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Titolo:
COLD-ACCLIMATION AND PHOTOINHIBITION OF PHOTOSYNTHESIS IN SCOTS PINE
Autore:
KRIVOSHEEVA A; TAO DL; OTTANDER C; WINGSLE G; DUBE SL; OQUIST G;
Indirizzi:
UMEA UNIV,DEPT PLANT PHYSIOL S-90187 UMEA SWEDEN UMEA UNIV,DEPT PLANT PHYSIOL S-90187 UMEA SWEDEN URAL FOREST TECHNOL INST,DEPT BIOPHYS EKATERINBURG 620032 RUSSIA ACAD SINICA,INST APPL ECOL SHENYANG 110015 PEOPLES R CHINA SWEDISH UNIV AGR SCI,FAC FORESTRY,DEPT FOREST GENET & PLANT PHYSIOL S-90183 UMEA SWEDEN LUND UNIV,DEPT PLANT PHYSIOL S-22027 LUND SWEDEN
Titolo Testata:
Planta
fascicolo: 3, volume: 200, anno: 1996,
pagine: 296 - 305
SICI:
0032-0935(1996)200:3<296:CAPOPI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; LIGHT-RESPONSE CURVE; CHLOROPHYLL FLUORESCENCE; HYDROGEN-PEROXIDE; PHOTOSYSTEM-II; SYLVESTRIS L; CHLAMYDOMONAS-REINHARDTII; SPINACH-CHLOROPLASTS; SUPEROXIDE-DISMUTASE; QUANTUM YIELD;
Keywords:
FROST HARDENING; LOW TEMPERATURE; PHOTOINHIBITION; PHOTOSYSTEM II; PINUS; SCAVENGING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
61
Recensione:
Indirizzi per estratti:
Citazione:
A. Krivosheeva et al., "COLD-ACCLIMATION AND PHOTOINHIBITION OF PHOTOSYNTHESIS IN SCOTS PINE", Planta, 200(3), 1996, pp. 296-305

Abstract

Cold acclimation of Scots pine did not affect the susceptibility of photosynthesis to photoinhibition. Cold acclimation did however cause asuppression of the rate of CO2 uptake, and at given light and temperature conditions a larger fraction of the photosystem Il reaction centres were closed in cold-acclimated than in nonacclimated pine. Therefore, when assayed at the level of photosystem II reaction centres, i.e. in relation to the degree of photosystem closure, cold acclimation caused a significant increase in resistance to photoinhibition; at given levels of photosystem II closure the resistance to photoinhibition washigher after cold acclimation. This was particularly evident in measurements at 20 degrees C. The amounts and activities of the majority ofanalysed active oxygen scavengers were higher after cold acclimation. We suggest that this increase in protective enzymes and compounds, particularly superoxide dismutase, ascorbate peroxidase, glutathione reductase and ascorbate of the chloroplasts, enables Scots pine to avoid excessive photoinhibition of photosynthesis despite partial suppression of photosynthesis upon cold acclimation. An increased capacity for light-induced de-epoxidation of violaxanthin to zeaxanthin upon cold acclimation may also be of significance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 18:25:15