Vegetable waste extracts as enhancers of baculovirus infections

IF 3.5 2区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY
Blanca Martínez-Inda , Oihane Simón , Nerea Jiménez-Moreno , Irene Esparza , José Antonio Moler , Primitivo Caballero , Carmen Ancín-Azpilicueta
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引用次数: 0

Abstract

Vegetable waste extracts (VWE) contain a great variety of antioxidants such as polyphenols, which have shown to potentiate baculovirus infections, making them ingredients for pest control ingredients. In the present study, the mortality enhancement of different vegetable extracts obtained from food residues when combined with baculoviruses was evaluated. Extracts from spent coffee (E2), rosehip (E17), asparagus (E28), artichoke (E29), beet stalks (E32) and banana peel (E37) were selected as they increased mortality of Spodoptera littoralis nucleopolyhedrovirus (SpliNPV) in second instar S. littoralis larvae, when comparing with the virus inoculation alone. Extracts were assayed at 1 % w/v. In S. littoralis-SpliNPV system, the selected extracts reduced the median lethal concentration (LC50) of SpliNPV against second instar larvae. The E37 extract presented the highest potentiation, as it reduced the LC50 13.61 times, while the rest of the extracts presented LC50 reductions from 3.71 to 7.72-fold. In Spodoptera exigua-SeMNPV (Spodoptera exigua multiple nucleopolyhedrovirus) system, none of the extracts decreased the LC50 of SeMNPV. In contrast, in Spodoptera frugiperda-SfMNPV (Spodoptera frugiperda multiple nucleopolyhedrovirus) system, E2 showed the greatest potentiating effect. In the heterologous systems, none of the extracts tested increased the effective host range of SfMNPV, AcMNPV (Autographa californica multiple nucleopolyhedrovirus), and MbMNPV (Mamestra brassicae multiple nucleopolyhedrovirus) in second instar S. littoralis larvae. Thus, the viral enhancing effect of VWE was host-pathogen and instar dependent. However, the potentiation effect of the extracts could not be directly related with the antioxidants content of the extracts.

植物废物提取物作为杆状病毒感染增强剂
植物废物提取物(VWE)含有多种抗氧化剂,如多酚,已被证明可以增强杆状病毒感染,使其成为害虫防治成分的成分。在本研究中,研究了从食物残渣中提取的不同植物提取物与杆状病毒联合使用时对死亡率的提高。选择咖啡渣(E2)、玫瑰果(E17)、芦笋(E28)、洋蓟(E29)、甜菜茎(E32)和香蕉皮(E37)提取物,与单独接种病毒相比,可提高littorisaralis 2龄幼虫的SpliNPV致死率。提取液在1% w/v下测定。在littoralis-SpliNPV体系中,所选提取物可降低SpliNPV对2龄幼虫的中位致死浓度(LC50)。E37提取物的LC50降低幅度最大,为13.61倍,其余提取物的LC50降低幅度为3.71 ~ 7.72倍。在斑点夜蛾-多核多角体病毒(Spodoptera exiguua multiple - nuclear - polyhedrovirus, SeMNPV)体系中,各提取物均未降低SeMNPV的LC50。E2在多核多角体病毒(Spodoptera frugiperda multiple nuclear polyhedrovirus, sfmnpv)体系中增强作用最大。在异源体系中,没有一种提取物能增加SfMNPV、AcMNPV(加州自拟体多核多角体病毒)和MbMNPV(芸苔科多核多角体病毒)在2龄滨夜蛾幼虫体内的有效宿主范围。因此,VWE对病毒的增强作用是宿主-病原体和龄期依赖的。然而,提取物的增强作用与提取物的抗氧化剂含量没有直接关系。
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来源期刊
Annals of Agricultural Science
Annals of Agricultural Science AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
12.60
自引率
0.00%
发文量
18
审稿时长
33 days
期刊介绍: Annals of Agricultural Sciences (AOAS) is the official journal of Faculty of Agriculture, Ain Shams University. AOAS is an open access peer-reviewed journal publishing original research articles and review articles on experimental and modelling research at laboratory, field, farm, landscape, and industrial levels. AOAS aims to maximize the quality of the agricultural sector across the globe with emphasis on the Arabian countries by focusing on publishing the high-quality applicable researches, in addition to the new methods and frontiers leading to maximizing the quality and quantity of both plant and animal yield and final products.
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