摘要
以罗马生菜种子为材料,研究了6种不同比例的红(R)蓝(B)光质(2R/1B,4R/1B,8R/1B,1R/2B,1R/4B,1R/8B)对生菜种子萌发及幼苗生长的影响。结果表明:与对照的白光相比,以红光为主的复合光处理(2R/1B,4R/1B,8R/1B)促进种子萌发效果明显,其发芽势、发芽指数和活力指数均显著高于对照。红蓝复合光对生菜幼苗的形态建成、根系活力、叶片色素含量和叶绿素荧光均有促进作用,以红光为主的复合光处理促进效果优于以蓝光为主的复合光处理。在以红光为主的复合光处理中,2R/1B,4R/1B处理对生菜种子萌发及幼苗生长的促进效果优于8R/1B。总之,不同红蓝光比例显著影响了生菜种子萌发及幼苗生长,其中以2R/1B和4R/1B处理最优。
The study investigated the effects of light qualities on seed germination and seedling growth of lettuce.Plants were grown under six different combinations of red and blue light（ 2R /1B,4R /1B,8R /1B,1R /2B,1R /4B,1R /8B）. The results showed that different light qualities had different influences on seed germination and seedling growth of lettuce. The combination of red（ R） and blue（ B） lights based on red promoted seed germination obviously,and the germination potential,germination index and vigor index under these treatments were significantly higher than those of control. Compared with seedlings grown under white light,the mixture of blue and red light promoted the morphogenesis,root activity,content of leaf pigment and chlorophyll fluorescence of lettuce seedlings.Furthermore,the promoting effects under the RB lights based on red were better than those of treatments based on blue. The combination of 2R /1B and 4R /1B were better than the combination of 8B /1R on promoting seed germination and seedling growth in lettuce. These results indicated that light quality significantly affected the seed germination andseedling growth of lettuce,and the treatments of 2R /1B and 4R /1B showed more superiority than others.
出处
《浙江农业学报》
CSCD
北大核心
2014年第3期603-608,共6页
Acta Agriculturae Zhejiangensis
基金
上海市闵行区科技项目(2013MH086)
上海市自然基金项目(12ZR1427600)
公益性行业科研专项(201303108)
关键词
生菜
光质
种子萌发
生长
Lactuca sativa L.
light quality
seed germination
growth
