山东农业大学学报（自然科学版）2024，Vol.55Issue(6)：859-866,8.DOI:10.3969/j.issn.1000-2324.2024.06.005
红蓝光配比对黄瓜幼苗光合特性的影响
Effects of Red and Blue Light ratio on Photosynthetic Characters of Cucumber Seedlings
摘要
Abstract
Using the cucumber variety'Jinyou 365'as the test material,eight light quality treatments were set up:white light(W),monochromatic red light(R),monochromatic blue light(B),and different ratios of red-blue composite light(9R1B,7R3B,5R5B,3R7B,1R9B).The results indicated that red-blue light significantly affected the steady-state and dynamic photosynthesis of cucumber seedlings.Compared to red light,blue light plays a crucial role in enhancing the maximum photosynthetic capacity(Pmax)of cucumber seedlings,mainly by increasing the apparent quantum efficiency(AQE),the maximum carboxylation efficiency of Rubisco(Vcmax),the maximum electron transport rate(Jmax),the triose phosphate utilization efficiency(TPU),and the stomatal conductance(Gs).Under red-blue composite light treatments,AQE,Vcmax,Jmax,TPU,and Pmax increased with the rise in the proportion of blue light,with the 1R9B treatment achieving the highest maximum photosynthetic rate(Pmax).However,there was no significant difference between the 1R9B treatment and the 5R5B and 3R7B treatments.Additionally,an appropriate proportion of blue light(30%-70%)also increased the induction rate of net photosynthetic rate(A)during the transition from low to high light,and reduced the time required for the photosynthetic rate to increase by 90%(T90%A).The T90%A under the 1R9B treatment was significantly higher than that of the 7R3B,5R5B,and 3R7B treatments,indicating that excessive blue light can decrease the induction rate of photosynthetic rate.In summary,increasing the appropriate proportion of blue light can not only enhance the maximum photosynthetic capacity of cucumber seedlings but also accelerate the induction rate of photosynthetic rate,improving the dynamic photosynthetic capacity of cucumber seedlings.The 5R5B and 3R7B treatments resulted in the best maximum photosynthetic capacity and dynamic photosynthetic capacity for cucumber seedlings.关键词
黄瓜/红蓝光/稳态光合作用/动态光合作用Key words
Cucumber/red and blue light/steady-state photosynthesis/dynamic photosynthesis分类
农业科技引用本文复制引用
王腾起,孙启颖,刘彬彬,李清明..红蓝光配比对黄瓜幼苗光合特性的影响[J].山东农业大学学报（自然科学版）,2024,55(6):859-866,8.基金项目
中国农业科学院科技创新工程项目(34-IUA-03) （34-IUA-03）
成都农业科技中心地方财政专项资金项目(NASC2022KR01,NASC2023ST06,NASC2024KR03) （NASC2022KR01,NASC2023ST06,NASC2024KR03）
