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Titolo:
CHLOROPHYLL A B-BINDING PROTEINS, PIGMENT CONVERSIONS, AND EARLY LIGHT-INDUCED PROTEINS IN A CHLOROPHYLL B-LESS BARLEY MUTANT/
Autore:
KROL M; SPANGFORT MD; HUNER NPA; OQUIST G; GUSTAFSSON P; JANSSON S;
Indirizzi:
UMEA UNIV,DEPT PLANT PHYSIOL S-90187 UMEA SWEDEN UMEA UNIV,DEPT PLANT PHYSIOL S-90187 UMEA SWEDEN UNIV WESTERN ONTARIO,DEPT PLANT SCI LONDON ON N6A 5B7 CANADA LUND UNIV,CTR CHEM,DEPT BIOCHEM S-22100 LUND SWEDEN
Titolo Testata:
Plant physiology
fascicolo: 3, volume: 107, anno: 1995,
pagine: 873 - 883
SICI:
0032-0889(1995)107:3<873:CABPPC>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
HORDEUM-VULGARE L; COMPLEX LHC-II; PHOTOSYSTEM-II; HARVESTING COMPLEX; HIGHER-PLANTS; ZEAXANTHIN; SUBPOPULATIONS; POLYPEPTIDES; CHLOROPLASTS; CAROTENE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
55
Recensione:
Indirizzi per estratti:
Citazione:
M. Krol et al., "CHLOROPHYLL A B-BINDING PROTEINS, PIGMENT CONVERSIONS, AND EARLY LIGHT-INDUCED PROTEINS IN A CHLOROPHYLL B-LESS BARLEY MUTANT/", Plant physiology, 107(3), 1995, pp. 873-883

Abstract

Monospecific polyclonal antibodies have been raised against syntheticpeptides derived from the primary sequences from different plant light-harvesting Chl a/b-binding (LHC) proteins. Together with other monospecific antibodies, these were used to quantify the levels of the 10 different LHC proteins in wild-type and chlorina 12 barley (Hordeum vulgare L.), grown under normal and intermittent light (ImL). Chlorina 12, grown under normal light, lacked Lhcb1 (type I LHC II) and Lhcb6 (CP24) and had reduced amounts of Lhcb2, Lhcb3 (types II and III LHC II),and Lhcb4 (CP 29). Chlorina f2 grown under ImL lacked all LHC proteins, whereas wild-type ImL plants contained Lhcb5 (CP 26) and a small amount of Lhcb2. The chlorina f2 ImL thylakoids were organized in large parallel arrays, but wild-type ImL thylakoids had appressed regions, indicating a possible role for Lhcb5 in grana stacking. Chlorina f2 grown under ImL contained considerable amounts of violaxanthin (2-3/reaction center), representing a pool of phototransformable xanthophyll cycle pigments not associated with LHC proteins. Chlorina f2 and the plants grown under ImL also contained early light-induced proteins (ELIPs)as monitored by western blotting. The levels of both ELIPs and xanthophyll cycle pigments increased during a 1 h of high light treatment, without accumulation of LHC proteins. These data are consistent with the hypothesis that ELIPs are pigment-binding proteins, and we suggest that ELIPs bind photoconvertible xanthophylls and replace ''normal'' LHC proteins under conditions of light stress.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 19:27:41