The development of antenna complexes of barley (Hordeum vulgare cv. Akcent) under different light conditions as judged from the analysis of 77 K chlorophyll a fluorescence spectra.
作者： M. Čajánek , M. Navrátil , I. Kurasová , J. Kalina , V. Špunda
关键词: Fluorescence intensity 、 Fluorescence spectra 、 Carotenoid 、 Greening 、 Hordeum vulgare 、 Photochemistry 、 Chemistry 、 Plant physiology 、 Photosystem 、 Chlorophyll a
摘要: Using 77 K chlorophyll a (Chl a) fluorescence spectra in vivo, the development was studied of Photosystems II (PS II) and I I) during greening barley under intermittent light followed by continuous at low (LI, 50 mumol m(-2) s(-1)) high (HI, 1000 irradiances. The HI accompanied with significantly reduced intensity from Chl b excitation for both PS (F685) (F743), comparison LI plants, indicating that assembly light-harvesting complexes (LHC) photosystems affected to similar degree. During HI, slower increase emission as compared observed, preferred reduction accumulation LHC II. following characteristics documented photoprotective function an elevated content carotenoids leaves: (1) pronounced suppression Soret region (410-450 nm) red (670-690 early stage indicated strongly energy transfer fluorescing forms within II; (2) changes shape band (460-490 confirmed remained lower plants.
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