Effect of Indoleacetic Acid on Growth and Dinitrogen Fixation in Cyanobacteria |
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Authors: | Legan?s, Francisco S?nchez-Maeso, Eva Fern?ndez-Valiente, Eduardo |
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Affiliation: | Dpto. Biolog?a, Facultad de Ciencias, Universidad Aut?noma de Madrid 28049-Madrid, Spain |
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Abstract: | The effect of IAA on growth, dinitrogen fixation, and heterocystsfrequency of Anabaena PCC 7119 and Nodularia sp. have been investigated.Concentrations of IAA ranging from 1010 to 104M did not change the growth of Anabaena PCC 7119. Concentrationshigher than 104 M were inhibitory. Similar results werefound in Nodularia sp. although in this case the inhibitoryeffect appeared with 105M of IAA. Neither the nitrogenaseactivity nor the heterocysts frequency were enhanced by IAAtreatment. (Received June 17, 1986; Accepted January 22, 1987) |
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