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1、麦类作物学报2008,28(5):804-810JournalofTriticeaeCrops直链淀粉检测仪http://www.grainyq.com/product/854.html小麦胚乳小淀粉粒是复粒淀粉的结构观察*11223韦存虚,张军,周卫东,陈义芳,许如根(1.扬州大学生物科学与技术学院,江苏扬州225009;2.扬州大学测试中心,江苏扬州225009;3.扬州大学农学院,江苏扬州225009)摘要:为了查明小麦胚乳淀粉粒是单粒淀粉还是复粒淀粉,利用电子显微镜技术系统观察了小麦胚乳发育过程中淀粉粒的发育过程。结果表明,大淀粉粒在胚乳发育早期发生与发育
2、,包含大淀粉粒的淀粉体通过缢缩进行增殖,每个淀粉体只包含一个大淀粉粒;小淀粉粒在胚乳发育的中、后期发生与发育,包含大淀粉粒的淀粉体被膜向细胞基质突起,出芽产生许多淀粉体,小淀粉粒在这些淀粉体内发生与发育;包含小淀粉粒的淀粉体也可以通过缢缩或被膜外突出芽产生新淀粉体,用来形成小淀粉粒;多个小淀粉粒可以同时在一个淀粉体内发生与发育;当淀粉体被淀粉粒所充满,淀粉体被膜降解消失,释放淀粉粒到细胞基质中。上述结果表明,小麦胚乳大淀粉粒为单粒淀粉,而小淀粉粒为复粒淀粉。关键词:小麦;胚乳;淀粉体;复粒淀粉中图分类号:S512.1;S311文献标识码:A文章编号:1009-10
3、41(2008)05-0804-07UltrastructuralObservationontheDevelopmentofSmallStarchGranule(CompoundStarchGranule)ofWheatEndosperm11223WEICun-xu,ZHANGJun,ZHOUWe-idong,CHENY-ifang,XURu-gen(1.CollegeofBioscienceandBiotechnology,YangzhouUniversity,Yangzhou,Jiangsu225009,China;2.CenterofMeasurement,
4、YangzhouUniversity,Yangzhou,Jiangsu225009,China;3.AgriculturalCollege,YangzhouUniversity,Yangzhou,Jiangsu225009,China)Abstract:Inordertoinvestigatewhetherstarchgranulesofwheatendospermweresinglestarchgran-ulesorcompoundstarchgranules,whichwouldbehelpfultocultivatenewwheatvariety,thede
5、ve-lopmentofstarchgranulewasobservedusingelectronmicroscopyduringwheatendospermdevelop-ment.Theresultsshowedthatlargestarchgranulesformedanddevelopedattheyoungstageofendo-spermdevelopment.Amyloplastwithlargestarchgranulescouldproducenewamyloplastbythewayofconstricting.Oneamyloplasthad
6、onlyonelargestarchgranule.Smallstarchgranulescouldformanddevelopatthemiddleandlatestageofendospermdevelopment.Manyamyloplastswhichwouldproducesmallstarchgranulescamefromtheenvelopeprotrusionofamyloplastwithlargestarchgran-ules.Amyloplastswithsmallstarchgranulescouldalsoformnewamylopla
7、ststoproducesmallstarchgranulesbythewayofconstrictingandprotrudingoftheirenvelopes.Manysmallstarchgranulescouldformanddevelopinoneamyloplast.Theamyloplastenvelopebegantodegradeandreleasedstarchgranulesintocellmatrixwhenamyloplastwasfullofstarchgranules.Theaboveresultsshowedthatlargest
8、archg
