Article (Scientific journals)
Protochlorophyllide phototransformation in the bundle sheath cells of Zea mays
Dewez, D.; Franck, Fabrice; Popovic, R. et al.
2004In Journal of Photochemistry and Photobiology B: Biology, 75 (1-2), p. 73-80
Peer Reviewed verified by ORBi
 

Files


Full Text
2004 Marchand_etal_JPP.pdf
Publisher postprint (327.97 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
chlorophyll biosynthesis; C-4 plant; photosystems assembly; protochlorophyllide phototransformation; Zea mays
Abstract :
[en] The protochlorophyllide transformation process was investigated by using comparative analysis of 77 K fluorescence spectral changes occurring in isolated bundle sheath (BS) cells of etiolated Zea mays leaves after being exposed to a 200 ms saturating flash. Deconvolution analysis of the fluorescence spectra showed essential differences in the ratio of protochlorophyll(ides) and chlorophyll(ides) spectral forms indicating for BS cells to have a characteristic pathway of protochlorophyllide transformation. Bundle sheath cells showed a high ratio between non-photoactive protochlorophyll(ide)-F632 and photoactive protochlorophyllide-F655. In those cells, the 200 ins flash triggered a preferential formation of chlorophyll(ide)-F675 which remained stable in the dark for at least 90 min. Isolated BS cells showed an accumulation of chlorophyll(ide)-F675 resulting in the formation of inactive photosystem II. However for mesophyll cells of intact leaves, it was found to have a high ratio between photoactive and non-photoactive protochlorophyll(ide), showing the succession of chlorophyll(ide) forms usually known in C-3 plants. Protochlorophyllide phototransformation pathway in BS cells related to early stages of plastid differentiation triggered by light may indicate specific conditions for PSII assembly process leading to inactive PSII forms. (C) 2004 Elsevier B.V. All rights reserved.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Dewez, D.
Franck, Fabrice ;  Université de Liège - ULiège > Département des sciences de la vie > Biochimie végétale
Popovic, R.
Marchand, M.
Language :
English
Title :
Protochlorophyllide phototransformation in the bundle sheath cells of Zea mays
Publication date :
19 July 2004
Journal title :
Journal of Photochemistry and Photobiology B: Biology
ISSN :
1011-1344
Publisher :
Elsevier Science Sa, Lausanne, Switzerland
Volume :
75
Issue :
1-2
Pages :
73-80
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 May 2010

Statistics


Number of views
44 (1 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
6
Scopus citations®
without self-citations
6
OpenCitations
 
6

Bibliography


Similar publications



Contact ORBi