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| Author(s): | Brown, A. D. H.;
Marshall, D. R.;
Munday, J. |
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| Author Affiliation: | Div. Pl. Industr., CSIRO, Canberra, Australia |
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| Title: | Adaptedness of variants at an alcohol dehydrogenase locus in Bromus mollis L. (Soft bromegrass) |
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| Source: | Australian Journal of Biological Sciences. Vol. 29, No. 4, 1976, p. 389-396. |
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| Keywords: | TIC Keywords: Bromus; Chemicals; Alcohol; Dehydrogenases; Genetics; Germination; Temperatures
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| Abstract/Contents: | Evidence is reported which suggests that the naturally occurring, electrophoretically detectable allozyme variants of the Adh1B locus can respond differentially to environmental stresses. It appears that alcohol dehydrogenase activity is specifically involved in response to these stresses. Crude extracts of predominantly selfed seeds sampled from plants of known Adh1B genotype were assayed for their alcohol dehydrogenase activity in the forward and backward reactions. The seeds from Adhs1BAdhs1B plants produced extracts about 12% less active in both directions than seeds from their AdhF1BAdhF1B counterparts. Such Adhs1BAdhs1B plants were also shown to produce about 13% more dry matter when grown under continuous flooding in the greenhouse whereas no difference between genotypes was detected in control pots. The seeds of AdhF1BAdhF1B plants showed an advantage over the alternative homozygotes in more rapid germination at 2 deg C, but no difference was found at 15 deg C. Thus the variants are differentially adapted, and this is likely to play a role in the maintenance of the polymorphism in natural polulations. |
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| Language: | English |
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| References: | 22 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brown, A. D. H., D. R. Marshall, and J. Munday. 1976. Adaptedness of variants at an alcohol dehydrogenase locus in Bromus mollis L. (Soft bromegrass). Aust. J. Biol. Sci. 29(4):p. 389-396. |
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