Effect of 7-azatryptophan on heterocyst differentiation inAnabaena doliolum Bharadwaja |
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Authors: | Manju Agrawal H D Kumar |
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Affiliation: | 1. Department of Botany, Banaras Hindu University, 221 005, Varanasi
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Abstract: | The effect of DL-7-azatryptophan, an analogue of tryptophan, has been studied on the heterocyst spacing pattern and the probability of proheterocyst regression inAnabaena doliolum. 7-azatryptophan suppressed growth and induced heterocyst differentiation in nitrogen-free medium. In ammonium (1 mM), nitrite (2 mM) and nitrate (2 mM) supplemented media, it caused proheterocyst regression with a frequency of 100%, 35% and 10% respectively. The role of azatryptophan in nitrogen metabolism has been discussed in relation to ammonia-uptake study. |
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