β-淀粉酶活性与秋甘薯干物质积累相关性研究

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关键词甘薯;β-淀粉酶;干物质积累;块根中图分类号S531文献标识码A文章编号 0517-6611（2025）14-0041-04doi：10.3969/j.issn.0517-6611.2025.14.008

开放科学（资源服务）标识码（OSID）：

CorrelationBetween ββ -amylaseActivityandDryMatter Accumulationin Autumn SweetPotato

ZHOUQuan-lu，LIDong-bo，LI Shengetal（Nanchong AcademyofAgricultural Sciences/Nanchong Branchof NationalCenterof Sweet-potato Genetics Improvement，Nanchong，Sichuan 637000）

Abstract[Objective] The aim is to study the relationship between β -amylase activity intensity and dry mattr accumulation in sweet potato storageroots，ichnproideceaitoretcalbasisdpractcalasisfseetpotatoreedingadulivatioMethdpmentwascariedoutieLuxiExperimntalBaseofancongAcademyofgriculturalSienesinDiferentsofsweetotatoterials（dry rate and yield）were used，according to the dry rate grade（high dry ⩾32.00% ; medium dry ⩾28.00%-<32.00% ; low dry < （204号 28.00% ）and yield grade （high yield， ⩾37.5Vhm2 ; middle yield， ; low yield， <30.0t/hm2 ），12 different sweet potato varieties were divided into 9 types to study the change of β -amylase activity in various types of sweet potato tubers at different periods and its relationshipwithdrymateraccuulationofstem，leafandstoragerots.Result]5Odaysaferplanting，underhightemperaturend drought， β -amylaseactivitywasatthefistpeak，andthedrymatersynthesized wasusedtoresisthightemperatureanddroughtandshoot growth.When the storage roots start to expand in the middle of growth β -amylase activity was at a low level，under the rainy conditions at the later harvest β -amylase activity was high.[Conclusion] β -amylase activity is higher in the early and late stages of sweet potato growth，and lowernthemidlestage.Tereiscertainnegativecorelationbetwenamlaseactivityandtheexpansionofprodutorgansadstorage roots.

Key wordsSweet potato; β -amylase;Dry matter accumulation;Storage roots

甘薯（IpomoeabatatasL.）是我国第四大粮食作物，我国是世界甘薯产量最高的国家，据联合国粮食及农业组织（FAO）统计数据显示，2018年我国甘薯总产量占世界的57%[1] 。（剩余6418字）