Production of Plant Growth-Regulating Substances by the Vesicular-Arbuscular Mycorrhizal Fungus Glomus mosseae

Author:

Barea José M.1,Azcón-Aguilar Concepción1

Affiliation:

1. Departamento de Microbiología, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Cientificas, Granada, Spain

Abstract

Glomus mosseae , a representative species of Endogonaceae (Phycomycetes) able to form vesicular-arbuscular mycorrhiza, was investigated for phytohormone production. Spores of G. mosseae were axenically germinated in water, and the resultant mycelial growth was assayed by standard procedures for extracting plant hormones from microbial cultures. Paper partition chromatography and specific bioassays were used to separate and identify plant growth-regulating substances. The microorganism synthesized at least two gibberellin-like substances, one with R f corresponding in position to authentic gibberellic acid, and four substances with the properties of cytokinins.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference17 articles.

1. Phytohormone changes in Bouteloua gracilis infected by vesicular-arbuscular mycorrhizae: I. Cytokinin increases in the host plant;Allen M. F.;Can. J. Bot.,1980

2. Effects of plant hormones present in bacterial cultures on the formation and responses to VA endomycorrhiza;Azc R.;New Phytol.,1978

3. Synthesis of auxins, gibberellins and cytokinins by Azotobacter vinelandii and Azotobacter beijerinckii related to effects produced on tomato plants;Azc R.;Plant Soil,1975

4. Effects of interactions between different culture fractions of "phosphobacteria;Azc G.;Can. J. Microbiol.,1978

5. An improved procedure for the study of axenic growth of the endomycorrhizal fungus Glomus mosseae;Azc G.;Microbios Lett.,1978

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