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Internal Grant Competition DGC





Impact of temperature and photosynthetically active radiation on dynamics of regulation of photosystem II function in higher plants
Project Id13-28093S
Main solverdoc. RNDr. Vladimír Špunda, CSc.
Periodr2/2013 - 12/2016
ProviderStandardní projekt GA ČR
Statefinished
AnotationAssimilatory apparatus of higher plants is permanently exposed to variable environments, among which intensity of photosynthetically active radiation (PAR) and temperature can change dramatically in rapid time-scale. The zeaxanthin and PsbS dependent nonradiative dissipation of absorbed light within PS II (NRD) have been extensively studied as a crucial protective process mitigating oxidative damage of thylakoid membranes under high-light stress. However, considerably less information is available on the role of this regulatory mechanism in response of plants to elevated temperatures in combination with different PAR intensities. The project proposal is aimed to provide new information on impact of temperature and light on dynamics of regulation of PS II function with focus on: 1, explanation of the factors that determine the species-specific differences of NRD role in PS II protection; 2, characterization of the role of different dynamics of NRD regulation on photosynthetic performance of plants under natural changes of light and temperature during vegetation period.