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Different Antifungal Activity of Anabaena sp., Ecklonia sp., and Jania sp. against Botrytis cinerea

1
Department of Agriculture and Food Sciences, Alma Mater Studiorum, University of Bologna, 40127 Bologna, Italy
2
Banco Español de Algas, Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, 35214 Telde, Las Palmas, Canary Islands, Spain
*
Author to whom correspondence should be addressed.
Mar. Drugs 2019, 17(5), 299; https://doi.org/10.3390/md17050299
Received: 2 May 2019 / Revised: 13 May 2019 / Accepted: 16 May 2019 / Published: 20 May 2019
(This article belongs to the Collection Marine Polysaccharides)
Water extracts and polysaccharides from Anabaena sp., Ecklonia sp., and Jania sp. were tested for their activity against the fungal plant pathogen Botrytis cinerea. Water extracts at 2.5, 5.0, and 10.0 mg/mL inhibited B. cinerea growth in vitro. Antifungal activity of polysaccharides obtained by N-cetylpyridinium bromide precipitation in water extracts was evaluated in vitro and in vitro at 0.5, 2.0, and 3.5 mg/mL. These concentrations were tested against fungal colony growth, spore germination, colony forming units (CFUs), CFU growth, and on strawberry fruits against B. cinerea infection with pre- and post-harvest application. In in vitro experiments, polysaccharides from Anabaena sp. and from Ecklonia sp. inhibited B. cinerea colony growth, CFUs, and CFU growth, while those extracted from Jania sp. reduced only the pathogen spore germination. In in vitro experiments, all concentrations of polysaccharides from Anabaena sp., Ecklonia sp., and Jania sp. reduced both the strawberry fruits infected area and the pathogen sporulation in the pre-harvest treatment, suggesting that they might be good candidates as preventive products in crop protection. View Full-Text
Keywords: antifungal activity; polysaccharides; algae; cyanobacteria; Botrytis cinerea; strawberry antifungal activity; polysaccharides; algae; cyanobacteria; Botrytis cinerea; strawberry
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Righini, H.; Baraldi, E.; García Fernández, Y.; Martel Quintana, A.; Roberti, R. Different Antifungal Activity of Anabaena sp., Ecklonia sp., and Jania sp. against Botrytis cinerea. Mar. Drugs 2019, 17, 299.

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    Doi: 10.5281/zenodo.2658660
    Description: Figure S1. Effect of different concentrations of polysaccharides from Anabaena sp. on Botrytis cinerea colony growth 3 days after treatment (a) and spore germination (b). Untreated spore (c). Figure S2. Effect of preharvest treatment with polysaccharides (POL) from Jania sp. (JAN) on grey mould control of strawberry fruits six days after treatment. Untreated fruits (a); fruits treated with JAN-POL at 2.0 mg/mL (b) and fruits treated with JAN-POL at 3.5 mg/mL (c).
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