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中国农学通报

中国农学通报 ›› 2003, Vol. 19 ›› Issue (4): 57-57.

所属专题： 小麦

• 目次 • 上一篇    下一篇

小麦穗发芽抑制剂—YSR的田间防治和作用机理

付金锋, 王凤宝, 董立峰, 马为民, 李伟   

  • 出版日期:2003-08-25 发布日期:2003-08-25

Studies on Field Prevention of Sprouting depressor-YSR and Its Function Mechanism

Fu Jinfeng， Wang Fengbao， Dong Lifeng， Ma Weimin， Li Wei   

  • Online:2003-08-25 Published:2003-08-25

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摘要： 以穗发芽敏感品种AT265为试材，对本课题组筛选出的YSR纯天然小麦穗发芽抑制剂进行了田间防治；用3，5—二硝基水杨酸比色法，测定了YSR不同浓度处理的种子萌发期间的α–淀粉酶活性。结果表明，收获前2d喷施YSR抑制剂防治效果最佳，穗发芽抑制率可达75.9%，对AT265的种用价值无显著性影响，可作种用。用不同浓度的YSR处理通过休眠的小麦种子，随着浓度的增加，α–淀粉酶活性迅速下降，直至完全失去活性。YSR通过降低α–淀粉酶活性来达到抑制穗发芽的目的。

关键词: 西瓜, 西瓜, 药剂, 幼苗, 生长指标, 生理指标

Abstract: Using sprouting sensitive variety, AT265, the field prevention and cure experiment was undertaken with the natural sprouting depressor -YSR, obtained by the authors. Using colorimetric determination of 3, 5-dinitro-salicylic acid, α-amylase was tested for the seeds treated with different concentration YSR during germination. The results were as follows: the best prevention and cure time of YSR was 2d before harvesting, inhibiting rate was 75.9%, and YSR had no side effect to seed using value. α-amylase content fallen rapidly with increasing of YSR concentration. This proved that YSR could inhibit sprouting through lowering α-amylase during germination in wheat gains.