Effect of 7-azatryptophan on heterocyst differentiation inAnabaena doliolum Bharadwaja

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Jan 1978 English Publisher:Springer Science and Business Media LLCJournal:Proceedings / Indian Academy of Sciences, volume 87, pages 31-39 (issn: 0370-0097,

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Authors: Manju Agrawal; H D Kumar;

doi: 10.1007/bf03178971

Effect of 7-azatryptophan on heterocyst differentiation inAnabaena doliolum Bharadwaja

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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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Banaras Hindu University
India

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