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作物学报 ›› 2009, Vol. 35 ›› Issue (10): 1893-1899.doi: 10.3724/SP.J.1006.2009.01893

• 耕作栽培·生理生化 • 上一篇    下一篇

氮素和6-BA对水稻分蘖芽发育的影响及其生理机制

刘杨，王强盛，丁艳锋，刘正辉，李刚华，王绍华*   

  1. 南京农业大学农学院/农业部南方作物生理生态重点开放实验室，江苏南京210095
  • 收稿日期:2009-03-23 修回日期:2009-06-25 出版日期:2009-10-12 网络出版日期:2009-08-07
  • 通讯作者: 王绍华,E-mail:wangsh@njau.edu.cn; Tel:025-84396475
  • 基金资助:

    本研究由国际科技支撑计划项目（2006BAD02A03）和国家自然科学基金项目（30871482）资助。

Effect of Nitrogen and 6-BA on Development of Tillering Bud and Its Physiological Mechanism

LIU Yang,WANG Qiang-Sheng,DING Yan-Feng,LIU Zheng-Hui,LI Gang-Hua,WANG Shao-Hua*   

  1. Agronomy College，Nanjing Agricultural University/Key Laboratory of Crop Physiology & Ecology in Southern China，Ministry of Agriculture，Nanjing 210095，China
  • Received:2009-03-23 Revised:2009-06-25 Published:2009-10-12 Published online:2009-08-07
  • Contact: WANG Shao-Hua,E-mail:wangsh@njau.edu.cn; Tel:025-84396475

PDF

2839

被引次数

26

摘要：

以扬稻6号、南粳44为材料，研究了氮素和6-BA对水稻分蘖芽萌发的影响及分蘖芽萌发过程中碳氮代谢和细胞分裂素含量的变化。结果表明，氮素和6-BA都能促进分蘖芽的萌发，但二者维持分蘖芽进一步生长的能力存在明显差异，氮素能够促进分蘖芽持续生长，而6-BA是无法维持分蘖芽的持续生长。氮素和6-BA均提高了分蘖节中细胞分裂素(Z+ZR和iP+iPR)含量及叶、根中硝酸还原酶(NR)活性，但6-BA处理无法提高水稻植株体内可溶性蛋白含量及氮素和非结构性碳水化合物的积累，使水稻植株体内营养物质积累不足。这说明，氮素和细胞分裂素通过内源激素平衡和碳氮代谢两条生理途径调控分蘖发生。

关键词: 水稻, 分蘖芽, 发育, 氮素, 6-BA

Abstract:

Tiller number is a major factor affecting rice yield, nitrogen and cytokinin have substantial regulative effect on tillering of rice. However, little is known on the mechanism of nitrogen and cytokinin regulating tillering bud growth and on the relationship of them during this process. In this study, two rice cultivars (Yangdao 6 and Nanjing 44) were used to investigate the effect of nitrogen and cytokinin on the regulation in tillering bud growth and the changes of nitrogen, carbon and cytokinins in plant during this process. The results showed that both nitrogen and cytokinin promoted the germination of tillering bud, but there was a significant difference in the effect of them on the subsequent outgrowth, nitrogen promoted both germination and outgrowth of tillering bud, however, cytokinin only promoted tillering bud’s germination. Both nitrogen and 6-BA significantly increased cytokinin (Z+ZR and iP+iPR) content in tillering node and promoted activity of nitrate reductase (NRA) in leaf and root, but 6-BA couldn't significantly increase the content of soluble protein, nitrogen and non structural carbohydrate (NSC) in plant. In conclusion, nitrogen and 6-BA may regulate tiller production by two approaches, one is the promotion of endogenous hormones balance and the other is the controlling of carbon and nitrogen metabolism.

Key words: Rice, Tillering bud, Development, Nitrogen, 6-BA

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