冠菌素对玉米苗期植株形态建成的调控效应  

Regulation of bioregulator coronatine on the development of plant morphology in maize seedling

作　　者：王庆燕[1] 李建民[1] 段留生[1] 张明才[1] 李召虎[1] 

机构地区：[1]植物生长调节剂教育部工程研究中心/中国农业大学农学与生物技术学院,北京100193

出　　处：《农药学学报》2015年第4期401-408,共8页Chinese Journal of Pesticide Science

基　　金：国家高技术研究发展计划(863计划)项目(2011AA10A206)

摘　　要：以玉米品种金海5号为材料,采用不同浓度植物生长调节剂冠菌素(COR)拌种和三叶期(V3)叶面喷施的方法,研究了COR对玉米苗期植株地上部和根系形态建成的影响,分析了其对叶面积、叶绿素含量和可溶性蛋白的调控效应。结果表明:不同浓度冠菌素对玉米幼苗形态建成的调控呈单峰曲线,即低浓度下促进幼苗生长,高浓度下抑制生长。用0.1 mg/L的COR拌种或叶面喷施处理,可促进玉米苗期植株株高和茎粗生长,增加单株叶面积,提高叶片叶绿素和可溶性蛋白含量,促进植株干物质积累。同时,COR可促进玉米苗期根系生长,增加根长和根表面积,进而可有效增加根系吸收能力。研究结果表明,适宜浓度的COR处理可以提高玉米幼苗光合性能,增强根系吸收能力,促进植株地上部和地下部的生长,有利于培育壮苗。The study was conducted to investigate the effects of bioregulator coronatine（ COR） on the development of plant shoot and root morphological parameters,and evaluate the regulation of leaf areas,chlorophyll contents and soluble protein content in maize（ Zea mays L.,cv. Jinhai 5） seedling under field conditions. The maize plants were treated with seed dressing or foliar spraying at V3 stage using different COR concentrations. The regulation of different concentrations of COR on the morphology in maize seedling showed that lowconcentrations of COR promoted seedling growth,but high concentrations of COR inhibited the growth. Seed dressing or foliar spraying with 0. 1 mg / L COR promoted the plant height and the stem diameter growth,increased the leaf area per plant,improved the chlorophyll and soluble protein content in leaves,and enhanced the dry matter accumulation. Thus,COR promoted the maize root growth,increased root length and root surface area,which could effectively increase the absorption ability of the root. These results suggest that COR treatment may be a good strategy for strong seedlings cultivation in maize,by enhancing leaf photosynthetic performance and root absorption ability,which promoted the growth of shoot and root in maize seedling.

关 键 词：植物生长调节剂 冠菌素 玉米 幼苗 形态建成 调控效应 

分 类 号：S482.8[农业科学—农药学]