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FOREST RESOURCES WANAGEMENT ›› 2021›› Issue (3): 76-83.doi: 10.13466/j.cnki.lyzygl.2021.03.012

• Scientific Research • Previous Articles     Next Articles

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

DUAN Huachao(), ZHENG Xinhua, LI Yanyan, YE Lan, JING Huizhu, DONG Qiong()   

  1. Southwest Forestry University,Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountainous Areas of China,Ministry of Education,Kunming 650224,China
  • Received:2021-03-26 Revised:2021-05-25 Online:2021-06-28 Published:2021-08-04
  • Contact: DONG Qiong E-mail:1916134612@qq.com;dqyeam@swfu.edu.cn

Abstract:

Taking Fraxinus malacophylla container seedlings as materials,L9 (3 4) 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,GA3 150 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.

Key words: Fraxinus malacophylla, exogenous plant hormones, biomass allocation, allometry

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