中国农业科学 ›› 2004, Vol. 37 ›› Issue (10): 1517-1520 .

• 园艺 • 上一篇    下一篇

白光下光敏素对番茄幼苗胚轴长度、花青素含量及开花的控制

陈静,陈启林   

  1. 西北农林科技大学生命科学学院
  • 收稿日期:2003-10-09 修回日期:2004-01-16 出版日期:2004-10-20 发布日期:2004-10-20
  • 通讯作者: 陈静

Phytochrome Control of Hypocotyl Length, Anthocyanin Biosynthesis and Inflorescence Initiation of Tomato Plants Grown Under White Light

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  1. 西北农林科技大学生命科学学院
  • Received:2003-10-09 Revised:2004-01-16 Online:2004-10-20 Published:2004-10-20

摘要: 以番茄野生型(WT)和光敏素突变体phyA、phyB1、phyB2、phyB1phyB2和phyAphyB1phyB2为材料,研究了光敏素PHYA、PHYB1和PHYB2对番茄幼苗胚轴生长、花青素含量以及植株开花时间的影响。结果表明,白光下光敏素PHYA、PHYB1和PHYB2对番茄幼苗胚轴伸长和花青素合成的影响不同。PHYB1对胚轴伸长具有明显的抑制作用,同时促进花青素的合成。PHYA和PHYB2对胚轴伸长和花青素合成的影响程度较小,但是与PHYB1具有明显的互作效应。双突变体phyB1phyB2的首花节位和开花时间明显提前,三突变体phyAphyB1phyB2的第1~4 花序生长早期即停滞,花序极其微小。

关键词: 番茄, 光敏素, 胚轴, 花青素, 开花

Abstract: The wild type(WT) tomato and phytochrome mutants phyA, phyB1, phyB2, phyB1phyB2 and phyAphyB1phyB2 were used to study the effects of phytochrome on hypocotyl length, anthocyanin content and inflorescence initiation time. The results indicated that hypocotyl length and anthocyanin biosynthesis varied with phytochrome mutants. PHYB1 significantly inhibited hypocotyl elongation, but promoted anthocyanin biosynthesis. PHYA and PHYB2 showed relatively small influence on the two traits. However, PHYA and PHYB2 obviously interacted with PHYB1 to control hypocotyl elongation and anthocyanin biosynthesis. Double mutant phyB1phyB2 significantly promoted inflorescence initiation. The 1-4th inflorescences of triple mutant phyAphyB1phyB2 aborted at its early developmental stage, and resulted in extremely tiny ones.

Key words: Tomato, Phytochrome, Hypocotyl, Anthocyanin, Inflorescence initiation