南疆3个软籽石榴品种抗寒性比较

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中图分类号：S665.4 文献标识码：A

Comparison of Cold Resistance in Three Soft-seed Pomegranate Cultivars from Southern Xinjiang

BAO Yaqi， BAI Ru* ，HUANG Xinyu，XIAO Xiong，MA Sheng，DIAO Ming （College of Agriculture，KeyLaboratoryofCultivation Physiologyand GermplasmResources Utilizationof Featured Fruits and Vegetables of Xinjiang Production and Construction Corps，Shihezi University，Shihezi Xinjiang 8320o3，China）

Abstract：【Objective】Toaddressthe issueofwinter freezing injury insoft-seed pomegranates in Southern Xinjiang，this studydeterminedthephysiologicalandbiochemical indices relatedtocoldresistanceofthree maincultivatedpomegranate varieties，clarifiedthedifferencesincoldhardinessamongthethreevarieties，ndtherebyprovidedascientificbasisfortheindustrial layoutof thepomegranate industryinSouthern Xinjiang.【Methods】Takingthreesoft-sed pomegranatecultivars，Tunisian Soft-seed，MuleandBlack-SeedSweet，cultivatedinTumushukeastest materials，with theironeyearolddormantbranchesas experimental samples，anartificial simulatedlow-temperature environment method was adopted.Thechanges in physiological andbiochemicalindices related tocoldresistanceoftebranchesofthethre soft-seedpomegranatevarietieswere measuredunder low-temperature conditions of 4∘C （ CK） ， 0°C ， -5∘C ， -10∘C and -15∘C . The cold hardiness of the three varieties was comprehensively evaluated by combining the Logistic equation （for LT50 calculation） and the membership function method.【Results】The relative electricalconductivityandmalondialdehyde（MDA）contentof theone-year-old branches of Mule andBlack-See Swet werelower thanthoseofTunisian Soft-seed.Onthecontrary，thecontents of soluble proteinand proline，as wellassuperoxidedismutase（SOD）activityof Tunisian Soft-seed were the lowest，whilethoseofMuleandBlackSeed Sweet were relativelyhigher.Comprehensiveanalysisbythe membershipfunction methodbasedonmultiplephysiological indicesshowedthattheorderofcold hardinessof thethreesoft-seedpomegranatevarietiesfrom strongestto weakest was： Black-Seed Sweet > Mule > Tunisian Soft-seed. 【Conclusion】 The results of this study provide important scientific basis and practical guidance for the development of the soft-seed pomegranate industry in Southern Xinjiang.

Key words：soft-seed pomegranate；cold resistance;low-temperature stress；membership function method

石榴（PunicagranatumL.）为石榴科石榴属[1]，是一种兼具经济与生态价值的亚热带落叶灌木或小乔木，在全球范围内被广泛栽培，喜温暖湿润的气候环境，耐贫瘠，但不耐严寒[2]。（剩余6358字）