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首页> 外文期刊>Israel Journal of Plant Sciences >Nitrogen deficiency inhibits cell division-determined elongation, but not initiation, of rice tiller buds
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Nitrogen deficiency inhibits cell division-determined elongation, but not initiation, of rice tiller buds

机译：氮缺乏抑制细胞分裂确定的伸长率，但不引起米饭分蘖芽

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摘要

Plant branching shoot number is strongly influenced by nitrogen (N) supply status. However, detailed descriptions of this phenomenon and the regulatory mechanism are lacking. In this study, we show that, in rice, in comparison to sufficient supply of ammonium sulfate or ammonium nitrate (2.5 or 5 mM N), low N (0.2 mM) or nitrate as the only N source limited shoot branching, i.e., tillering number. We observed that N deficiency did not affect the initiation, but suppressed the elongation of the tiller buds. We carried out in-situ hybridization of the tiller buds and showed that the expression of histone H4, a marker of S-phase in the cell cycle, could not be detected in the tiller buds that had stopped growing, indicating that cell division was suppressed in the tissues. Consistent with this finding, we further detected that the expression of other cell cycle marker genes was decreased in the N-deficient tiller buds in comparison to N-sufficient tiller buds. In addition, expression of the genes involved in the strigolactone pathway was induced in the tiller buds by N deficiency, in accordance with other reports. These results shed light on the importance of proper N application to control tiller bud outgrowth in grain production.
机译：植物分支射击数受氮气（n）供应状况的强烈影响。然而，缺乏对这种现象和监管机制的详细描述。在这项研究中，我们表明，与硫酸铵或硝酸铵（2.5或5mm N）的充分供应相比，低N（0.2mm）或硝酸盐，作为唯一的N次源有限的枝条，即分蘖数字。我们观察到N缺乏不影响启动，但抑制了分蘖芽的伸长。我们对分蘖芽的原位杂交，并且表明组蛋白H4的表达，在细胞周期中的S相标记，不能在停止生长的耕作芽中检测到，表明细胞分裂被抑制在组织中。与该发现一致，我们进一步检测到与N足够的耕作芽相比，N缺陷的耕作芽中，其他细胞周期标记基因的表达降低。此外，根据其他报道，在缺乏症中诱导杂交途径中涉及杂交途径的基因的表达。这些结果阐明了适当的N申请来控制粮食生产中的耕作芽的重要性。

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  • 来源
    《Israel Journal of Plant Sciences》 |2017年第4期|共9页
  • 作者

    Luo Le; Pan Shou; Liu Xiaohong; Wang Hongxuan; Xu Guohua;

  • 作者单位

    Nanjing Agr Univ Coll Resources &

    Environm Sci Nanjing Jiangsu Peoples R China;

    Nanjing Agr Univ Coll Resources &

    Environm Sci Nanjing Jiangsu Peoples R China;

    Nanjing Agr Univ Coll Resources &

    Environm Sci Nanjing Jiangsu Peoples R China;

    Nanjing Agr Univ Coll Resources &

    Environm Sci Nanjing Jiangsu Peoples R China;

    Nanjing Agr Univ Coll Resources &

    Environm Sci Nanjing Jiangsu Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    Nitrogen; tiller bud; cell division; rice; histone H4;

    机译：氮气;分蘖芽;细胞分裂;米;组蛋白H4;

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