Plant growth and arbuscular mycorrhizal fungal colonization affected by exogenously applied phenolic compounds

• Published in: Journal of chemical ecology Vol. 23; no. 7; pp. 1755 - 1767
• Main Authors: Fries, L.L.M. (DTA-UFSM, Santa Maria, Brazil.), Pacovsky, R.S, Safir, G.R, Siqueira, J.O
• Format: Journal Article
• Language: English
• Published: New York, NY Springer 01.07.1997; Springer Nature B.V
• Subjects: ACIDE PHENOLIQUE; ACIDOS FENOLICOS; Agronomy. Soil science and plant productions; ALELOPATIA; ALLELOPATHIE; ALLELOPATHY; Biological and medical sciences; Colonization; Economic plant physiology; Farming systems; FLAVONOIDE; FLAVONOIDES; FLAVONOIDS; Fundamental and applied biological sciences. Psychology; Fungi; GLOMUS INTRARADICES; MYCORHIZE; MYCORRHIZAE; PHENOLIC ACIDS; Phenols; Plant growth; Soil amendment; Sorghum; SORGHUM BICOLOR; Symbiosis; Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...); TRIFOLIUM REPENS; Monocotyledones; Phenolic acid; Growth; Metabolite; Phycomycetes; Cereal crop; Fungi; Sorghum bicolor; Gramineae; Dicotyledones; Angiospermae; Benzoic acid(4-hydroxy); Biological effect; Trifolium repens; Thallophyta; Symbionte; Vegetal microorganism relation; Endomycorrhiza; Leguminosae; Mycorrhiza; Quercetin; Spermatophyta; Fodder crop; Cinnamic acid(hydroxy); Colonization
• ISSN: 0098-0331; 1573-1561
• DOI: 10.1023/B:JOEC.0000006449.09141.cd

The effects of the application of 0.25 or 1.0 mM p-coumaric acid, p-hydroxybenzoic acid, or quercetin on growth and colonization of clover (Trifolium repens L. cv. Ladino) and sorghum (Sorghum bicolor L.) roots by the arbuscular mycorrhizal (AM) fungus Glomus intraradices Schenck and Smith were studied. In general, soil application of these compounds at 0.25 mM stimulated plant growth and AM colonization, whereas at 1.0 mM these phenolics were inhibitory to both growth and colonization. Such effects were noted for both clover and sorghum. The results suggest that phenolic compounds, commonly found in many soils, influence the establishment of AM symbioses, and these compounds may have immediate effects on host growth. Studies involving these chemicals and their effects on mycorrhizal associations may provide new insights concerning the importance of the AM symbiosis in agricultural systems. These phenolic compounds may be used as potential soil amendments to enhance AM fungal colonization, and thus, exploit indigenous populations of AM fungi