陕西林业科技2025，Vol.53Issue(1)：37-41,5.DOI:10.3969/j.issn.1001-2117.2025.01.007
光强和光周期对观光木种子萌发及幼苗生理特性的影响
Effect of Light Intensity and Photoperiod on Seed Germination and Seedling Characteristics of Michelia odora
摘要
Abstract
In order to explore the effects of light factors on seed germination and physiological charac-teristics of Michelia odora,the seeds of Michelia odora were used as the research object,and the dark(T1)was set up with 3000 lx light intensity,12 h·d-1 photoperiod(T2);3000 lx light intensity,24 h·d-1photoperiod(T3);5000 lx light intensity,12 h·d-1photoperiod(T4);5000 lx light intensi-ty,24 h·d-1photoperiod(T5),a total of five treatments applied.The seed germination and seedling physiological indexes were determined,aiming to provide a strong basis for seed germination and seed-ling cultivation of Michelia odora.The results showed that:(1)there were significant differences in germination and physiological indexes under different light and photoperiod treatments.(2)With the increase of light intensity and photoperiod,the soluble sugar content continued to increase,and the maximum value was at 5000 lx light intensity and 24 h·d-1 photoperiod.The MDA content increased first and then decreased,reaching a maximum of 3.49 µmol·g-1at 3000 lx light intensity and 24 h·d-1 photoperiod.(3)The seed germination rate,germination potential,germination index,soluble protein content and POD activity showed an overall trend of increasing,decreasing,and then increas-ing.The germination potential reached a maximum of 75.18％at 3000 lx light intensity and 24 h·d-1 photoperiod.The germination rate and germination index reached the maximum values at 5000 lx light intensity and 24 h·d-1photoperiod,which were 74.08％and 3.18,respectively.In summary,5000 lx light intensity and 24 h·d-1 photoperiod were conducive to seed germination and seedling growth of Michelia odora.关键词
光强/光周期/观光木/种子萌发/生理特性Key words
Light intensity/photoperiod/Michelia odora/seed germination/physiological characteris-tics分类
农业科技引用本文复制引用
刘玉军,李坤杰,李裕华,徐圆圆,黄庆鹤,杨梅,罗益敏..光强和光周期对观光木种子萌发及幼苗生理特性的影响[J].陕西林业科技,2025,53(1):37-41,5.基金项目
广西自筹经费林业科技项目(桂林科研[2022ZC]第71号). （桂林科研[2022ZC]第71号）
