Stress tolerance of soil fungal communities from native Atlantic forests, reforestations, and a sand mining degraded area

Author(s)

Ferreira, Paulo C. ; Pupin, Breno ; Rangel, Drauzio E. N.

• Document type: Journal article
• Source: FUNGAL BIOLOGY; v. 122, n. 6, p. 10-pg., 2018-06-01.

Abstract

Microorganisms are essential to the functionality of the soil, particularly in organic matter decomposition and nutrient cycling, which regulate plant productivity and shape the soil structure. However, biotic and abiotic stresses greatly disrupt soil fungal communities and, thereby, disturb the ecosystem. This study quantified seasonal tolerances to UV-B radiation and heat of fungal communities, which could be cultured, found in soil from two native Atlantic forest fragments called Fl and F2, five reforested areas (RA) planted in 1994, 1997, 2004, 2007, and 2009 with native species of the Atlantic forest, and one sand mining degraded soil (SMDS). The cold activity of the soil fungal communities (FC) from the eight different areas was also studied. Higher tolerance to UV-B radiation and heat was found in the FC from the SMDS and the 2009RA, where the incidence of heat and UV radiation from sun was more intense, which caused selection for fungal taxa that were more UV-B and heat tolerant in those areas. Conversely, the FC from the native forests and older reforested sites were very susceptible to heat and UV-B radiation. The cold activity of the soil FC from different areas of the study showed an erratic pattern of responses among the sampling sites. Little difference in tolerance to UV-B radiation and heat was found among the FC of soil samples collected in different seasons; in general soil FC collected in winter were less tolerant to UV-B radiation, but not for heat. In conclusion, FC from SMDS soil that receive intense heat and UV radiation, as well as with low nutrient availability, were more tolerant to both UV-B radiation and heat. (C) 2017 British Mycological Society. Published by Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 10/06374-1 - Visible light during growth enhances conidial tolerance to different stress conditions in fungi
• Grantee: Drauzio Eduardo Naretto Rangel
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 10/09606-0 - First Brazilian Symposium about the Effects of Increased UV Radiation on Agriculture
• Grantee: Drauzio Eduardo Naretto Rangel
• Support Opportunities: Organization Grants - Scientific Meeting
• FAPESP's process: 13/50518-6 - Stress related genes are induced by visible light during mycelial growth resulting in increased conidial tolerance to stress conditions
• Grantee: Drauzio Eduardo Naretto Rangel
• Support Opportunities: Regular Research Grants