小麦穗发芽抑制剂—YSR的作用机理和田间施用效果  

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

作　　者：付金锋[1] 王凤宝[1] 董立峰[1] 马为民[1] 李伟[1] 

机构地区：[1]河北职业技术师范学院农学系,昌黎066600

出　　处：《中国农学通报》2003年第4期57-59,共3页Chinese Agricultural Science Bulletin

基　　金：河北职业技术师范学院青年基金项目

摘　　要：以穗发芽敏感品种AT 2 6 5为试材 ,对筛选出的YSR纯天然小麦穗发芽抑制剂进行了田间喷施 ;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抑制剂效果最佳 ,穗发芽抑制率可达 75 9%,对AT 2 6 5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。Using sprouting sensitivevariety, 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.

关 键 词：小麦 穗发芽抑制剂 YSR 作用机理 田间施用效果 浓度 α—淀粉酶活性 

分 类 号：S512.1[农业科学—作物学]