• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >Architecture of floral branch systems in maize and related grasses
【24h】

Architecture of floral branch systems in maize and related grasses

机译：玉米及相关草中花枝系统的体系结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The external appearance of flowering plants is determined to a large extent by the forms of flower-bearing branch systems, known as inflorescences, and their position in the overall structure of the plant. Branches and branching patterns are produced by tissues called shoot apical meristems. Thus, inflorescence architecture reflects meristem number, arrangement and activity, and the duration of meristem activity correlates with branch length. The inflorescences of maize, unlike those of related grasses such as rice and sorghum, predominantly lack long branches, giving rise to the tassel and familiar corncob. Here we report the isolation of the maize ramosa1 gene and show that it controls inflorescence architecture. Through its expression in a boundary domain near the nascent meristem base, ramosa1 imposes short branch identity as branch meristems are initiated. A second gene, ramosa2, acts through ramosa1 by regulating ramosa1 gene expression levels. ramosa1 encodes a transcription factor that appears to be absent in rice, is heterochronically expressed in sorghum, and may have played an important role in maize domestication and grass evolution.
机译：开花植物的外观在很大程度上取决于带花的分支系统（称为花序）的形式及其在植物总体结构中的位置。分支和分支模式是由称为茎尖分生组织的组织产生的。因此，花序结构反映了分生组织的数目，排列和活性，而分生组织活动的持续时间与分支长度相关。玉米的花序与水稻和高粱等相关草不同，主要缺少长枝，从而产生了流苏和熟悉的玉米芯。在这里，我们报告了玉米ramosa1基因的分离，并表明它控制了花序结构。通过在新生分生组织基部附近的边界域中表达，ramosa1在启动分支分生组织时强加短分支身份。第二个基因ramosa2通过调节ramosa1基因表达水平，通过ramosa1起作用。 ramosa1编码在水稻中似乎不存在的转录因子，在高粱中异时表达，并且可能在玉米驯化和草的进化中发挥了重要作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号