Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions

Peter E, Rothbart M, Oelze M-L, Shalygo N, Dietz K-J, Grimm B (2010)
PLANT AND CELL PHYSIOLOGY 51(7): 1229-1241.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
Download
Es wurde kein Volltext hochgeladen. Nur Publikationsnachweis!
Autor/in
; ; ; ; ;
Abstract / Bemerkung
Mg protoporphyrin monomethylester (MgProtoME) cyclase catalyzes isocyclic ring formation to form divinyl protochlorophyllide. The CHL27 protein is part of the cyclase complex. Deficiency of CHL27 has been previously reported to compromise photosynthesis and nuclear gene expression. In a comprehensive analysis of different CHL27 antisense tobacco lines grown under different light conditions, the physiological consequences of gradually reduced CHL27 expression on the tetrapyrrole biosynthetic pathway were explored. Excessive amounts of MgProtoME, the substrate of the cyclase reaction, accumulated in response to the reduced CHL27 content. Moreover, 5-aminolevulinic acid (ALA) synthesis, Mg chelatase and Mg protoporphyrin methyltransferase activities were reduced in transgenic plants. Compared with growth under continuous light exposure, the CHL27-deficient plants showed a stronger reduction in Chl content, cell death and leaf necrosis during diurnal light/dark cycles. This photooxidative phenotype correlated with a rapidly increasing MgProtoME steady-state level at the beginning of each light period. In contrast, the same transformants grown under continuous light exposure possessed a permanently elevated amount of MgProtoME. Its lower phototoxicity correlated with increased activities of ascorbate peroxidase and catalase, and a higher amount of reduced ascorbate. It is proposed that improved stress acclimation during continuous light in comparison with light-dark growth increases the capacity to prevent photo-oxidation by excess tetrapyrrole precursors and lowers the susceptibility to secondary photodynamic damage.
Stichworte
Chlorophyll; Photooxidation; Photosensitization; Tetrapyrrole biosynthesis; Tobacco; Mg protoporphyrin monomethylester cyclase
Erscheinungsjahr
2010
Zeitschriftentitel
PLANT AND CELL PHYSIOLOGY
Band
51
Ausgabe
7
Seite(n)
1229-1241
ISSN
0032-0781
eISSN
1471-9053
Page URI
https://pub.uni-bielefeld.de/record/1794568

Zitieren

Peter E, Rothbart M, Oelze M-L, Shalygo N, Dietz K-J, Grimm B. Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions. PLANT AND CELL PHYSIOLOGY. 2010;51(7):1229-1241.
Peter, E., Rothbart, M., Oelze, M. - L., Shalygo, N., Dietz, K. - J., & Grimm, B. (2010). Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions. PLANT AND CELL PHYSIOLOGY, 51(7), 1229-1241. doi:10.1093/pcp/pcq071
Peter, E., Rothbart, M., Oelze, M. - L., Shalygo, N., Dietz, K. - J., and Grimm, B. (2010). Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions. PLANT AND CELL PHYSIOLOGY 51, 1229-1241.
Peter, E., et al., 2010. Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions. PLANT AND CELL PHYSIOLOGY, 51(7), p 1229-1241.
E. Peter, et al., “Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions”, PLANT AND CELL PHYSIOLOGY, vol. 51, 2010, pp. 1229-1241.
Peter, E., Rothbart, M., Oelze, M.-L., Shalygo, N., Dietz, K.-J., Grimm, B.: Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions. PLANT AND CELL PHYSIOLOGY. 51, 1229-1241 (2010).
Peter, Enrico, Rothbart, Maxi, Oelze, Marie-Luise, Shalygo, Nikolai, Dietz, Karl-Josef, and Grimm, Bernhard. “Mg Protoporphyrin Monomethylester Cyclase Deficiency and Effects on Tetrapyrrole Metabolism in Different Light Conditions”. PLANT AND CELL PHYSIOLOGY 51.7 (2010): 1229-1241.

Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®

Quellen

PMID: 20460500
PubMed | Europe PMC

Suchen in

Google Scholar