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Effect of growth-promoting chemicals on growth, nitrogen fixation and heterocyst frequency of a blue-green alga

✍ Scribed by Dr. K. Kapoor; V. K. Sharma

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 302 KB
Volume: 21
Category: Article
ISSN: 0233-111X
DOI: 10.1002/jobm.19810210406

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✦ Synopsis

Abstract

IAAAbbreviations used: IAA, indole‐3‐acetic acid; NAA, α‐naphthalene acetic acid; GA, Gibberellic acid; IPA, 3‐indole propionic acid; IBA, 3‐indole butyric acid; PAA, phenyl acetic acid

was found to stimulate growth, nitrogen fixation and pigment synthesis in Anabaena doliolum in all concentrations tested. Heterocyst frequency was stimulated up to a concentration of 50 ppm IAA. NAA stimulated growth and nitrogen fixation up to 10 ppm. GA promoted growth, pigment synthesis, heterocyst frequency and nitrogen fixation only up to a concentration of 2 ppm. Kinetin promoted growth up to 100 ppm and synthesis of pigments, while nitrogen fixation was stimulated up to 5 ppm.

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