广西植物2023，Vol.43Issue(12)：2362-2373,12.DOI:10.11931/guihaia.gxzw202205073
光质和光周期对山白兰苗木生长、生理的影响
Effects of light quality and photoperiod on growth and physiology of Michelia baillonii seedlings
摘要
Abstract
In order to explore an efficient artificial light environment for improving the quality of Michelia baillonii and shortening its cultivation cycle,the annual seedlings of M.baillonii were exposed to five composite lights,red+blue(8R1B,6R1B),red+blue+purple+green(8R1B1P1G,6R1B1P1G),and white light(W)with two photoperiods(12,16 h·d-1),two-factor experiment with randomized block design and subordinate function were used to explore the response pattern of the growth,photosynthetic pigments and endogenous hormone contents of M.baillonii seedlings to different light qualities and photoperiods.The results were as follows:(1)Light quality,photoperiod,and their interaction had significant effects on height growth,leaf area,chlorophyll a,zeatin(ZR),abscisic acid(ABA)content,and endogenous hormone ratio(IAA/ABA,(IAA+GA3+ZR)/ABA)(P<0.05).(2)16 h·d-1 photoperiod was conducive to the improvement of height growth,leaf area,seedling quality index,biomass,chlorophyll a,auxin(IAA),ZR content,and endogenous hormones ratio.(3)Under 16 h·d-1,height growth,leaf area,and seedling quality index under 8R1B treatment reached the maximum value,which were 21.84 cm,158.39 cm2 and 2.43,respectively;compared with the 6R1B treatment,the 8R1B had higher chlorophyll a/b and ZR content;compared with the 6R1B1P1G treatment,the 8R1B1P1G had higher chlorophyll a,a/b,carotenoids,IAA,gibberellin(GA3)and endogenous hormones ratio.In conclusion,red-blue composite light quality with higher red ratio and proper extension of photoperiod are conducive to improving the quality of M.baillonii,while the addition of purple-green light can not promote its growth,16×8R1B is the most suitable light condition for the growth of M.baillonii seedlings.关键词
山白兰/LED/光质/光周期/生长/光合色素/内源激素Key words
Michelia baillonii/LED/light quality/photoperiod/growth/photosynthetic pigments/endogenous hormone分类
农业科技引用本文复制引用
谢慈江,何福英,刘莉,韦秋梅,杨梅..光质和光周期对山白兰苗木生长、生理的影响[J].广西植物,2023,43(12):2362-2373,12.基金项目
广西林业科技项目(桂林科研 2022ZC 第 75 号) （桂林科研 2022ZC 第 75 号）
中央财政林业科技推广示范项目([2017]TG15 号). （[2017]TG15 号）
