【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。更多还原

【Abstract】 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.更多还原