Insight into details of the photosynthetic light reactions and selected metabolic changes in tomato seedlings growing under various light spectra

0552843 - ÚEB 2022 RIV CH eng J - Journal Article
Kula-Maximenko, M. - Niewiadomska, E. - Maksymowicz, A. - Ostrowska, A. - Oklešťková, Jana - Pěnčík, Aleš - Janeczko, A.
Insight into details of the photosynthetic light reactions and selected metabolic changes in tomato seedlings growing under various light spectra.
International Journal of Molecular Sciences. Roč. 22, č. 21 (2021), č. článku 11517. E-ISSN 1422-0067
R&D Projects: GA MŠMT(CZ) EF16_019/0000827
Institutional support: RVO:61389030
Keywords : Auxins * Brassinosteroids * Light spectral composition * Photosynthesis * Plant growth * Solanum lycopersicum L
OECD category: Biochemistry and molecular biology
Impact factor: 6.208, year: 2021
Method of publishing: Open access
http://doi.org/10.3390/ijms222111517

The objective of our study was to characterise the growth of tomato seedlings under various light spectra, but special attention has been paid to gaining a deeper insight into the details of photosynthetic light reactions. The following light combinations (generated by LEDs, constant light intensity at 300 µmol m−2 s−1) were used: blue/red light, blue/red light + far red, blue/red light + UV, white light that was supplemented with green, and white light that was supplemented with blue. Moreover, two combinations of white light for which the light intensity was changed by imitating the sunrise, sunset, and moon were also tested. The reference point was also light generated by high pressure sodium lamps (HPS). Plant growth/morphological parameters under various light conditions were only partly correlated with the photosynthetic efficiency of PSI and PSII. Illumination with blue/red as the main components had a negative effect on the functioning of PSII compared to the white light and HPS-generated light. On the other hand, the functioning of PSI was especially negatively affected under the blue/red light that was supplemented with FR. The FT-Raman studies showed that the general metabolic profile of the leaves (especially proteins and β-carotene) was similar in the plants that were grown under the HPS and under the LED-generated white light for which the light intensity changed during a day. The effect of various light conditions on the leaf hormonal balance (auxins, brassinosteroids) is also discussed.
Permanent Link: http://hdl.handle.net/11104/0327937