中国农业大学学报2024，Vol.29Issue(10)：131-138,8.DOI:10.11841/j.issn.1007-4333.2024.10.11
光质交替对LED红蓝光连续光照生菜生理伤害的削减作用机制
Physiological mechanisms of light quality alternation in alleviating the injury on lettuce caused by continuous red and blue light illumination
摘要
Abstract
In environmentally controlled plant factory,the effects of conventional light(NL,400 μmol/(m2·s),18 h/6 h photoperiod,R/B=4∶1),continuous light(CL,300 μmol/(m2·s),24 h/0 h photoperiod,R/B=4∶1)and spectral alternation continuous light(CL-A,red light with 320 μmol/(m2·s)and 18 h light period,blue light 240 μmol/(m2·s)with6 h light period,respectively)on the growth,yield,DPPH radical scavenging rate,and contents of carbohydrate,reactive oxygen species and MDA of lettuce were investigated via hydroponic culture and diurnal six sampling method(3 times at 6 h interval in the light period and 3 times at 2 h interval in the dark period).The results showed that:The lettuce leaves were damaged and the plant morphology was changed after 12 days treatment.The shoot fresh weight and leaf area of lettuce were the highest and the injury grade was the lowest under CL-A treatment.In NL,CL and CL-A order,the contents of starch and sucrose,the DPPH free radical scavenging rate increased gradually significantly,while the contents of hydrogen peroxide and MDA increased first and then decreased,but the superoxide anions content increased first and then decreased or always increased.In conclusion,light quality alternation alleviates the injury on lettuce caused by continuous red and blue light illumination.This study provides scientific support for the application of alternating light quality and continuous lighting in artificial light plant factories.关键词
生菜/连续光照/光质交替/碳水化合物/活性氧Key words
lettuce/continuous light/spectral alternation/carbohydrate/reactive oxygen species分类
农业科技引用本文复制引用
刘文科,刘家源..光质交替对LED红蓝光连续光照生菜生理伤害的削减作用机制[J].中国农业大学学报,2024,29(10):131-138,8.基金项目
中国农业科学院科技创新工程项目(CAAS-IEDA-T07) （CAAS-IEDA-T07）
国家自然科学基金面上项目(31672202) （31672202）
