摘要
彩叶桂品种群(Osmanthus fragrans Color Group)是近年新确立的具有丰富叶色变化的桂花品种,应用前景广阔。为揭示光照调控彩叶桂叶片颜色的机制,优化栽培条件以提高其观赏价值,采用人工光照控制研究光质、光强和光照时长对3个彩叶桂品种(闽台桂魁、永福金彩、闽农桂冠)的叶色参数(L^(*),a^(*),b^(*))和色素含量的影响。结果显示,彩叶桂的叶色参数受光质、光强、光照时间及其交互作用的影响显著,但品种间存在一定差异。闽台桂魁在红光400μmol·m^(-2)·s^(-1)下L^(*)值最高(40.8±3.93),a^(*)值和b^(*)值也较高;永福金彩在蓝光400μmol·m^(-2)·s^(-1)下L^(*)值达到50.40±6.83,b^(*)值为27.99±8.85;闽农桂冠在蓝光400μmol·m^(-2)·s^(-1)下L^(*)值为47.70±7.30。光质和光强显著影响彩叶桂色素含量,在白光下不同光照时长对叶绿素a的合成均有促进作用,闽台桂魁在白光下光照处理7 d的含量达到0.339 mg·g^(-1),光照处理28 d后进一步增加至0.873 mg·g^(-1);蓝光则在早期显著提升花色素的含量;红光在后期显著提升叶绿素含量。此外,永福金彩在高光强下,光照处理21 d的叶绿素a和总叶绿素含量显著高于低光强;而在光照处理7 d后,低光强下的花色素含量明显高于高光强;表明高光强有助于叶绿素和类胡萝卜素的合成,而低光强则更有利于花色素的积累。
The Osmanthus fragrans Color Group is a newly established variety of Osmanthus with vibrant leaf color changes and holds broad application prospects.To elucidate the mechanisms by which light regulates the coloration of Osmanthus fragrans leaves and to optimize cultivation conditions to enhance its ornamental value,this study investigated the effects of light quality,intensity,and duration on leaf color parameters(L^(*),a^(*),b^(*))and pigment content in three variegated Osmanthus fragrans Color Group(′Mintaigui Kui′,′Yongfujin Cai′and′Minnong Guiguan′)under controlled artificial lighting conditions.The results showed that the leaf color parameters of variegated Osmanthus fragrans were significantly affected by light quality,light intensity,time,and their interactions.Mintaigui Kui showed the highest L^(*)value(40.8±3.93)under red light at 400μmol·m^(-2)·s^(-1),along with high a^(*)and b^(*)values.Yongfujin Cai under blue light at the same intensity had an L^(*)value of 50.40±6.83 and b^(*)value of 27.99±8.85.Light quality and intensity markedly affect pigment content.White light consistently promotes chlorophyll synthesis across stages,with Mintaigui Kui reaching 0.339 mg·g^(-1)in the first stage,increasing to 0.873 mg·g^(-1)by the fourth.Blue light boosts early-stage anthocyanin content,while red light enhances late-stage chlorophyll synthesis.Yongfujin Cai exhibited higher chlorophyll content in the third stage under high light intensity and higher anthocyanin content in the first stage under low light intensity.This suggests that high light intensity favors chlorophyll and carotenoid synthesis,whereas low light intensity promotes anthocyanin accumulation.
作者
李俊楠
陈杭
汤行昊
黄建辉
黄如顺
黄云鹏
LI Junnan;CHEN Hang;TANG Xinghao;HUA MG Jianhui;HUANG Rushun;HUANG Yunpeng(Fujian Academy of Forestry Sciences,Fuzhou 350012,Fujian,China;College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Sanming Forestry School,Sanming 365001,Fujian,China)
出处
《福建林业科技》
2024年第3期47-55,共9页
Journal of Fujian Forestry Science and Technology
基金
2021年省属公益类科研院所基本科研专项(2021R1010005)。
关键词
彩叶桂
光照处理
叶色参数
叶片色素
叶色变化
Osmanthus fragrans Color Group
light treatments
leaf color parameters
leaf pigments
leaf color changes
