作 者：
古丽江·许库尔汗;孙雅丽;巴哈尔古丽·阿优甫;哈尔肯·叶尔江;阿依古丽·铁木儿
关键词：
醋栗;干旱胁迫;生理生化指标;抗旱性评价
摘 要：
[目的]分析醋栗(Gooseberry)幼苗叶片对干旱胁迫的光合生理生化响应,为小浆果果树抗旱育种提供理论依据.[方法]采用盆栽自然干旱法控水模拟干旱,对彩虹、坠玉和红灯笼3个醋栗品种的2年生苗进行4个梯度胁迫处理(CK、土壤水含量35%、30%和25%),分析各处理的可溶性糖(SS)、脯氨酸(Pro)和丙二醛(MDA)含量、相对电导率(REC)及超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性,运用主成分分析法对其抗旱性进行综合评估.[结果]干旱胁迫导致3个醋栗品种的净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)和水分利用效率(WUE)不同程度下降,胞间CO2浓度(Ci)上升,其中坠玉和红灯笼的WUE下降较明显,彩虹和红灯笼的Gs显著下降(P<0.05,下同).随干旱胁迫程度的加剧,坠玉、彩虹和红灯笼的SS、Pro、MDA含量和REC均显著增加;坠玉和彩虹的POD活性在重度干旱胁迫时保持较高水平;3个醋栗品种的SOD活性均降至低于CK水平;中度和重度干旱胁迫时红灯笼的CAT活性最高,其次为坠玉.主成分分析结果表明,3个醋栗品种的抗旱性排序为彩虹(1.886)>坠玉(-0.289)>红灯笼(-1.596).[结论]醋栗品种彩虹、坠玉和红灯笼的光合和生理生化指标对干旱胁迫均表现出明显的响应,但对干旱胁迫的耐受能力和适应能力存在差异,其抗旱性排序为彩虹>坠玉>红灯笼.
译 名：
Photosynthetic physiological and biochemical responses of gooseberry leaves to drought stress
作 者：
Gulijiang·Xukuerhan;SUN Ya-li;Bahaerguli·Ayoufu;Haerken·Yeerjiang;Ayiguli·Tiemuer;Xinjiang Academy of Forestry Sciences;
关键词：
gooseberry;;drought stress;;physiological and biochemical indicators;;drought resistance evaluation
摘 要：
【Objective】The photosynthetic physiological and biochemical responses of gooseberry seedlings to drought stress were analyzed to provide theoretical basis for drought resistance breeding of small berries.【Method】Four gradient stress treatments(CK,soil water content 35%,30% and 25%)were carried out on two-year-old seedlings of Caihong,Zhuiyu and Hongdenglong gooseberry varieties using potted natural drought control water simulation drought. Analysis of soluble sugar(SS),proline(Pro),malondialdehyde(MDA)contents,relative conductivity(REC)and superoxide dismutase(SOD)activity,peroxidase(POD)activity and catalase(CAT)activity,under drought stress were conducted,and its drought resistance was comprehensively evaluated using principal component analysis.【Result】Drought stress resulted in net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductanc(Gs)and water use efficiency(WUE)of three varieties of gooseberry decreased to varying degrees,intercellular CO2 concentration(Ci)of the leaves of the three varieties increased and the WUE of Zhuiyu and Hongdenglong decreased greatly,Caihong and Hongdenglong leaves Gsdecreased significantly(P<0.05,the same below).With the increase of drought stress,the SS,Pro,MDA and REC of Zhuiyu,Caihong and Hongdenglong leaves increased significantly. The POD activity of leaves of Zhuiyu and Caihong remained high under severe drought stress. The SOD activity of three varieties of gooseberry decreased to below CK level and the CAT activity of Hongdenglong was the highest in medium and severe drought stress followed by Zhuiyu. Principal component analysis showed that the drought resistance of the three varieties of gooseberry was Caihong(1.886)>Zhuiyu(-0.289)>Hongdenglong(-1.596).【Conclusion】The three varieties of gooseberry show obvious response to drought stress in photosynthesis,physiology and biochemistry indicators,but their drought resistance and adaptability are different. Their drought resistance order is Caihong>Zhuiyu>Hongdenglong.
