Light quality regulates plant biomass and fruit quality through a photoreceptor-dependent HY5-LHC/CYCB module in tomato
Author:
Yan Jiarong1, Liu Juan1, Yang Shengdie1, Jiang Chenghao1, Liu Yanan1, Zhang Nan1, Sun Xin2, Zhang Ying1, Zhu Kangyou1, Peng Yinxia1, Bu Xin1, Wang Xiujie1, Ahammed Golam Jalal34, Meng Sida1, Tan Changhua1, Liu Yufeng1, Sun Zhouping1, Qi Mingfang1, Wang Feng15ORCID, Li Tianlai15ORCID
Affiliation:
1. Shenyang Agricultural University College of Horticulture, , Shenyang 110866, China 2. Shenyang Agricultural University College of Land and Environment, , Shenyang 110866, China 3. Henan University of Science and Technology College of Horticulture and Plant Protection, , Luoyang 471023, China 4. Henan International Joint Laboratory of Stress Resistance Regulation and Safe Production of Protected Vegetables , Luoyang, 471023, China 5. Key Laboratory of Protected Horticulture, Ministry of Education , Shenyang 110866, China
Abstract
Abstract
Increasing photosynthesis and light capture offers possibilities for improving crop yield and provides a sustainable way to meet the increasing global demand for food. However, the poor light transmittance of transparent plastic films and shade avoidance at high planting density seriously reduce photosynthesis and alter fruit quality in vegetable crops, and therefore it is important to investigate the mechanisms of light signaling regulation of photosynthesis and metabolism in tomato (Solanum lycopersicum). Here, a combination of red, blue, and white (R1W1B0.5) light promoted the accumulation of chlorophyll, carotenoid, and anthocyanin, and enhanced photosynthesis and electron transport rates by increasing the density of active reaction centers and the expression of the genes LIGHT-HARVESTING COMPLEX B (SlLHCB) and A (SlLHCA), resulting in increased plant biomass. In addition, R1W1B0.5 light induced carotenoid accumulation and fruit ripening by decreasing the expression of LYCOPENE β-CYCLASE (SlCYCB). Disruption of SlCYCB largely induced fruit lycopene accumulation, and reduced chlorophyll content and photosynthesis in leaves under red, blue, and white light. Molecular studies showed that ELONGATED HYPOCOTYL 5 (SlHY5) directly activated SlCYCB, SlLHCB, and SlLHCA expression to enhance chlorophyll accumulation and photosynthesis. Furthermore, R1W1B0.5 light-induced chlorophyll accumulation, photosynthesis, and SlHY5 expression were largely decreased in the slphyb1cry1 mutant. Collectively, R1W1B0.5 light noticeably promoted photosynthesis, biomass, and fruit quality through the photoreceptor (SlPHYB1 and SlCRY1)-SlHY5-SlLHCA/B/SlCYCB module in tomato. Thus, the manipulation of light environments in protected agriculture is a crucial tool to regulate the two vital agronomic traits related to crop production efficiency and fruit nutritional quality in tomato.
Funder
the Innovative Research Team (Science and Technology) in University of Henan Province Ministry of Science and Technology of the People’s Republic of China the Young and Middle-aged Science and Technology Innovation Talent Support Program in Shenyang the Liao Ning Revitalization Talents Program National Natural Science Foundation of China the National Key Research and Development Program of China Natural Science Foundation of Liaoning Province for Excellent Youth
Publisher
Oxford University Press (OUP)
Subject
Horticulture,Plant Science,Genetics,Biochemistry,Biotechnology
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