Possible source of the high UV-B and heat tolerance of Metarhizium acridum (isolate ARSEF 324)

Author(s)

Rangel, Drauzio E. N. ^{[1, 2]} ; Roberts, Donald W. ^[1]

Affiliation

^[1] Utah State Univ, Dept Biol, Logan, UT 84322 - USA

^[2] Univ Brasil, BR-08230030 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Journal of Invertebrate Pathology; v. 157, p. 32-35, SEP 2018.
• Web of Science Citations: 2

Abstract

The isolate ARSEF 324 of Metarhiziwn acridum is very tolerant to UV-B radiation and heat, but the intrinsic traits behind the extreme tolerance of this isolate to both stress conditions have not been elucidated. Because trehalose and mannitol are documented stress reducers in fungi, we investigated the accumulation of these compounds in conidia of ARSEF 324 compared with the accumulation of these two compounds in conidia of M. robertsii (ARSEF 23 and ARSEF 2575), which are considerably more susceptible to UV-B radiation and heat than ARSEF 324. Conidia of ARSEF 324 produced on potato dextrose agaf plus yeast extract accumulated two-fold more trehalose and mannitol than conidia of ARSEF 23 and ARSEF 2575 produced on the same medium. The high accumulation of trehalose and mannitol in conidia of ARSEF 324 suggests one mechanism that it uses to attain its high tolerance to UV-B radiation and heat. (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 type: Research Grants - Young Investigators Grants
• 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 type: Regular Research Grants