长穗偃麦草花序分化过程的观察  

Observations on Inflorescence Differentiation of Elytrigia elongata

作　　者：杨金贵[1] 米福贵[1] 闫利军[1] 刘伟伟[1] 伊风艳[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《中国草地学报》2012年第2期47-51,共5页Chinese Journal of Grassland

基　　金：国家科技支撑项目"西北和青藏地区优质牧草丰产栽培及草畜耦合技术集成与产业化示范项目"(2011BAD17B05)

摘　　要：对长穗偃麦草幼穗的分化和发育进行了观察,结果表明,长穗偃麦草幼穗分化是一个持续过程,可分为8个时期:初生期、伸长期、结节期、小穗突起期、颖片突起期、小花突起期、雌雄蕊形成期和抽穗始期。长穗偃麦草幼穗的分化具有很强的规律性:在整个穗上,中上部的小穗最先发育,然后逐渐向上、向下发育,基部的小穗最后发育;在每一小穗上,基部的小花最先发育,然后由基部向上逐渐发育。Inflorescence differentiation process of Elytrigia elongata was observed.The results showed that the young spike differentiation of E.elongata was a consecutive process,it can be divided into eight stages： primary growth stage,elongation stage,single ridge stage,spikelet protuberance stage,glume protuberance stage,floret protuberance stage,gynoecium and stamen differentiation stage,heading stage.The differentiation of spike of E.elongata was very regular： On the whole spike,the middle and upper parts of the spikelet developed first,and then gradually upward and downward,the base spikelet developed last;on the single spikelet,the base part of the floret developed first,then developed from base to top gradually.

关 键 词：长穗偃麦草 花序分化 幼穗分化 

分 类 号：S543[农业科学—作物学] Q948[生物学—植物学]