Mechanisms behind polyphagia in a pest insect: Responses of Spodoptera frugiperda (J.E. Smith) strains to preferential and alternative larval host plants assessed with gene regulatory networks

Murad, Natália Faraj; Silva-Brandão, Karina Lucas; Brandão, Marcelo Mendes

doi:10.1016/j.bbagrm.2021.194687

Cited by 5 publications

(4 citation statements)

References 85 publications

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“…Higher gene family evolution rates could be due to underlying gene duplication, neofunctionalization and/or genome rearrangements, all of which are implicated in polyphagous feeding (Murad et al, 2021;Seppey et al, 2019).…”

Section: Gene Evolution In Lepidopteramentioning

confidence: 99%

Gene family evolution in brassicaceous-feeding insects: Implications for adaptation and host plant range

Ravikanthachari

Boggs

2023

Preprint

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Herbivores have a defined range of hostplants that they can feed on, which is mediated by underlying detoxification and sensory repertoires. Insects that feed on Brassicaceae represent one of the striking examples of co-evolutionary arms race. Insects specialized on Brassicaceae have evolved specific mechanisms to detoxify mustard oils (glucosinolates), while generalist species use detoxification enzymes that act on a variety of substrates. Understanding the gene evolution of detoxification and sensory repertoire in specialist and generalist Brassicaceae feeders will shed light on the processes involved in mediating hostplant ranges in herbivores. We use a comparative phylogenomic approach in 12 lepidopterans that feed on Brassicaceae, ranging from specialist to pests in their host range to examine the gene family expansion of detoxification and sensory gene families. We found that gene family expansions and contractions were larger in generalist herbivores compared to specialist herbivores. Gene evolutionary rate of detoxification genes reflected hostplant range where generalists had a higher evolutionary rate of detoxification genes that act on wide substrates while specialists had a higher evolutionary rate in genes that conjugate toxic compounds to hydrophilic byproducts. Our analysis on the nitrile specifier gene, a key innovation for feeding on Brassicaceae, indicated pervasive purifying selection with lineage specific differences in selection. Our results add to the growing body of work addressing gene family evolution and its role in hostplant range and specialization in insects.

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Section: Gene Evolution In Lepidopteramentioning

confidence: 99%

Gene family evolution in brassicaceous-feeding insects: Implications for adaptation and host plant range

Ravikanthachari

Boggs

2023

Preprint

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“…To date, research on the response of host plants to S. frugiperda were focused on plant volatile compound identification, genetic resistance, host plant preference, etc. (Costa et al, 2020;De Lange et al, 2020;Garlet et al, 2021;Hafeez et al, 2021;Haq et al, 2021;Jacques et al, 2021;Lv et al, 2021;Murad et al, 2021;Yactayo-Chang et al, 2021;Peterson et al, 2022). However, the performance and the mechanism of maize plants in response to S. frugiperda still need to be studied further.…”

Section: Introductionmentioning

confidence: 99%

Different responses of two maize cultivars to Spodoptera frugiperda (Lepidoptera: Noctuidae) larvae infestation provide insights into their differences in resistance

Yang

Ma²,

Jia³

et al. 2023

Front. Plant Sci.

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Spodoptera frugiperda (Lepidoptera: Noctuidae), a pest with an amazing appetite, damages many crops and causes great losses, especially maize. Understanding the differences in different maize cultivars’ responses to S. frugiperda infestation is very important for revealing the mechanisms involved in the resistance of maize plants to S. frugiperda. In this study, a comparative analysis of two maize cultivars, the common cultivar ‘ZD958’ and the sweet cultivar ‘JG218’, was used to investigate their physico-biochemical responses to S. frugiperda infestation by a pot experiment. The results showed that the enzymatic and non-enzymatic defense responses of maize seedlings were rapidly induced by S. frugiperda. Frist, the hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents of infested maize leaves were significantly increased and then decreased to the level of the control. Furthermore, compared with the control leaves, the puncture force values and the total phenolics, total flavonoids, and 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one contents of infested leaves were significantly increased within a certain time. The superoxide dismutase and peroxidase activities of infested leaves were significantly increased in a certain period of time, while the catalase activities decreased significantly and then increased to the control level. The jasmonic acid (JA) levels of infested leaves were significantly improved, whereas the salicylic acid and abscisic acid levels changed less. Signaling genes associated with phytohormones and defensive substances including PAL4, CHS6, BX12, LOX1, and NCED9 were significantly induced at certain time points, especially LOX1. Most of these parameters changed greater in JG218 than in ZD958. Moreover, the larvae bioassay showed that S. frugiperda larvae weighed more on JG218 leaves than those on ZD958 leaves. These results suggested that JG218 was more susceptible to S. frugiperda than ZD958. Our findings will make it easier to develop strategies for controlling S. frugiperda for sustainable maize production and breeding of new maize cultivars with increased resistance to herbivores.

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“…The ability of A . obliqua to be polyphagous may be due to different factors, such as changes in the expression of its genes (Murad et al, 2021). The differences in the abundances of gene expression allow an individual to show a different phenotype without the need to have a genetic change, which is known as phenotypic plasticity (Chen et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

First micro‐transcriptome of the third instar larvae of Anastrepha obliqua and its association with polyphagia

Lemos‐Lucumi

Velasco‐Cuervo

Toro‐Perea

2022

J Applied Entomology

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Phytophagous insects are organisms that use a part of a plant as a food resource.Within this group, we focused on the pest insect Anastrepha obliqua, a fly that feeds on fruits of plants of different species and causes economic losses on the American continent. The ability of the larvae of this species to feed on various fruits (polyphagia) has been studied from different perspectives but never at the level of microRNAs.These interfering RNAs can regulate gene expression in tissues and organs of an organism. The objective of this work was to obtain the first micro-transcriptome and to determine its expression levels and possible target mRNAs when the third instar larvae of the species A. obliqua feed on fruits of plants of three different species:Spondias purpurea, Mangifera indica and Averrhoa star fruit. A total of 116 microRNAs were identified in the study, of which 37 were completely new. Fifty-four microRNAs were expressed in all larvae, regardless of the fruit, while 44 were detected in larvae that fed on a specific fruit. Twenty-one microRNAs showed differential expression, and the annotation of the targets showed that these interfering RNAs have important genes that play roles in the development, feeding and detoxification of the larvae as possible targets. The construction of the first micro-transcriptome and the identification of possible targets for A. obliqua provide new information for understanding the mechanisms that control gene expression in this species of dipteran.

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Mechanisms behind polyphagia in a pest insect: Responses of Spodoptera frugiperda (J.E. Smith) strains to preferential and alternative larval host plants assessed with gene regulatory networks

Cited by 5 publications

References 85 publications

Gene family evolution in brassicaceous-feeding insects: Implications for adaptation and host plant range

Gene family evolution in brassicaceous-feeding insects: Implications for adaptation and host plant range

Different responses of two maize cultivars to Spodoptera frugiperda (Lepidoptera: Noctuidae) larvae infestation provide insights into their differences in resistance

First micro‐transcriptome of the third instar larvae of Anastrepha obliqua and its association with polyphagia

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