Acta Agrestia Sinica

›› 2011, Vol. 19 ›› Issue (2): 227-230,236.DOI: 10.11733/j.issn.1007-0435.2011.02.008

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Observations on Growing Tip Differentiation of Elymus canadensis L.

XU Sheng-de1, YUN Jin-feng1,2,3, ZHAO Yan1,2, ZHANG Miao-miao1   

  1. 1. College of Environment, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia Autonomous Region 010018, China;
    2. Engineering Center of Technical Research on Cultivation and Propagation of Grass Varieties, Huhhot, Inner Mongolia Autonomous Region 010018, China;
    3. Key Laboratory of Grassland Resources(Inner Mongolia Agricultural University), Ministry of Education, Huhhot, Inner Mongolia Autonomous Region 010018, China
  • Received:2010-11-12 Revised:2011-01-09 Online:2011-04-15 Published:2011-04-15

加拿大披碱草生长锥分化的观察

许圣德1, 云锦凤1,2,3, 赵彦1,2, 张苗苗1   

  1. 1. 内蒙古农业大学生态环境学院, 呼和浩特, 010018;
    2. 内蒙古自治区草品种育繁工程技术研究中心, 呼和浩特, 010018;
    3. 草地资源教育部重点实验室, 呼和浩特, 010018
  • 通讯作者: 云锦凤,E-mail:csgrass@vip.163.com
  • 作者简介:许圣德(1984- ),男,山东青岛人,硕士研究生,研究方向为牧草栽培与育种,E-mail:276352785@163.com
  • 基金资助:
    内蒙古草业重大专项(20091401);国家科技支撑计划课题“牧草园缘杂交育种技术研究”(2008BADB3B02)资助

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Abstract: This study reports growing-tip differentiation and development of Elymus canadensis L.using conventional microdissection.Results indicated that the growing-tip differentiation of Elymus canadensis L.was a consecutive process divided into eight stages: vegetative stage,elongation stage,single ridge stage,spikelet protuberances stage,glume protuberances stage,floret differentiation stage,gynoecium and stamen initiation and heading stages.The growing-tip differentiation showed diverse patterns.Jointing and tillering stages develop simultaneously causing growing-tip differentiation overlapped.As a result,heading development was quite irregular causing an extended heading stage.The order of spikelet development was quite regular.The middle and upper parts of main spike developed first then followed,in turn,both top and base.The base spikelet developed last.

Key words: Elymus canadensis.L, Growing tip differentiation, Anatomy

摘要： 为阐明加拿大披碱草(Elymus canadensis L.)生殖生长过程,采用显微镜常规解剖法对加拿大披碱草生长锥分化过程和发育规律进行研究。结果表明:加拿大披碱草生长锥的分化和发育是一个连续过程,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;生长锥分化很不一致,拔节和分蘖几乎同时进行,形成生长锥分化在一定时期相互交错的结果,最后导致抽穗不整齐,致使抽穗时间过长;小穗发育规律性很强,主穗中上部小穗发育最快,然后向上、向下依次进行,基部小穗发育最慢。

关键词: 加拿大披碱草, 生长锥分化, 解剖

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