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A light and electron-microscope study of Picea glauca (White spruce) somatic embryos
Institute of Physiological Botany, University of Uppsala.
1987 (English)In: Protoplasma, ISSN 0033-183X, E-ISSN 1615-6102, Vol. 140, no 2-3, p. 100-109Article in journal (Refereed) Published
Abstract [en]

Somatic embryos in embryogenic callus cultures derived fromimmature zygotic embryos of Picea glauca (White spruce) wereexamined by light and electron microscopy. Somatic embryos consistof an embryonic region of small densely cytoplasmic cells subtendedby a suspensor consisting of long highly vaeuolated cells. Mitoticfigures are frequent in the embryonic cells but are not observed in thesuspensor. Cell divisions in the embryonic region apparently producerows of cells which elongate to form the suspensor. The presence ofabundant polysomes, coated membranes and dictyosomes in thecytoplasm of embryonic and upper suspensor cells suggests rapidgrowth of the embryo. In contrast the basipetal suspensor cellsappear to be senescing. While only a few scattered microfilaments arepresent in the meristematic celIs, the upper suspensor cells containnumerous bundles of longitudinally oriented microfitaments. Thesebundles correspond to actin cables observed in light microscopepreparations stained with rhodamine labelled phalloidin and areoriented parallel to the direction of active streaming in these cells. 

Place, publisher, year, edition, pages
1987. Vol. 140, no 2-3, p. 100-109
National Category
Biological Sciences
Research subject
Natural Science, Cell and Organism Biology
Identifiers
URN: urn:nbn:se:lnu:diva-987DOI: 10.1007/BF01273718OAI: oai:DiVA.org:lnu-987DiVA, id: diva2:307770
Available from: 2010-04-01 Created: 2010-04-01 Last updated: 2017-12-12Bibliographically approved

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Hakman, Inger

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