Inhibition of Satellite RNA Associated Cucumber Mosaic Virus Infection by Essential Oil of Micromeria croatica (Pers.) Schott

Abstract

The present results dealing with the antiphytoviral activity of essential oil indicate that these plant metabolites can trigger a response to viral infection. The essential oil from Micromeria croatica and the main oil components β-caryophyllene and caryophyllene oxide were tested for antiphytoviral activity on plants infected with satellite RNA associated cucumber mosaic virus. Simultaneous inoculation of virus with essential oil or with the dominant components of oil, and the treatment of plants prior to virus inoculation, resulted in a reduction of virus infection in the local and systemic host plants. Treatment with essential oil changed the level of alternative oxidase gene expression in infected Arabidopsis plants indicating a connection between the essential oil treatment, aox gene expression and the development of viral infection.

Chemical Composition and New Biological Activities of Essential Oil and Hydrosol of Hypericum perforatum L. ssp. veronense (Schrank) H. Lindb

“…By the fifth day after inoculation, local lesions also developed on the inoculated leaves of the essential oil treated plants, but the percentage of inhibition compared to the control was still high (61.10%); on the seventh day post inoculation, the percentage of inhibition of local lesions on the leaves of the plants treated with essential oil was 50.33% (Figure 2). Comparing previous results dealing with the antiphytoviral activity of essential oils of different plant species [23][24][25][26][27][28][29] with the current results (Figure 2), we can conclude that pretreatment of local host plants with the essential oil of H. perforatum ssp. veronense shows a promising activity level, especially in the early stage of infection.…”

“…In addition, there is a wealth of information on the role of essential oils in plant-plant, plant-animal, or plant-insect interactions [70]. We have previously reported that essential oils from different plant species can trigger a response to viral infections in plants [23][24][25][26][27][28][29], but the same has never been shown for hydrosols. We hypothesise that hydrosols, as water solutions of bioactive components during the distillation process of essential oil, are a readily available and safe natural source of bioactive components that can serve as a mixture of active ingredients that can protect plants against viral infections.…”

“…Natural antiphytoviral preparations are a new area of research in the field of plant protection against viruses. We hypothesized that the essential oil of Hypericum species may have antiphytoviral activity, which is related to findings that essential oils of aromatic plant species, especially sesquiterpene-rich oils, inhibit viral infection on host plants [23][24][25][26][27][28][29]. Moreover, high solar radiation in the eumediterranean climate and the drought are the stressful conditions that H. perforatum ssp.…”

First Report on Yield and Chemical Composition of Essential Oil Extracted from Myrcia eximia DC (Myrtaceae) from the Brazilian Amazon

“…Its biological activities are widely reported in the literature, such as those against bacteria, [36], fungi [37], and viruses [38]. There are also reports of its anti-inflammatory [39], anticancer [40], analgesic [41], and antiphytoviral [42] activities. The analogs caryophyllene oxide and 14-hydroxy-9-epi-(E)-caryophyllene were also identified in the three extractions performed.…”

Biological Activity of Essential Oils

“…EOs have shown remarkable healing effects in wounds both in vivo and in vitro models [14] and a contributor to the potential of wound healing by Eugenia dysenterica EO has also been reported [15]. Although EOs have antiviral actions against animal/human viruses [16,17], Vuko et al [18] reported a further study on the anti-phytoviral activity of Micromeria croatica EO in inhibiting satellite RNA Associated Cucumber Mosaic Virus Infection.…”