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作物学报 ›› 2010, Vol. 36 ›› Issue (09): 1596-1604.doi: 10.3724/SP.J.1006.2010.01596

• 研究简报 • 上一篇    下一篇

不同种植密度下兰考矮早八茎蘖叶片内源激素差异及其与分蘖成穗的关系

徐丽娜1,2,冯伟1,**,盛坤1,3,朱云集1,马冬云1,郭天财1,*   

  1. 1河南农业大学/国家小麦工程技术研究中心, 河南郑州450002; 2中国农业大学农学与生物技术学院, 北京100193; 3新乡市农业科学院, 河南新乡 453000
  • 收稿日期:2009-12-29 修回日期:2010-04-21 出版日期:2010-09-12 网络出版日期:2010-07-05
  • 通讯作者: 郭天财, E-mail: tcguo888@sina.com; Tel: 0371-63558201
  • 基金资助:

    本研究由国家科技支撑计划（2006BAD02A07）和现代农业（小麦）产业技术体系（MATS）专项经费资助。

Difference of Endogenous Hormones in Leaves between Main Stem and Tillers and Its Effect on Spike Formation in Large Spike Winter Wheat Cultivar LanKao Aizao 8 under Different Plant Densities

XU Li-Na1,2,FENG Wei1,**,SHENG Kun1,3,ZHU Yun-Ji1,MA Dong-Yun1,GUO Tian-Cai1,*   

  1. 1 National Engineering Research Center for Wheat/Henan Agricultural University, Zhengzhou 450002, China; 2 College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; 3 Xinxiang Academy of Agricultural Sciences, Xinxiang 453000, China
  • Received:2009-12-29 Revised:2010-04-21 Published:2010-09-12 Published online:2010-07-05
  • Contact: GUO Tian-Cai,E-mail:tcguo888@sina.com; Tel: 0371-63558201

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1637

被引次数

19

摘要： 在不同种植密度下，于拔节期前后测定兰考矮早八主茎和一级分蘖的第一分蘖(分蘖I)和第二分蘖(分蘖II)各时期上部第一片完全展开叶内吲哚乙酸(IAA)、玉米素核苷(ZR)和脱落酸(ABA)含量。结果表明，叶片内IAA和ZR含量表现为主茎>分蘖I>分蘖II，其分蘖与主茎的差距在拔节前期开始加大；叶片内ABA含量表现为分蘖>主茎，其差距开始加大的时期比其他激素晚6~12 d。各激素含量在主茎与分蘖间的差距随密度的增大而增加，且差距达到一定程度时导致分蘖衰亡。激素间平衡与分蘖成穗关系更为密切，分蘖叶片中IAA/ABA和ZR/ABA比值低不利于分蘖最终成穗。激素含量比值在分蘖和主茎叶片中出现差距的时间要早于单一激素含量在分蘖与主茎中出现差距。与单个激素含量相比，激素之间的平衡以及分蘖与主茎激素平衡的差距可能与分蘖成穗的关系更为密切。分蘖中IAA/ABA和ZR/ABA比值占主茎中相应比值的比例可使判断成穗蘖和衰亡蘖出现差距的时间提前至二棱末期，比单一激素含量判断提前6~22 d。

关键词: 冬小麦, 大穗型品种, 内源激素, 激素平衡, 分蘖成穗

Abstract: Contents of indoleacetic acid (IAA), zeatin riboside (ZR), and abscisic acid (ABA) were determined in the first fully expanded leaves of the first and the second tillers, and the main stem of Lankao Aizao 8 under different planting densities. The contents of IAA and ZR were higher in the main stem than in tillers, and the content of ABA was higher in tillers than in the main stem. The time of initiated increasing for content differences between the main stem and tillers was since early jointing stage for IAA and ZR and 6 to 12 d later for ABA. These differences on hormone contents enhanced with the growing of planting density, leading to senescence of tillers ultimately. Compare with single hormone content, the balance of endogeneous hormones was more important for the formation of spike in tillers. The leaf ZR/ABA value and tiller/stem ratio for IAA/ABA and ZR/ABA made the judgment for the critical period of tiller senescence and development advanced to double-ridge telophase, and 6 to 22 d earlier than that based on single hormone content.

Key words: Winter wheat, Large spike-type, Endogenous hormones, hormone balance, Formation of spike in tillers

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