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PRELIMINARY OBSERVATIONS ON THE ULTRASTRUCTURE OF MATURING CORK‐CELLS FROM TUBERS OF SOLANUM TUBEROSUM L.
Author(s) -
RAINBOW ARNOLD,
WHITE D. J. B.
Publication year - 1972
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.1469-8137.1972.tb01970.x
Subject(s) - cytoplasm , ultrastructure , solanum tuberosum , vacuole , cork , cell wall , vesicle , endoplasmic reticulum , ribosome , biology , botany , microbiology and biotechnology , membrane , biochemistry , rna , gene
S ummary The normal cork of young tubers of Solanum tuberosum L. cv.‘King Edward’ was used as a source of maturing cork‐cells. The cells are periclinally flattened and highly vacuolated. Electron‐micrographs reveal that the cytoplasm, although sparse, is rich in mitochondria, ribosomes and membrane‐bound vesicles. Electron‐opaque crystals and endoplasmic reticulura are also present, but neither the plasmalemma, nor the tonoplast, are visible. Microtubules are seen at the interface between the cell wall and the cytoplasm. The layered appearance of the cell wall is compatible with the observations of other workers. No pits are visible but there is evidence that plasmadesmata were present earlier in the ontogeny of the cell. The significance of these observations is discussed in the light of existing information on cork‐cell differentiation.