Article (Scientific journals)
Localization of Nadph-Protochlorophyllide Reductase in Plastids of Barley at Different Greening Stages
Barthelemy, X.; Bouvier, G.; Radunz, A. et al.
2000In Photosynthesis Research, 64 (1), p. 63-76
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Abstract :
[en] The localization of protochorophyllide (Pchlide) and of NADPH-protochlorophyllide oxidoreductase (POR, EC 1.6.99.1) within (etio)chloroplasts has been investigated at selected stages of greening of barley seedlings. Pchlide pigment and POR protein contents were evaluated in different plastid membrane fractions by fluorescence spectroscopy and immunoblot analysis using a monospecific polyclonal antibody raised against the purified enzyme. Fluorescence analysis showed the presence of Pchlide in both the envelope and thylakoid membranes. During greening, the Pchlide content, expressed on a total protein basis, decreased in thylakoid membranes, whereas it increased in the envelope membranes. POR proteins were detected mainly in thylakoid membranes at early greening stages. In contrast, the weak amount of POR proteins was associated more specifically with envelope membranes of mature chloroplasts. Whatever the greening stage, thylakoid-bound Pchlide and POR proteins were more abundant in the thylakoid regions which remained unsolubilized after mild Triton treatment used as standard procedure to prepare PS II particles. This suggests the preferential association of Pchlide and POR to the appressed regions of thylakoids.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Barthelemy, X.
Bouvier, G.
Radunz, A.
De Buyl, Simone 
Schmid, G. H.
Franck, Fabrice ;  Université de Liège - ULiège > Département des sciences de la vie > Biochimie végétale
Language :
English
Title :
Localization of Nadph-Protochlorophyllide Reductase in Plastids of Barley at Different Greening Stages
Publication date :
2000
Journal title :
Photosynthesis Research
ISSN :
0166-8595
eISSN :
1573-5079
Publisher :
Kluwer Academic Publishers, Netherlands
Volume :
64
Issue :
1
Pages :
63-76
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 May 2010

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