生态学报2017，Vol.37Issue(2)：549-556,8.DOI:10.5846/stxb201508261778
三种园林植物对夜间光照的响应与适应特征
Responses and adaptive status of three garden plants exposed to night illumination
摘要
Abstract
Light pollution is one of the most serious pollutants in urban ecosystems.Existing research in this field has mainly focused on the effects of light pollution on human health,life cycles,and behavior and actions of insects or other animals,whereas information regarding its effects on the physiology and ecology of plants is lacking.We used Impatiens balsamina,Gardenia jasminoides,and Dendranthema morifolium to document biomass accumulation and allocation,blossoming,pigmentation,C and N content (and C/N ratio),and activities of antioxidant enzymes in response to night illumination produced by a white LED from 18:00 to 24:00 (T1 treatment),from 18:00 to 08:00 the following day (T2 treatment),and natural photoperiod (control;CK).The main results were as follows:(1) Compared to CK,T1 and T2 increased the biomass of I.balsamina by 1.4 and 1.9 times,respectively,and the C/N ratio in leaves by 1.2 and 1.9 times,respectively,but decreased the N content in leaves and stems,and content of pigments in leaves.The T1 treatment delayed florescence,and the T2 treatment inhibited flowering.(2) Although neither T1 nor T2 affected the florescence of G.jasminoides,night illumination increased the average number of flowers and decreased average weight per flower.Compared to CK,T2 significantly increased the C/N ratio in flowers and content of malondialdehyde (MDA),although it decreased chlorophyll a,b,and total chlorophyll content in leaves.(3) Biomass and physiological traits were not obviously affected in D.morifolium.However,both T1 and T2 inhibited flowering.These results indicated that flowering of both I.balsamina and D.morifolium were sensitive to the altered photoperiodism induced by nighttime illumination.In addition,growth and nutrient status of Ⅰ.balsamina was negatively affected by nighttime illumination,and there was a detrimental effect on the leaves of G.jasminoides.Generally,when compared to T2,the T1 treatment exerted fewer negative impacts on the three species.Therefore,in urban light management,we should shorten the duration of illumination to the degree it is practical.This will not only save electric energy,but also lessen the negative influence on the physiology and ecology of garden plants.关键词
光污染/园林植物/白光LED/光周期Key words
light pollution/night illumination/white LED/photoperiodism引用本文复制引用
陈良华,曹艺,杨万勤,张健,何书惠..三种园林植物对夜间光照的响应与适应特征[J].生态学报,2017,37(2):549-556,8.基金项目
国家自然科学基金资助项目(31300513) （31300513）
国家“十二五”科技支撑计划课题资助项目(2011BAC09B05) （2011BAC09B05）
