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Developmental changes in the surface properties of chloroplast membranes

โœ Scribed by Timothy Treffry

Publisher
Springer-Verlag
Year
1975
Tongue
English
Weight
419 KB
Volume
126
Category
Article
ISSN
0032-0935

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โœฆ Synopsis

When the surface properties of etioplast and etiochloroplast membranes from dark grown or variously illuminated leaves of Avena sativa L. are examined by counter current distribution in a Dcxtran:poly(ethylene-glycol)two-phase system the results may be summarized as follows:

(i) Etioplast membranes consist of two main classes with respect to upper phase poly(ethylene-glycol) affinity.

(ii) Shortly after illumination the proportion of higher affinity membranes increases and the upper phase affinity of this class also increases.

(iii) Further illumination reverses this effect producing a single class of membranes with the high affinity for the lower phase characteristic of membranes of the mature chloroplast.

(iv) In rapidly greening leaves (6-9 h illumination) and intermediate class is observed which may represent an intermediate stage in biogenesis.

The interpretation of these results is discussed in terms of changes in membrane surface reaction and potential.

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