激光生物学报2024，Vol.33Issue(2)：115-122,8.DOI:10.3969/j.issn.1007-7146.2024.02.003
植物工厂环境下光强对陆地棉生长发育的影响
Effects of Light Flux Density on the Growth and Development of Land Cotton in a Plant Factory Environment
摘要
Abstract
Xiang FZ001 was used as a test variety in this experiment,which was conducted in a plant factory with a cycle of 16 hours of light and 8 hours of darkness to study the effects of varying light intensities on the growth and development of cot-ton(Gossypium hirsutum L.),three light intensity treatments with parameters of L1:450 µmol∙m-2∙s-1,L2:600 µmol∙m-2∙s-1,and L3:750 µmol∙m-2∙s-1,were established to determine the dry weight of each cotton organ.The height of the cotton plant was measured using a straightedge,the chlorophyll content of cotton leaves was measured using a SPAD-502 chlorophyll meter.Ad-ditionally,six chlorophyll fluorescence parameters were measured,including initial fluorescence(F0)and maximum fluorescence(Fm),using a Flour Pen 110.The relative chlorophyll content and plant height of cotton were greatest under the L1 light intensity treatment,the root dry weight of cotton was greatest under the L2 light intensity treatment,and the total weight of cotton stems,leaves,and individual plants under the three light intensity treatments were L3>L2>L1 in descending order,and the F0 and Fm were L1>L2>L3 in descending order.The maximum photochemical quantum yield(Fv/Fm)was L2>L3>L1 in descending or-der.The photochemical bursting coefficient(qp)and effective quantum yield(φPSII)of cotton under the same light intensity treat-ment showed the same curves of change.During the pre-growth era,there was no significant difference in the qp,φPSII,and non-photochemical burst(NPQ)of cotton under the three light intensity treatments.However,in the late period,there was a greater difference.For the late growth stage,cotton's qp and φPSII under the three light intensity treatments were high to low in the order of L3>L2>L1,and high to low in the order of L2>L3>L1.High light intensities increase the dry weight,stem dry weight,and leaf dry weight of cotton plants;low light intensities enhance the height of the cotton plant,but too high or too low a light intensity prevents the growth of cotton roots.Compared with cotton under L1 and L3 light intensity treatments,L2 light intensity was suit-able for cotton growth,avoiding both inter-plant competition for light and the phenomenon of photoinhibition,with moderate chlo-rophyll content,resulting in the highest photochemical efficiency of cotton.This study can provide a guidance for cotton factory production and cotton breeding accelerator development and application.关键词
植物工厂/光强/陆地棉/生长发育/光合特性Key words
plant factory/light flux density/Gossypium hirsutum L./growth and development/photosynthetic characteristics分类
生物学引用本文复制引用
卢建祥,高倩文,高志强,陈浩东,阳会兵..植物工厂环境下光强对陆地棉生长发育的影响[J].激光生物学报,2024,33(2):115-122,8.基金项目
2023年湖南省棉花科技创新专项项目(湘财建指[2023]98号) （湘财建指[2023]98号）
2022年湖南省棉花科技创新专项项目(湘财建指[2022]51号) （湘财建指[2022]51号）
2021年湖南省自然科学基金项目(2021JJ30348). （2021JJ30348）
