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PLASTIDS IN LATICIFERS OF PAPAVER. I. DEVELOPMENT AND CYTOCHEMISTRY OF LATICIFER PLASTIDS IN P. SOMNIFERUM L. (PAPAVERACEAE)
Author(s) -
Nessler Craig L.,
Mahlberg Paul G.
Publication year - 1979
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1979.tb06223.x
Subject(s) - plastid , biology , papaver , papaveraceae , cytochemistry , amyloplast , thylakoid , chloroplast , ultrastructure , botany , plantago ovata , tapetum , biochemistry , pollen , stamen , alkaloid , microspore , gene
Plastids were observed in all stages of laticifer differentiation in Papaver somniferum L. Plastids in laticifer initials were present as proplastids that later developed electron‐dense inclusions, but never possessed the thylakoids or starch grains that characterize chloroplasts in other cells. Electron‐dense inclusions in laticifer plastids were membrane‐bound and appeared to arise from the accumulation of material within an invagination of the inner plastid membrane. Cytochemical studies of these plastid inclusions indicated that their matrix was not composed of crystalline protein, α‐amylose, amylopectin or polysaccharide. The results suggest that the electron‐dense, membrane‐bound inclusions in laticifer plastids may be composed of lipoprotein.