Nuclear genetic activity in B-chromosome rye,in terms of the quantitative interrelationships between nuclear protein,nuclear RNA and histone |
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Authors: | David Kirk R Neil Jones |
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Institution: | (1) Sub-Department of Genetics, Queen's University, Belfast;(2) Department of Agricultural Botany, University College of Wales, Aberystwyth, Wales UK |
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Abstract: | The nuclear basis of B-chromosome genetic activity in rye has been investigated using quantitative cytochemical techniques on isolated root tip nuclei. Nuclear DNA amount was found to be directly proportional to B-chromosome number. Relative amounts of total nuclear protein and nuclear RNA however, decreased with increasing numbers of B's but not in a strictly linear fashion. The values were disproportionately low for odd numbered B-classes of plants. Histone protein was found to increase as the number of B's went up, and in this case the values were disproportionately high for odd numbered B-classes. A negative correlation was found between histone and total nuclear protein and histone and nuclear RNA amounts. |
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