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.
出处
《中国草地学报》
CSCD
北大核心
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)
关键词
长穗偃麦草
花序分化
幼穗分化
Elytrigia elongata
Inflorescence differentiation
Young spike differentiation
