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Molecules 2016, 21(5), 621; doi:10.3390/molecules21050621

Antifungal Activity of Eucalyptus Oil against Rice Blast Fungi and the Possible Mechanism of Gene Expression Pattern

1
Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu 610064, China
2
College of Life Sciences and College of Resources, Sichuan Agricultural University, Ya’an 625000, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 29 March 2016 / Revised: 5 May 2016 / Accepted: 6 May 2016 / Published: 12 May 2016
(This article belongs to the Section Natural Products)
View Full-Text   |   Download PDF [1476 KB, uploaded 12 May 2016]   |  

Abstract

Eucalyptus oil possesses a wide spectrum of biological activity, including anti-microbial, fungicidal, herbicidal, acaricidal and nematicidal properties. We studied anti-fungal activities of the leaf oil extracted from Eucalyptus. grandis × E. urophylla. Eleven plant pathogenic fungi were tested based on the mycelium growth rates with negative control. The results showed that Eucalyptus oil has broad-spectrum inhibitory effects toward these fungi. Remarkable morphological and structural alterations of hypha have been observed for Magnaporthe grisea after the treatment. The mRNA genome array of M. grisea was used to detect genes that were differentially expressed in the test strains treated by the Eucalyptus oil than the normal strains. The results showed 1919 genes were significantly affected, among which 1109 were down-regulated and 810 were up-regulated (p < 0.05, absolute fold change >2). According to gene ontology annotation analysis, these differentially expressed genes may cause abnormal structures and physiological function disorders, which may reduce the fungus growth. These results show the oil has potential for use in the biological control of plant disease as a green biopesticide. View Full-Text
Keywords: E. grandis × E. urophylla oil; antifungal effects; M. grisea; mRNA Genome Array; biological control E. grandis × E. urophylla oil; antifungal effects; M. grisea; mRNA Genome Array; biological control
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Zhou, L.-J.; Li, F.-R.; Huang, L.-J.; Yang, Z.-R.; Yuan, S.; Bai, L.-H. Antifungal Activity of Eucalyptus Oil against Rice Blast Fungi and the Possible Mechanism of Gene Expression Pattern. Molecules 2016, 21, 621.

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