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Open AccessArticle

Antifungal Activity of Eclipta alba Metabolites against Sorghum Pathogens

1
Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysuru 570006, India
2
Department of Plant and Environmental Science, University of Copenhagen, HøjbakkegårdAllé 13, 2630 Taastrup, Denmark
*
Author to whom correspondence should be addressed.
Plants 2019, 8(3), 72; https://doi.org/10.3390/plants8030072
Received: 12 February 2019 / Revised: 14 March 2019 / Accepted: 19 March 2019 / Published: 22 March 2019
(This article belongs to the Special Issue Plant Phytochemicals on Crop Protection and Biotechnology)
Unscientific use of synthetic fungicides in plant disease management has environmental ramifications, such as disease resurgence and serious health problems due to their carcinogenicity. This has prompted the identification and development of eco-friendly greener alternatives. Eclipta alba extract was evaluated for its antifungal activity in in vitro and in vivo against sorghum fungal pathogens Fusarium thapsinum, Alternaria alternata, Epicoccum sorghinum, and Curvularia lunata. The column purified methanolic extract of E. alba exhibited good antifungal activity against the target pathogens. The MIC was observed at 80 mg/mL for all tested pathogenic fungi, whereas MFC was 80 mg/mL for E. sorghinum, 100 mg/mL for F. thapsinum, A. alternata, and C. lunata. In vitro germination percentage was significantly high in seeds treated with E. alba extract (98%) over untreated control (91%). Significant disease protection of 95% was observed in greenhouse and 66% disease protection was noticed in field experiments. The efficacy of E. alba extract in field conditions was improved with the use of E. alba extract formulation. The profile of phytochemicals in E. alba methanol fractions was obtained by ultra-performance liquid chromatography (UPLC) mass spectroscopy. The [M-H] at m/z 313.3, m/z 797.9, and m/z 269.0 revealed the presence of wedelolactone, eclalbasaponin II, and apigenin, respectively. The H-nuclear magnetic resonance spectroscopy (1H-NMR) chemical shift value supported the findings of the mass spectrometry. The results highlighted the possible use of E. alba methanolic extract as alternative to chemical fungicide in sorghum disease management. View Full-Text
Keywords: Eclipta alba; eclalbasaponin; sorghum pathogens; MIC; mass spectrometry Eclipta alba; eclalbasaponin; sorghum pathogens; MIC; mass spectrometry
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MDPI and ACS Style

Sollepura Boregowda, R.; Murali, N.; C. Udayashankar, A.; R. Niranjana, S.; S. Lund, O.; S. Prakash, H. Antifungal Activity of Eclipta alba Metabolites against Sorghum Pathogens. Plants 2019, 8, 72.

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