In vitro selection for salt tolerance in crop plants: Theoretical and practical considerations |
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Authors: | Moshe Tal |
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Institution: | (1) Department of Life Sciences, Ben Gurion University of the Negev, P.O. Box 653, 84105 Beer Sheva, Israel |
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Abstract: | Summary In recent years attempts have been made to supplement traditional breeding for the production of salt-tolerant plants with
variability existing in cell culture. The potential causes suggested as an explanation for the limited success of the in vitro
approach include: a) lack, or loss during selection, of regeneration capability; b) the development of epigenetically adapted
cells; c) lack of correlation between the mechanisms of tolerance operating in cultured cells and mechanisms that operate
in cells in the intact plant; and d) multigenicity of salt tolerance. The recent successful production of healthy, fertile,
and genetically stable salt-tolerant regenerants from cells obtained from highly morphogenic explants which are selected early
in culture (using one-step or short-term strategies) for salt tolerance, together with the demonstration that salt-sensitive
plants can become tolerant by mutations in one or few genes, suggest that some of the potential limitations can be overcome
and that some of them may not exist at all. |
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Keywords: | salt tolerance in vitro selection plants |
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