Journal of Pesticide Science
Online ISSN : 1349-0923
Print ISSN : 1348-589X
ISSN-L : 0385-1559
Original Articles
Induction of resistance to diseases in plant by aerial ultrasound irradiation
Daichi KawakamiTakanobu YoshidaYutaro KanemaruMedali Heidi Huarhua ZaquinaulaTomomichi MizukamiMichiko ArimotoTakahiro ShibataAkihiro GotoYoshinari EnamiHiroshi AmanoTohru TeraokaKen KomatsuTsutomu Arie
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Supplementary material

2019 Volume 44 Issue 1 Pages 41-47

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Abstract

Ultrasound, which refers to frequencies above the audible limit of human hearing, is a candidate for inducing resistance to pathogens in plants. We revealed that aerial ultrasound of 40.5 kHz could induce disease resistance in tomatoes and rice when the plants were irradiated with ultrasound of ca. 100 dB for 2 weeks during nursery season and reduced the incidence of Fusarium wilt and blast diseases, respectively, when plants were inoculated with pathogen 0 or 1 week after terminating irradiation. Disease control efficacy was also observed with ultrasound at frequencies of 19.8 and 28.9 kHz. However, cabbage yellows and powdery mildew on lettuce were not suppressed by ultrasound irradiation. No significant positive or negative effect on growth was observed in tomato and rice plants. RT-qPCR showed that the expression of PR1a involved in the salicylic acid (SA) signaling pathway was upregulated in the ultrasound-irradiated tomato.

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© 2019 Pesticide Science Society of Japan
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