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Effects of red and blue light on leaf anatomy, CO2 assimilation and the photosynthetic electron transport capacity of sweet pepper (Capsicum annuum L.) seedlings.
Li, Yan; Xin, Guofeng; Liu, Chang; Shi, Qinghua; Yang, Fengjuan; Wei, Min.
Afiliación
  • Li Y; College of Horticultural Science and Engineering, Shandong Agricultural University, Tai'an, China.
  • Xin G; Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region, Ministry of Agriculture, Tai'an, China.
  • Liu C; Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, Tai'an, China.
  • Shi Q; State Key Laboratory of Crop Biology, Tai'an, 271018, China.
  • Yang F; College of Horticultural Science and Engineering, Shandong Agricultural University, Tai'an, China.
  • Wei M; Entomology and Nematology Department, University of Florida, 1881 Natural Area Dr, Gainesville, FL, USA.
BMC Plant Biol ; 20(1): 318, 2020 Jul 06.
Article en En | MEDLINE | ID: mdl-32631228
BACKGROUND: The red (R) and blue (B) light wavelengths are known to influence many plant physiological processes during growth and development, particularly photosynthesis. To understand how R and B light influences plant photomorphogenesis and photosynthesis, we investigated changes in leaf anatomy, chlorophyll fluorescence and photosynthetic parameters, and ribulose-1, 5-bisphosphate carboxylase/oxygenase (Rubisco) and Calvin cycle-related enzymes expression and their activities in sweet pepper (Capsicum annuum L.) seedlings exposed to four light qualities: monochromatic white (W, control), R, B and mixed R and B (RB) light with the same photosynthetic photon flux density (PPFD) of 300 µmol/m2·s. RESULTS: The results revealed that seedlings grown under R light had lower biomass accumulation, CO2 assimilation and photosystem II (PSII) electron transportation compared to plants grown under other treatments. These changes are probably due to inactivation of the photosystem (PS). Biomass accumulation and CO2 assimilation were significantly enriched in B- and RB-grown plants, especially the latter treatment. Their leaves were also thicker, and photosynthetic electron transport capacity, as well as the photosynthetic rate were enhanced. The up-regulation of the expression and activities of Rubisco, fructose-1, 6-bisphosphatase (FBPase) and glyceraldehyde-phosphate dehydrogenase (GAPDH), which involved in the Calvin cycle and are probably the main enzymatic factors contributing to RuBP (ribulose-1, 5-bisphosphate) synthesis, were also increased. CONCLUSIONS: Mixed R and B light altered plant photomorphogenesis and photosynthesis, mainly through its effects on leaf anatomy, photosynthetic electron transportation and the expression and activities of key Calvin cycle enzymes.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Ribulosa-Bifosfato Carboxilasa / Capsicum / Dióxido de Carbono / Transporte de Electrón Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2020 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Ribulosa-Bifosfato Carboxilasa / Capsicum / Dióxido de Carbono / Transporte de Electrón Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2020 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido