caa a22 4500 477101135 CHVBK 20180405111541.0 cr unu---uuuuu 170330e19960201xx s 000 0 eng 10.1007/BF00206245 doi (NATIONALLICENCE)springer-10.1007/BF00206245 Kinetic correlation of recovery from photoinhibition and zeaxanthin epoxidation [Elektronische Daten] [Peter Jahns, Birgit Miehe] The generation of non-photochemical fluorescence quenching under photoinhibitory illumination and its relaxation under subsequent low light illumination in leaves from intermittent-light-grown pea (Pisum sativum L.) plants (IML-plants) has been investigated. In parallel, we studied (i) the activity of the xanthophyll cycle with emphasis on zeaxanthin formation and reconversion to violaxanthin and (ii) the degradation rate of D1 protein. In comparison to control plants grown in continuous light, IML-plants were much more susceptible to photoinhibition as determined from the increase of slowly (halftimes > 20 min) relaxing quenching (qI) of variable chlorophyll fluorescence. The relaxation (recovery) kinetics of qI (under weak light) in both types of plant depended on the photon flux density, temperature and duration of pre-illumination. The recovery time generally increased with an increasing degree of qI. In IML-plants, relaxation of qI was kinetically closely related to the epoxidation of zeaxanthin. At high degrees of photosystem II inhibition the kinetics resembled those of D1 degradation. The results are discussed in terms of the mechanisms of photosystem II inactivation in vivo. Springer-Verlag, 1996 Chlorophyll a/b -binding proteins nationallicence Fluorescence quenching nationallicence Photoinhibition nationallicence Pisum nationallicence Xanthophyll cycle nationallicence Zeaxanthin nationallicence A : antheraxanthin nationallicence CAB protein : chlorophyll a/b-binding protein nationallicence Chl : chlorophyll nationallicence CL : continuous light nationallicence FM : maximum fluorescence nationallicence FV : variable fluorescence nationallicence IML : intermittent light nationallicence PFD : photon flux density nationallicence qE : energy-dependent fluorescence quenching nationallicence qI : photoinhibitory fluorescence quenching nationallicence SM : streptomycin nationallicence V : violaxanthin nationallicence Z : zeaxanthin nationallicence Jahns Peter Institut für Biochemie der Pflanzen, Heinrich-Heine-Universtät Düsseldorf, Universitätsstrasse 1, D-40225, Düsseldorf, Germany aut Miehe Birgit Institut für Biochemie der Pflanzen, Heinrich-Heine-Universtät Düsseldorf, Universitätsstrasse 1, D-40225, Düsseldorf, Germany aut Planta Springer-Verlag 198/2(1996-02-01), 202-210 0032-0935 198:2<202 1996 198 425 https://doi.org/10.1007/BF00206245 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00206245 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jahns Peter Institut für Biochemie der Pflanzen, Heinrich-Heine-Universtät Düsseldorf, Universitätsstrasse 1, D-40225, Düsseldorf, Germany aut NATIONALLICENCE 700 1- Miehe Birgit Institut für Biochemie der Pflanzen, Heinrich-Heine-Universtät Düsseldorf, Universitätsstrasse 1, D-40225, Düsseldorf, Germany aut NATIONALLICENCE 773 0- Planta Springer-Verlag 198/2(1996-02-01), 202-210 0032-0935 198:2<202 1996 198 425 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer