potted water control tests.The results showed that: the relative water content,the content of Chl a,Chl b,carotenoid and total chlorophyll were firstly increased and then decreased,and the Chl a/b,maximal quantum yield of PSⅡ(Fv/Fm) and the potential activities of PSⅡ(Fv/Fo) decreased with the increase of stress intensity and prolonging duration.According to the physiological parameters under drought stress,P.yunnanensis grew normally under moderate drought stress and it would be damaged under severe drought stress.

关 键 词：云南松 水分胁迫 生理响应 

分 类 号：S791.257[农业科学—林木遗传育种]