Leaf Morphology, Photosynthetic Performance, Chlorophyll Fluorescence, Stomata! Development of Lettuce (Lactuca sativa L.) Exposed to Different Ratios of Red Light to Blue Light

doi:10.3389/fpls.2016.00250

	Leaf Morphology, Photosynthetic Performance, Chlorophyll Fluorescence, Stomata! Development of Lettuce (Lactuca sativa L.) Exposed to Different Ratios of Red Light to Blue Light
	Wang, Jun 1,2; Lu, Wei 1,2; Tong, Yuxin 1,2; Yang, Qichang 1,2
刊名	FRONTIERS IN PLANT SCIENCE
	2016
卷号	7 页码:-
关键词	R/B ratio photosynthetic performance chlorophyll fluorescence stomata dry weight Lactuca sativa L.
ISSN号	1664-462X
DOI	10.3389/fpls.2016.00250
通讯作者	Wang, Jun
英文摘要	Red and blue light are both vital factors for plant growth and development. We examined how different ratios of red light to blue light (R/B) provided by light emitting diodes affected photosynthetic performance by investigating parameters related to photosynthesis, including leaf morphology, photosynthetic rate, chlorophyll fluorescence, stomatal development, light response curve, and nitrogen content. In this study, lettuce plants (Lactuca sativa L.) were exposed to 200 mu mol.m-2.s(-1) irradiance for a 16 h.d(-1) photoperiod under the following six treatments: monochromatic red light (R), monochromatic blue light (B) and the mixture of R and B with different R/B ratios of 12, 8, 4, and 1. Leaf photosynthetic capacity (A(max)) and photosynthetic rate (P-n) increased with decreasing R/B ratio until 1, associated with increased stomatal conductance, along with significant increase in stomatal density and slight decrease in stomatal size. P-n and A(max) under B treatment had 7.6 and 11.8% reduction in comparison with those under R/B = 1 treatment, respectively. The effective quantum yield of PSII and the efficiency of excitation captured by open PSII center were also significantly lower under B treatment than those under the other treatments. However, shoot dry weight increased with increasing R/B ratio with the greatest value under R/B = 12 treatment. The increase of shoot dry weight was mainly caused by increasing leaf area and leaf number, but no significant difference was observed between R and R/B = 12 treatments. Based on the above results, we conclude that quantitative B could promote photosynthetic performance or growth by stimulating morphological and physiological responses, yet there was no positive correlation between P-n and shoot dry weight accumulation.
学科主题	Plant Sciences
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000371697600001
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19706]
专题	农业环境与可持续发展研究所
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100193, Peoples R China 2.Minist Agr, Key Lab Energy Conservat & Waste Management Agr S, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jun,Lu, Wei,Tong, Yuxin,et al. Leaf Morphology, Photosynthetic Performance, Chlorophyll Fluorescence, Stomata! Development of Lettuce (Lactuca sativa L.) Exposed to Different Ratios of Red Light to Blue Light[J]. FRONTIERS IN PLANT SCIENCE,2016,7:-.
APA	Wang, Jun,Lu, Wei,Tong, Yuxin,&Yang, Qichang.(2016).Leaf Morphology, Photosynthetic Performance, Chlorophyll Fluorescence, Stomata! Development of Lettuce (Lactuca sativa L.) Exposed to Different Ratios of Red Light to Blue Light.FRONTIERS IN PLANT SCIENCE,7,-.
MLA	Wang, Jun,et al."Leaf Morphology, Photosynthetic Performance, Chlorophyll Fluorescence, Stomata! Development of Lettuce (Lactuca sativa L.) Exposed to Different Ratios of Red Light to Blue Light".FRONTIERS IN PLANT SCIENCE 7(2016):-.