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Continuity of chloroplast and endoplasmic reticulum membranes in Phaseolus vulgaris
Author(s) -
WHATLEY J. M.,
McLEAN B.,
JUNIPER B. E.
Publication year - 1991
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1991.tb04901.x
Subject(s) - phaseolus , plastid , endoplasmic reticulum , chloroplast , amyloplast , organelle , botany , biology , chloroplast membrane , membrane , microbiology and biotechnology , biochemistry , thylakoid , gene
summary In cells of young primary leaves of Phaseolus vulgaris , the ER briefly, but regularly, forms a partial sheath around the plastids or lies in dose proximity to them. We have shown previously that, when ER encircles the chloroplasts in the lower vascular plant Equisetum telmateia , the ER membrane can become continuous with the outer membrane of the plastid envelope. It is now apparent that similar membrane continuity can become established between the ER and plastids in the angiosperm, Phaseolus vulgaris , though the period of organelle association is of much shorter duration than in Equisetum and it is characteristic only of the earlier stages of amyloplast development. A comparison is made of the relative timings of association of ER with protein bodies and mitochondria as well as with plastids.