| Effect of tryptophan on 2,4-dichlorophenoxyacetic acid toxicity in the nitrogen-fixing-cyanobacterium Nostoc linckia. | |
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MedLine Citation:
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PMID: 3083089 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The combined effect of a hormone weed killer 2,4-dichlorophenoxyacetic acid (2,4-D) and an amino acid (tryptophan) has been studied on growth and heterocyst differentiation in the cyanobacterium Nostoc linckia. 2.4-D at 100 micrograms/ml stimulated growth and heterocyst frequency in combined nitrogen-free medium while its higher concentrations inhibited both. Tryptophan under similar conditions promoted much growth yield with 3-4 fold enhanced heterocyst frequency than the control. Such heterocysts were immature and showed germination under in situ condition. The concentrations of 2,4-D (100 micrograms/ml) and tryptophan (50 micrograms/ml), stimulatory to growth and heterocyst formation, caused additive effect while herbicide inhibition of nitrogen-fixing growth at higher doses was partially relieved by tryptophan but tryptophan-induced heterocyst frequency was completely suppressed under this condition. The possible role of interaction of these two chemicals on growth and heterocyst formation has been discussed. |
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Authors:
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A K Mishra; D N Tiwari |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of basic microbiology Volume: 26 ISSN: 0233-111X ISO Abbreviation: J. Basic Microbiol. Publication Date: 1986 |
Date Detail:
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Created Date: 1986-05-16 Completed Date: 1986-05-16 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8503885 Medline TA: J Basic Microbiol Country: GERMANY, EAST |
Other Details:
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Languages: eng Pagination: 49-53 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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2,4-Dichlorophenoxyacetic Acid
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metabolism,
pharmacology* Cyanobacteria / drug effects*, growth & development Diuron / pharmacology Drug Interactions Glucose / pharmacology Nitrogen Fixation / drug effects Tryptophan / pharmacology* |
| Chemical | |
Reg. No./Substance:
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330-54-1/Diuron; 50-99-7/Glucose; 73-22-3/Tryptophan; 94-75-7/2,4-Dichlorophenoxyacetic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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