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Consequences of Artificial and Natural Chromosome Doubling on DNA, RNA and Protein Contents in Cochlearia (Brassicaceae)

P. P. Gupta
Plant Systematics and Evolution
Vol. 138, No. 1/2 (1981), pp. 23-27
Published by: Springer
Stable URL: http://www.jstor.org/stable/23642594
Page Count: 5
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Consequences of Artificial and Natural Chromosome Doubling on DNA, RNA and Protein Contents in Cochlearia (Brassicaceae)
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Abstract

The effects of chromosome doubling on macromolecular composition, i.e. DNA, RNA and protein, were examined in diploid Cochlearia pyrenaica DC., its established natural autotetraploid C. officinalis L., and their newly colchicine-induced autotetraploid and autooctoploid derivatives. DNA, RNA and protein contents increase from lower to higher ploidy levels (2x > 4x > 8x). The established natural autotetraploids and newly induced autotetraploids also differ, as DNA, RNA and protein have been reduced during the course of establishment. Net synthesis of RNA and protein per unit DNA does not change significantly neither from lower to higher ploidy levels nor between the autotetraploids of newly induced and established natural origins.

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