Journal
FUNGAL ECOLOGY
Volume 34, Issue -, Pages 76-82Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.funeco.2018.05.006
Keywords
Antarctica; Climate change; Colobanthus quitensis; Ecophysiological performance; Fungal endophytes
Funding
- Chilean Antarctic Institute (INACH)
- FONDECYT [11140607, PII 20150126]
- Spanish Ministry of Economy, Industry and Competitiveness (MINECO) [BFU2014-55575-R]
- 'Nucleo Cientifico Multidisciplinario' from Universidad de Talca
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Antarctic environments are amongst the most stressful habitats for life on Earth, with high intensities of solar UV-B radiation reaching the land surface. In this study, we evaluated how the photochemical efficiency, cell damage and reproductive biomass of Antarctic pearlwort (Colobanthus quitensis) were affected by different intensities of UV-B radiation in the absence and presence of fungal endophytes. In addition, we evaluated the hormonal content of plants at different UV-B radiation intensities and how hormonal content was affected by endophytes. Overall, plants exposed to UV-B radiation showed higher numbers of flowers, higher total biomass and lower lipid peroxidation in the presence of endophytes compared with plants without endophytes. Photochemical efficiency was unaffected. Fungal endophytes affected the content of salicylic acid, jasmonate, indole-3-acetate and abscisic acid in shoot tissue of plants exposed to UV-B radiation. These results suggest that endophytes could modulate the hormonal content of C quitensis to improve its ecophysiological performance under high UV-B radiation. (C) 2018 Elsevier Ltd and British Mycological Society. All rights reserved.
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