Abstract
The photosynthetic properties of four strains of free-living green terrestrial algae (Diplosphaera chodatii Bial., Parietochloris ovoideus Mikhailyuk et Demchenko, Myrmecia bisecta Reisigl, and Trentepohlia sp.) and two strains of green photobionts of lichens (Radiococcus signiensis (Broady) Kostikov et al. and Trebouxia australis Beck) were studied. As a result of our work the optimum light intensity for cultivating algae strains at a relative humidity of 45% was found: for Trentepohlia was ≤ 100 FEM / (m2·s), Radiococcus and Trebouxia ≤ 200 FEM / (m2·s), Parietochloris ≤ 400 FEM / (m2·s), and Diplosphaera and Myrmecia ≤ 800 FEM / (m2·s). Moreover, it was revealed that Trentepohlia sp., R. signiensis and T. australis are vulnerable to light, while M. bisecta, P. ovoideus, and D. chodatii are well adapted to intensive illumination. However, the strains T. australis and D. chodatii in their groups withstand high-speed photochemical damage even under optimal light intensity.
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