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Effect of light quality (blue, red) and fluence rate on the synthesis of pigments and pigment‐proteins in maize and black pine mesophyll chloroplasts
Author(s) -
Milivojević Dragica,
Eskins Kenneth
Publication year - 1990
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1990.tb05688.x
Subject(s) - fluence , pigment , carotenoid , chloroplast , botany , photosynthesis , far red , pinus <genus> , blue light , photosystem ii , chemistry , biophysics , biology , horticulture , red light , biochemistry , optics , physics , ion , organic chemistry , gene
Maize ( Zea mays L. hybrid ZP‐704) and black pine ( Pinus nigra Arn.) were grown for five days at low fluence rate (0.4–4.0, μmol m –2 s −1 ) in blue or red light. Compared to red light of the same fluence rate, blue light effects in maize were repressive for the accumulation of Chita, b , carotenoids and light‐harvesting complex‐2 (LHC‐2) proteins. The maximal reduction of proteins bound to the light‐harvesting complex of photosystem 2 and pigments was attained at different fluence rate levels. In black pine, blue light compared to the red of the same fluence rate level either activated or reduced accumulation of pigments and LHC proteins, the effect being dependent on its fluence rate level. At fluence less than 3.0 μmol m −2 s −1 blue light was more efficient for the synthesis of Chi a, b and carotenoids, hut for LHC‐2 complexes, fluence rates between 0.4 and 1.5 [μmol m −2 s −1 were more effective. In pine the effects of the two lights on the accumulation of pigments and LHC proteins were demonstrated separately and were dependent on fluence rate level. This suggests irradianoe‐controlled activation/deactivation of the photoreceptor at the level of the cell.