alexa A method for high-frequency intergeneric fusion of plant protoplasts.
General Science

General Science

Journal of Forensic Biomechanics

Author(s): Kao KN, Michayluk MR

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Protoplasts of Vicia hajastana Grossh. obtained from suspension-culture cells and Pisum sativum L. obtained from leaves adhered tightly to each other in concentrated solutions of high-molecular-weight polyethylene glycol (PEG). The adhesion occurred non-specifically between the free protoplasts from the same species as well as from the different species and genus. It was enhanced by enrichment of the PEG solution with calcium. Very few heteroplasmic fusions occurred during the period when the protoplasts were incubated in the PEG solution. However, many heterokaryons (up to 10%) were formed soon after the PEG solution was diluted out. The same phenomena were also observed in protoplasts from suspension-culture cells of Glycine max L. and from leaves of Hordeum vulgare L. Vicia and soybean protoplasts obtained from cultured cells regenerated cell walls and underwent sustained cell division after such treatment. Some Vicia-pea heterokaryons divided once. Over 10% of the soybean-barley hybrids divided in 7 days. Some divided 4–5 times and formed small clusters of cells in 10 days. The hybrids were recognizable because they contained chloroplasts from the leaf protoplast and exhibited morphological characters typical of the chlorophyll-less cells. None of the protoplasts from pea and barley leaves, either with or without PEG treatment, underwent cell division during the period of observation. The mechanism of adhesion and fusion of the protoplasts has been discussed.

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This article was published in Planta and referenced in Journal of Forensic Biomechanics

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