文献类型：期刊文献

中文题名：遮荫对绿竹容器苗光合作用及生长的影响

英文题名：The effects of shading on photosynthetic characteristics and growth of Dendrocalamopsis oldhami seedlings in container

作者：杜澜[1] 谢锦忠[1] 赖秋香[2] 陈亮[1] 张玮[1] 陈胜[1] 夏捷[1] 吴炜[2]

第一作者：杜澜

机构：[1]中国林业科学研究院亚热带林业研究所;[2]福建省永安林业(集团)股份有限公司

年份：2019

卷号：38

期号：1

起止页码：67-73

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金："十二五"农村领域国家科技计划课题(2015BAD04B01-5);"十三五"国家重大研发计划课题(2016YFD060090104);对发展中国家科技援助项目(KY201502001)资助

语种：中文

中文关键词：绿竹;遮荫;光合作用;叶绿素荧光;光合色素含量;生长形态

外文关键词：Dendrocalamopsis oldhami;shading;photosynthesis;chlorophyll fluorescence;photosynthetic pigment content;growth character

分类号：S792.12

摘要：绿竹是中国南亚热带地区重要的造林竹种,在竹材加工及笋用具有广阔的应用前景。以自然光(100%光照,L0)为对照、一层遮阳网(70%光照,L1)、两层遮阳网(30%光照,L2)为处理,探究3种光环境下绿竹的光合能力、叶绿素荧光及生长特性的差异。结果表明:L1遮荫处理导致了绿竹叶片表观量子效率和净光合速率的升高,而L2处理最低,且L0、L1均与L2达到差异显著(P <0.05);随着生长光强的降低,暗呼吸速率(Rd)、光补偿点(LCP)、光饱和点(LSP)均有所降低;荧光参数方面,遮荫导致了PSⅡ原初光能转换效率(Fv/Fm)、PSⅡ潜在活性(Fv/Fo)和电子传递速率(ETR)显著增加;而PSⅡ有效光量子产量(Fv'/Fm')、光化学猝灭系数(qP)和非光化学猝灭系数(NPQ)有所降低;遮荫同时导致了光合色素含量(Chla+Chlb)和叶绿素(Chla/Chlb)值的显著增加,其中L0与L2达到差异显著(P<0.05);在生长形态方面,70%光照环境下基径最大,叶面积有所增加,而对株高则无显著影响(P>0.05);绿竹对轻度遮荫环境具有较好的适应性,具有可适应的内在调节机制,而低光环境则会成为绿竹容器苗幼苗生长的决定性限制性因子。
Dendrocalamopsis oldhami is an important bamboo species for afforestation in south subtropical China,with a broad application prospect in culm and shoot production. In this study,photosynthetic capacity,chlorophyll fluorescence parameters,and growth characteristics of D.oldhami were investigated under three shading treatments: no shading as control( full illumination,L0),single-layer shading( 70% of full illumination,L1),and two-layer shading( 30% of full illumination,L2). We found that treatment L1 increased the apparent quantum efficiency and net photosynthetic rate of D. oldhami leaves,while treatment L2 had the lower values,with significant difference among the three treatments( P<0.05). The dark respiration rate( Rd),light compensation point( LCP),and light saturation point( LSP) declined with decreasing light levels. For the chlorophyll fluorescence parameters,shading significantly increased PSⅡ primary energy conversion efficiency( Fv/Fm),PSⅡ potential activity( Fv/Fo) and electron transport rate( ETR), and decreased photochemical efficiency of PS Ⅱ( Fv’/Fm’), photochemical quenching( qP) and non-photochemical quenching( NPQ). Moreover,shading significantly increased leaf chlorophyll content( Chla +Chlb) and Chla/Chlb ratio,with a significant difference between treatments L0 and L2( P<0.05). Shading enhanced the growth performance of D.oldhami,with greatest basal diameter in treatment L1. Leaf area increased with the increases of shading levels. There was no effect of shading on plant height( P>0.05). Thus,D. oldhami has a strong adaptability to weak shading environment and an adjustable inherent mechanism to utilize low-intensity light. However,low light intensity would restrict the growth of D. oldhami container seedlings.