油菜素内酯对甘草性状及7种化学成分含量的影响

该文以两年生乌拉尔甘草Glycyrrhiza uralensis植株为试验材料,于甘草生长旺盛的7月喷施4种不同质量浓度(0.1,0.4,0.7,1.0 mg·L-1)的油菜素内酯,分别于8,9,10月取样测量其性状(株高、地茎、节数、节间高度、根长、根粗、根鲜重、根干重),利用HPLC检测7种化学成分(甘草酸、甘草苷、异甘草苷、甘草素、异甘草素、芹糖基甘草苷和芹糖基异甘草苷)的含量,分析外源油菜素内酯处理后栽培甘草的性状及7种成分含量的动态变化,为提高栽培甘草的产量和质量提供参考依据。结果表明,0.7 mg·L-1的油菜素内酯处理2个月后,其株高、地茎、根长、根粗、根鲜重、根干重均比对照提高,其提高幅度为15.09%,6.15%,16.52%,8.46%,21.90%,29.41%;其化学成分除异甘草素外,甘草酸,甘草苷,异甘草苷,甘草素,芹糖基甘草苷,芹糖基异甘草苷分别比对照提高20.16%,45.31%,53.56%,27.66%,23.54%,8.46%。并且BR对栽培甘草的作用在处理完2个月后达到最佳值。说明外源喷施BR可以同时提高栽培甘草的产量和质量。

Effect of exogenous brassinolide on morphological characters and contents of seven chemical constituents of Glycyrrhiza uralensis

The transplants of the two-year-old Glycyrrhiza uralensis were subjected to four concentration of brassinolide (BR 0.1, 0.4, 0.7, 1.0 mg·L^-1) in July. The morphological characters ( plant height, stem diameter, nodes number, internode length and root length, root thick, root fresh weight and root dry weight ) were measured and seven kinds of chemical constituents (glycyrrhizic acid, liquiritin, isoliquiritin, liquiritigenin, isoliquiritigenin, liquiritin apioside, isoliquiritin apioside) were determined by HPLC with the aim of increasing sinter output and improving quality of G. uralensis. Then the long-term dynamic changes of these morphological characters and chemical compositions' content were analyzed. The results showed that morphological characters of plant height, stem diameter, root length, root thick, root fresh weight and root dry weight increased remarkably with the 0.7 mg·L^-1 BR stimulating 2 months later,the increase rates were: 15.09%,6.15%,16.52%,8.46%,21.90%,29.41%, respectively. The content of glycyrrhizic acid, liquiritin, isoliquiritin, liquiritigenin, liquiritin apioside, isoliquiritin apioside were increased 20.16%,45.31%,53.56%,27.66%,23.54%,8.46% with the 0.7 mg·L^-1 BR stimulating 2 months later. The best effects were achieved in 2 months after brassinolide stimulating. The conclusions prove that morphological characters and the main chemical constituents accumulation of G. uralensis could be effected by exogenous BR stimulation in certain case.