Subtropical Plant Science ›› 2018, Vol. 47 ›› Issue (1): 8-12.DOI: 10.3969/j.issn.1009-7791.2018.01.002

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Effects of Brassinosteroids on Germination and Seedling Growth of Aged Rice Seed

CHEN Liang-liang,LI Mo-li,LUO Wei-gui,LIU Qing,SU Yi,XIAO Lang-tao   

  1. (Hunan Provincial Key Laboratory of Phytohormones and Growth Development, Hunan Agricultural University, Changsha 410128, Hunan China)
  • Received:2017-08-23 Revised:2017-11-10 Online:2018-03-30 Published:2018-03-30
  • Contact: XIAO Lang-tao

芸苔素对陈化水稻种子萌发和幼苗生长的影响

陈靓靓,李茉莉,罗为桂,刘清,苏益,肖浪涛   

  1. (湖南农业大学植物激素与生长发育湖南省重点实验室,湖南 长沙 410128)
  • 通讯作者: 肖浪涛
  • 作者简介:陈靓靓,硕士研究生,从事植物生理学研究。
  • 基金资助:

    国家自然科学基金项目(31570372);湖南省自然科学基金项目(2016JJ2065)

Abstract: With aged seeds of Zhuliangyou 819, an early season hybrid rice, as material, the effects of brassinosteroids on aged seed activity and seedling growth of rice were carried out. The results showed that brassinolide treatment restored the vigor of the aged seeds in a certain degree. In comparison with the control, both the seed-soaking treatments with brassinolide prior to germination and the brassinolide treatment after germination significantly increased the germination potential and germination rate of aged rice seeds, resulting in shorter germinating time. From the prospective of seedling growth, the seed-soaking treatment with brassinolide prior to germination remarkably promoted the germ outgrowth and the radicle elongation, by improving uniform seedling growth. Brassinolide treatment after germination played a positive role in the radicle growth but an inhibitive role in germ growth.

Key words: brassinolide, aged seed, seed soaking, germination, radicle growth

摘要: 以杂交早稻品种株两优819的陈化种子为试材,探讨芸苔素对水稻种子萌发和幼苗生长的影响。结果表明,芸苔素内酯处理对恢复陈化种子活力有一定的效果,芸苔素内酯浸种与催芽处理均能显著提高陈化水稻种子的发芽势和发芽率,缩短萌发所需时间;芸苔素内酯浸种能显著促进胚芽发生和胚根伸长,促进齐苗;芸苔素内酯催芽处理对胚根伸长也有促进作用,但对胚芽生长有一定的抑制作用。

关键词: 芸苔素内酯, 种子陈化, 浸种, 种子萌发, 胚根生长

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