不同浓度芸薹素内酯对蔓性千斤拔幼苗生长的影响  

Effect of Different Concentrations Brassinolide on the Growth of Flemingia philippinensis Seedings

作　　者：李小勇 夏祥华[2] 黄春梅 于善祥 LI Xiaoyong;XIA Xianghua;HUANG Chunmei;YU Shanxiang(College of Food and Biological Engineering,Hezhou University,Hezhou 542899,China;Guangxi Botanical Garden of Medicinal Plant,Nanning 530023,China;College of Tourism and Physical Health,Hezhou University,Hezhou 542899,China)

机构地区：[1]贺州学院食品与生物工程学院,广西贺州542899 [2]广西壮族自治区药用植物园,广西南宁530023 [3]贺州学院旅游与体育健康学院,广西贺州542899

出　　处：《湖南生态科学学报》2024年第3期33-39,共7页Journal of Hunan Ecological Science

基　　金：贺州学院博士启动基金(HZUBS201709);广西重点研发项目(桂科AB22035077);广西科学研究与技术开发计划项目(桂科重1598005-14)。

摘　　要：【目的】探讨芸薹素内酯(BR)对蔓性千斤拔(Flemingia philippinensis)幼苗的调控效应,以期为蔓性千斤拔规范化栽培提供技术支撑。【方法】以蔓性千斤拔幼苗为研究对象,采用单因素完全随机区组试验设计,对4种不同浓度的芸薹素内酯处理(CK:0 mg/L、T1:0.025 mg/L、T2:0.033 mg/L、T3:0.05 mg/L)的蔓性千斤拔幼苗的农艺性状、生物量、根冠比、叶面积与比叶重等进行比较分析。【结果】喷施芸薹素内酯对蔓性千斤拔幼苗的株高、叶片数、分枝数、主茎直径、主根长和直径、单株生物量和叶面积均表现出较显著的正向调控作用,但对根冠比和比叶重(幼苗生长前中期)有显著负向调控作用,且低浓度处理(T1)的效果明显优于T2和T1处理;与CK相比较,喷施后35 d,T1处理的株高和分枝数分别增加33.40%和48.8%,其主根直径和主茎直径分别增宽22.55%和22.45%;单株叶面积和生物量分别显著提高了79.45%和82.40%;其主根长增加了12.27%;但在叶片数上不同浓度芸薹素内酯处理间均无显著差异;在幼苗生长后期不同芸薹素内酯处理的比叶重与CK间差异均不显著。【结论】喷施芸薹素内酯对蔓性千斤拔幼苗的个体生长性能有显著的促进作用,以BR质量浓度为0.025 mg/L的处理效果较好。【Objective】This study is conducted to explicit regulation effect of brassinolide(BR)on Flemingia philippinensis seedings so as to provide technical support for the standardized cultivation of Flemingia philippinensis.【Method】The Flemingia philippinensis seedlings were used as the test material,and a single factor completely randomized block design was conducted to determine the effect of four treatments of different BR contents(CK:0 mg/L,T1:0.025 mg/L,T2:0.033 mg/L,T3:0.05 mg/L)on agricultural characteristics,biomass,the ratio of root to shoot,leaf areas and the specific leaf weight per unit area.【Result】The research results indicated that the application of BR showed significant positive effects on the increasing of the plant height,leaf number,the branch number and diameter of main stem,the length and diameter of main root,the dry matter weight and leaf area per plant of seedlings,but showed negative effects on decreasing of the ratio of root to shoot and the specific leaf weight per unit area at early and middle stages of seedling growth.The effect of low BR content treatment(T1)was significantly better than that of T2 and T1.At 35 days after sproying BR,compared to the CK treatment,the T1 treatment increased the plant height and the branch number of main stem by 33.40%and 48.8%,the main stem diameter and the main root diameter by 22.55%,22.45%;The leaf area and biomass per plant by 79.45%and 82.40%,respectively,and the main root length increased by 12.27%.However,there was no significant difference in the leaf numbers among BR treatments,and no significant difference at later stages of seedling growth was observed in the specific leaf weight per unit area between BR treatments and CK.【Conclusion】The application of BR has a significant effect on the individual growth performance of the seedlings,and the effect from the T1 treatment of 0.025 mg/L BR is the best among all BR treatments.

关 键 词：芸薹素内酯 蔓性千斤拔 幼苗 生长 

分 类 号：Q94[生物学—植物学] S3[农业科学—农艺学]