外源植物激素对白枪杆幼苗生物量分配的影响  

Effect of Exogenous Plant Hormones on Biomass Allocation of Fraxinus malacophylla Seedlings

作　　者：段华超 郑鑫华 李燕燕 叶澜 井卉竹 董琼[1] DUAN Huachao;ZHENG Xinhua;LI Yanyan;YE Lan;JING Huizhu;DONG Qiong(Southwest Forestry University,Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountainous Areas of China,Ministry of Education,Kunming 650224,China)

机构地区：[1]西南林业大学西南山地森林资源保育与利用教育部重点实验室,昆明650224

出　　处：《林业资源管理》2021年第3期76-83,共8页Forest Resources Management

基　　金：国家自然科学基金(31260191);云南省教育厅科学研究基金(2019Y0125)。

摘　　要：以白枪杆容器苗为材料,采用L9(34)正交实验方法,测定玉米素(ZT)、3-吲哚乙酸(IAA)和赤霉素(GA3)3种外源植物激素不同组合处理下白枪杆幼苗的生物量,比较分析幼苗生物量及其分配与不同激素的关系,并采用标准主轴回归分析白枪杆幼苗各器官之间在不同外源植物激素处理下的异速生长关系。结果表明:不同外源植物激素中,ZT和IAA对幼苗生物量起主导作用,而GA3作用不明显。不同处理间生物量及各器官生物量分配存在显著差异,4号处理(ZT 50mg/L,IAA 50mg/L,GA3150mg/L)各器官生物量显著大于其他处理,但各器官生物量分配比不显著,9号处理(ZT 75 mg/L,IAA 150 mg/L,GA3150mg/L)总生物量最小,但具有较高的茎生物量分配比。不同外源植物激素处理下各器官之间异速生长关系不同,但总体均呈等速生长,说明外源植物激素对白枪杆幼苗的异速生长影响不显著。不同外源植物激素作用下,白枪杆幼苗生物量显著改变,幼苗对环境中资源的分配无明显变化。Taking Fraxinus malacophylla container seedlings as materials,L9(34)orthogonal experiment method was used to determine the biomass of Fraxinus malacophylla seedlings under three exogenous plant hormones,zeatin(ZT),3-indoleacetic acid(IAA),and gibberellin(GA3),the relationship between the biomass and its distribution of different seedlings and different hormones was compared and analyzed.The allometric growth relationship between different organs of Fraxinus malacophylla seedlings under different exogenous plant hormone treatments was analyzed using standard spindle regression.The results showed that among different exogenous plant hormones,ZT and IAA dominated the biomass of seedlings,and GA3 had no significant effect;there was a significant difference in biomass and biomass allocation of different organs between different treatments.Treatment No.4(ZT 50mg/L,IAA 50mg/L,GA3150 mg/L)was significantly larger than other treatments,but the biomass allocation ratio of each organ was not significant.Treatment No.9(ZT 75 mg/L,IAA 150 mg/L,GA3150 mg/L)had the smallest total biomass,but it had a higher stem biomass distribution ratio.The allogeneic growth relationship between different organs under different exogenous plant hormone treatments was different,but the overall growth was isokinetic,indicating that the effect of exogenous plant hormones on allometric growth of Fraxinus malacophylla seedlings was not significant.Under the action of different exogenous plant hormones,the biomass of Fraxinus malacophylla seedlings has changed significantly,and the distribution of resources in the environment by the seedlings has not changed significantly.

关 键 词：白枪杆 外源植物激素 生物量分配 异速生长 

分 类 号：S792.99[农业科学—林木遗传育种]