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022 _a0176-1617
040 _aMSU
_bEnglish
_cMSU
_erda
050 0 0 _aQK711.2 JOU
100 1 _aDobrikova, Anelia G.
_eauthor
245 1 0 _aDamage and protection of the photosynthetic apparatus from UV-B radiation. II. Effect of quercetin at different pH
_ccreated by Anelia G. Dobrikova and Emilia L. Apostolova
264 1 _aAmsterdam:
_bElsevier GmbH,
_c2015.
336 _2rdacontent
_atext
_btxt
337 _2rdamedia
_aunmediated
_bn
338 _2rdacarrier
_avolume
_bnc
440 _aJournal of plant physiology
_vVolume 184
520 3 _aThe effect of the exogenously added quercetin against the UV-B inhibition of the photosystem II (PSII) functions in isolated pea thylakoid membranes suspended at different pH of the medium (6.5, 7.6 and 8.4) was investigated. The data revealed that the interaction of this flavonoid with the membranes depends on the pH and influences the initial S0-S1 state distribution of PSII in the dark, the energy transfer between pigment-protein complexes of the photosynthetic apparatus and the membrane fluidity. Quercetin also displays a different UV-protective effect depending on its location in the membranes, as the effect is more pronounced at pH 8.4 when it is located at the membrane surface. The results suggest that quercetin induces structural changes in thylakoid membranes, one of the possible reasons for its protection of the photosynthetic apparatus.
650 _aLow-temperature chlorophyll fluorescence
_vPea thylakoid membranes
_xPhotosynthetic oxygen evolution;
700 1 _aApostolova, Emilia L.
_eco-author
856 _uhttps://doi.org/10.1016/j.jplph.2015.06.008
942 _2lcc
_cJA
999 _c168880
_d168880