Effect of diuron on the photosynthetic apparatus of anabaena variabilis

Andreev, V.P.; Maslov, Y.I.; Nasonova, E.A.

Vestnik Leningradskogo Universiteta Biologiya 4: 65-69


Accession: 005234561

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A. variabilis (strain 458) is capable to photoautotrophic growth in the presence of DCMU [3-(3,4-dichlorophenyl)-1,1-dimethylurea, diuron] at concentration inhibiting photosynthetic activity by 80%. DCMU in the growing medium decreased the chlorophyll in the cells and increased the amount of phycobilin light-harvesting complex and carotenoids. The light stability of pigment apparatus in DCMU - modified cells increases and energy transfer from phycobilins to photosystem 2 is more efficient. Interrelationship of photosynthetic and respiratory processes in photoautotrophic growth is discussed.