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In vitro salt and thermal tolerance of fungal endophytes of Nicotiana spp. growing in arid regions of north-western Australia

Dastogeer, K.M.G., Li, H., Sivasithamparam, K. and Wylie, S.J.ORCID: 0000-0002-5639-7460 (2019) In vitro salt and thermal tolerance of fungal endophytes of Nicotiana spp. growing in arid regions of north-western Australia. Archives of Phytopathology and Plant Protection, In press .

Link to Published Version: https://doi.org/10.1080/03235408.2018.1503762
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Abstract

Endophytic fungal strains isolated from indigenous Nicotiana plants naturally growing in dry and hot regions of north-western Australia were characterised based on their tolerance to salinity and temperature. Sixty-eight fungal isolates were tested on eight levels (0.5 M, 1.0 M, 1.5 M, 2.0 M, 2.5 M, 3.0 M, 3.5 M and 4.0 M) of five different of salts solutions NaCl, KCl, MgCl2, CaCl2 and MgSO4 and at various temperatures (25–50 °C). The salt adaptation test indicated that the fungal strains namely Aspergillus niger (E-202), A. ochraceous-A (E-134), Aurantiporus sp. (E-135), Cladosporium halotolerance (E-128), Pleurostomophora richardsiae (E-13) and Trichoderma sp. (E-185.1) were tolerant to higher concentrations of various salts. The most growth-limiting salt turned out to be MgCl2 followed by the chaotrope CaCl2. Responses to temperature tolerance revealed that most fungi tested could grow at 30 °C. About 50% all the fungi did not show any growth when the temperature was raised above 30 °C. When the temperature was raised up to 50 °C all the fungi failed to grow but the fungus Rasamsonia piperina (E-172). Endophyte strains identified could be promising candidates for future research in investigating the fungus–plant interactions and their roles in plant adaptation to inhospitable environments.

Item Type: Journal Article
Murdoch Affiliation: School of Veterinary and Life Sciences
Publisher: Taylor and Francis Ltd.
Copyright: © 2019 Informa UK Limited, trading as Taylor & Francis Group
URI: http://researchrepository.murdoch.edu.au/id/eprint/43560
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