杀菌剂敌磺钠及植物生长调节剂对茭白孕茭的影响

Effects of Fungicide Fenaminosulf and Plant Growth Regulator on Gall Formation of Zizania latifolia

以‘龙茭二号’为研究对象,通过在茭白植株不同生长发育阶段分别喷施杀菌剂敌磺钠和植物生长调节剂,比较分析其对茭白结茭的促进效果。对6个不同处理组合及对照材料的株高、内源激素含量变化及结茭情况的统计分析发现:喷施一定浓度的敌磺钠对茭白结茭具有明显的促进作用,以敌磺钠(标准浓度)+营养液和敌磺钠(标准浓度)对茭白结茭产量的提高最为明显。植物生长调节剂处理能明显促进茭白早期植株生长,但对最终株高影响不大。采用间接酶联免疫法对茭白茎部3种激素(IAA、ABA和GA3)含量进行的比较分析表明:敌磺钠处理能够明显降低ABA含量,但对IAA和GA3含量没有明显影响;茭白结茭前ABA含量的降低可能有助于茭白结茭。

In this research, the promotion of fungicide fenaminosulf and plant growth regulator in the gall formation had been produced by spraying fenaminosulf and plant growth regulator combinations at different growth development phases of Zizania latifolia ＇Longjiao 2＇. After comparative and statistical analyzing of the plant heights, changes of endogenous hormone （IAA, ABA and GA3） in stem and yields of gall formation, it was found that the spraying of fenaminosulf with a certain concentration could significantly promote the yields of gall formation in Z. latifolia, especially the spraying combinations of fenaminosulf （standard concentration） with nutrient solution and fenaminosulf （standard concentration）. The promotions of plant growth regulator were also found, which was related to the different contents of plant growth regulator. Besides, the treatments of plant growth regulator could significantly promote the early growth of plants, but little effect on the final plants height. Using the methods of indirect ELISA, the contents of IAA, ABA and GA3 at the residual part of stem in Z. latifolia were compared and analysed. It was showed that the spraying of fenaminosulf could reduce the contents of ABA obviously, but there were no significant influences on the contents of IAA and GA3. The reduction of ABA before the enlargement of Z. latifolia maybe relate to the yields of gall formation.