水分胁迫对幼龄仁用杏叶片光合特性的影响  

Effect of Water on Leaf Photosynthetic Characteristics of Young Kernel-used Apricot Leaf

作　　者：蔡倩[1,2] 孙占祥[1] 郑家明[1] 白伟[1,2] 冯良山[1] 冯晨[1] 

机构地区：[1]辽宁省农业科学院耕作栽培研究所,辽宁省旱作节水工程中心,辽宁沈阳110161 [2]沈阳农业大学土地与环境学院,辽宁沈阳110161

出　　处：《北方园艺》2016年第9期28-32,共5页Northern Horticulture

基　　金：农业部公益性行业科研专项资金资助项目(201103001);国家自然基金面上资助项目(31170407);“十二五”国家科技支撑计划资助项目(2011BAD09B02);辽宁省科技攻关资助项目(2015103018)

摘　　要：以2年生仁用杏为试材,采用盆栽方法,以正常供水(土壤含水量为田间最大持水量的75%)为对照,设置了轻度水分胁迫(55%)、中度水分胁迫(45%)和重度水分胁迫(30%)3个处理,开展了水分胁迫条件下仁用杏叶片光合色素、光合指标及叶绿素荧光参数等光合特性研究。结果表明:水分胁迫不同程度降低了类胡萝卜素含量、叶绿素a、b含量、净光合速率(Pn)、蒸腾速率(Tr)、水分利用效率(WUE)、最大荧光产量(Fm)、最大光化学效率(Fv/Fm)和PSⅡ潜在活性,且下降幅度随着胁迫时间延长而增大;轻度水分胁迫下降幅度很小,中度和重度水分胁迫下降幅度较大。Taking 2-year-old‘Chaoren＇kernel-used apricot as test materials,using pot experiments,under different conditions of soil moisture that normal supply（soil moisture was 75% field water holding capacity）,mild water stress（55%）,moderate water stress（45%）and severe water stress（30%）,photosynthetic pigment,photosynthesis,chlorophyll fluorescence parameters were research.The results showed that carotenoid content,chlorophyll a and b content,net photosynthetic rate（Pn）,transpiration rate（Tr）,water use efficiency（WUE）,maximum fluorescence yield（Fm）,the maximal photochemical efficiency（Fv/Fm）and PSⅡ potential activity were decreased under different soil water treatment.As water stress time increased they fell more faster;mild water stress drop was very small,moderate and severe water stress decreased.

关 键 词：仁用杏 水分胁迫 叶片 光合特性 

分 类 号：Q945.11[生物学—植物学]