Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI
În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.
Autori: VICTOR BERCEA, ADRIANA HEGEDŰS (BICA), NICOLAE DRAGOŞ, COSMIN SICORA.
The changes in chlorophyll fluorescence during a two hour period of high light were analyzed in cyanobacterium Nostoc linckia AICB 421. A light intensity of 800 µmoli.m-2.s-1 induced the decrease of Fm, Fv and maximal and effective quantum yield. In conditions of exposure to 1500 µmoli.m-2.s-1, F0, Fm, Fv and maximal and effective quantum yield decreased also, relative to control. A 2100 µmoli.m-2.s-1 light intensity increased the F0, Fm and Fv and the quantum yield values lowered. Photochemical coefficients maintained maximal values. Quantum yield of non-regulated energy dissipation Y(NO) was enhanced. Changes in chlorophyll fluorescence were caused by structural changes in the antenna and in the PSII reaction center, due to light stress.
Keywords: minimal and maximal fluorescence, maximal and effective quantum yield, quantum yield of nonregulated energy dissipation, coefficient of photochemical quenching, phycobilisomes.
