华北农学报 ›› 1997, Vol. 12 ›› Issue (4): 42-47. doi: 10.3321/j.issn:1000-7091.1997.04.009

所属专题: 小麦

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小麦穗粒数的调节 Ⅱ开花前遮光对穗碳水化合物代谢和内源激素水平的影响

王志敏, 王树安, 苏宝林   

  1. 中国农业大学农学院, 北京 100094
  • 收稿日期:1996-01-15 出版日期:1997-12-28

Regulation of Grain Number in Wheat Ⅱ Effects of Shading on Carbohydrate Metabolism and Hormone Levels in Spikes before Anthesis

Wang Zhimin, Wang Shu'an, Su Baolin   

  1. Department of Agronomy, Chinese Agricultural University, Beijing 100094
  • Received:1996-01-15 Published:1997-12-28

摘要: 在小麦开花前16~8d和开花前8d至开花期进行遮光处理(遮光率70%~80%)分别使穗粒数减少了37%和23%.在处理期间,遮光穗的还原糖(葡萄糖+果糖)和果聚糖浓度显着低于对照穗,而蔗糖浓度与对照差异较小。遮光处理降低了穗中蔗糖-蔗糖果糖基转移酶(SST)和可溶性酸性转化酶(AI)的活性。分析穗器官吲哚乙酸(IAA)、玉米素/玉米素核苷(Z/ZR)和脱落酸(ABA)含量表明,遮光处理对穗中IAA和Z/ZR水平没有明显影响,但显着提高了穗中ABA水平。这些结果暗示,遮光限制了同化物供给,也限制了穗库对同化物的转化和利用;穗库活性的下降可能与ABA水平的上升有关。

关键词: 小麦, 穗粒数, 碳水化合物, 激素, 遮光

Abstract: Shading treatments (70~80% light) in 16-8 days and 8-0 days before anthesis decreased grain numbers of wheat spike by 36% and 22%, respectively. The concentrations of reducing sugar and fructan and the activities of sucrose sucrose fructosyltransferase(SST) and soluble acid invertase(AI) were lower in shaded spikes than that in unshaded spikes.Shading did not alter the levels of indoleacetic acid and zeatin/zeatin riboside,but increased the level of abscisic acid (ABA) in the spikes. It is suggested that source limiting could decrease sink ability of wheat spike in using assimilates, maybe,through a influence on the ABA level of spike.

Key words: Wheat, Grain number, Carbohydrate, Hormones, Shading

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引用本文

王志敏, 王树安, 苏宝林. 小麦穗粒数的调节 Ⅱ开花前遮光对穗碳水化合物代谢和内源激素水平的影响[J]. 华北农学报, 1997, 12(4): 42-47. doi: 10.3321/j.issn:1000-7091.1997.04.009.

Wang Zhimin, Wang Shu'an, Su Baolin. Regulation of Grain Number in Wheat Ⅱ Effects of Shading on Carbohydrate Metabolism and Hormone Levels in Spikes before Anthesis[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1997, 12(4): 42-47. doi: 10.3321/j.issn:1000-7091.1997.04.009.

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