Seed exudates of Sesbania virgata (Cav.) Pers. stimulate the asymbiotic phase of the arbuscular mycorrhizal fungus Gigaspora albida Becker & Hall

Author(s)

Leilyane C.S. Coelho ; Daiane S.B. Mignoni ^[2] ; Fábio S.B. Silva ; Márcia R. Braga

• Document type: Journal article
• Source: Hoehnea; v. 46, n. 1 2019-04-04.

Abstract

ABSTRACT Sesbania virgata is a legume used in the restoration of degraded areas and forms a symbiosis with arbuscular mycorrhizal fungi (AMF). Its seeds exude secondary metabolites that may influence the colonization by AMF. In this work, we studied the effects of seed (SE) and root exudates (RE) of S. virgata on the asymbiotic phase of Gigaspora albida. Spores of G. albida were germinated in medium supplemented with different concentrations of SE or RE. After seven days, spore germination was stimulated (46.6%) in the medium supplemented with the highest concentration of SE, while the mycelial growth was stimulated with the lowest SE concentration. In turn, RE had no effect on the fungal asymbiotic phase. We concluded that SE exert a positive effect on the asymbiotic phase of G. albida and that the different effects between SE and RE of S. virgata can be explained by their distinct content of secondary metabolites. (AU)

• FAPESP's process: 05/04139-7 - Carbohydrates of tropical species as modulators of ecophysiological processes and as environmental stress response markers
• Grantee: Marcia Regina Braga
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 12/16332-0 - Storage and cell wall carbohydrates from plants and filamentous fungi: changes in response to alelochemicals and environmental conditions
• Grantee: Marcia Regina Braga
• Support Opportunities: Regular Research Grants