外源脱落酸处理对库尔勒香梨抗寒性的影响  

Effects of exogenous abscisic acid(ABA) on cold resistance of Korla fragrant pear

作　　者：王一静[1] 克热木.伊力 肖坤[1] 

机构地区：[1]新疆农业大学林学与园艺学院,新疆乌鲁木齐830052

出　　处：《经济林研究》2015年第3期13-19,共7页Non-wood Forest Research

基　　金：国家自然科学基金项目(30960234);库尔勒市科技项目;新疆维吾尔自治区果树学重点学科资助项目

摘　　要：为给库尔勒地区香梨安全越冬、稳产和高产的相关研究与栽培实践提供理论依据,以树势健壮、结果正常的库尔勒香梨单株为试验材料,在其生长期(2013年5月6日)第1次对其叶面喷施浓度分别为50、70、90 mg/L的外源激素ABA,之后每隔20天喷施1次,共喷施3次;在其休眠期采集枝条样品,在人工低温胁迫条件下测定其膜透性、丙二醛、脯氨酸、可溶性蛋白质、可溶性糖和淀粉含量等抗寒性指标,并采用隶属函数法对其抗寒性进行了综合评价。结果表明:以50 mg/L的ABA喷施1次的枝条其各生理指标值的平均隶属度>0.6,其抗寒级别可划为Ⅱ级;以70 mg/L的ABA喷施1次和2次及以50 mg/L的ABA喷施2次与3次的枝条,其各生理指标值的平均隶属度均大于0.4,这几个处理的枝条均为中抗寒型,其抗寒级别均可划为Ⅲ级;以90 mg/L的ABA喷施1次和2次的枝条,其各生理指标值的平均隶属度均大于0.3,这两个处理的枝条均为低抗寒型,其抗寒级别均可划为Ⅳ级;以70和90 mg/L的ABA喷施3次的平均隶属度均小于0.3,这两种处理的枝条均为不抗寒型,其抗寒级别均可划为Ⅴ级。文中认为,以50 mg/L的ABA叶面喷施1次,库尔勒香梨便能抵抗-24℃的低温。In order to provide a theory base for correlation researches of safe overwintering, stable and high yield, and cultivation practices of fragrant pear in Korla areas, taking Korla fragrant pear individuals with healthy and strong tree vigor and normally fruiting as materials, exogenous ABA （50, 70, 90 mg/L） was sprayed once every 20 days from growth stage （May 6, 2013）, spraying three times, branches were collected at dormancy period, some cold resistance indexes were determined under artificial conditions of low temperature stress, such as membrane permeability, MDA, proline, soluble protein, soluble sugar and starch contents, and cold resistance was comprehensively evaluated by using the membership function method. The results showed that average membership of each physiological index was more than 0.6 in the treatment of spraying once with 50 mg/L ABA, and cold resistance reached the grade Ⅱ. The average memberships were more than 0.4 in the treatments of spraying once and twice with 70 mg/L ABA and spraying twice and three times with 50 mg/L ABA, and cold resistances were medium and were classed into the gradeⅢ. The average memberships of each physiological index were all more than 0.3 in the treatments of spraying once and twice with 90 mg/L ABA, and cold resistances were low and were classed into the gradeⅣ. The average memberships were less than 0.3 in the treatments of spraying three times with 70 and 90 mg/L ABA, and cold resistances were the lowest and were classed into the gradeⅤ. Korla fragrant peat could resist-24℃after spraying once with 50 mg/L ABA.

关 键 词：库尔勒香梨 外源ABA 枝条 抗寒性 

分 类 号：S661.2[农业科学—果树学]