Changes in Chemical Composition of Essential Oils from Leaves of Different Lantana camara L. (Verbenaceae) Varieties after Feeding by the Introduced Biological Control Agent, Falconia intermedia Distant (Hemiptera: Miridae)

Ngxande-Koza, S.W.; Heshula, L.U.P.; Hill, Martin

doi:10.4001/003.025.0462

“…Terpenoids stored in the secretory structures of aromatic plants act as direct defense against herbivores, particularly against generalist insects [ 13 , 28 ] and despite their constitutive nature, terpenoids can be modulated by herbivory [ 29 , 30 , 31 , 32 ]. In this work, we showed that feeding S. littoralis on O. vulgare leaves caused both the chemical and genetic modulation of the plant terpenoids.…”

Section: Discussionmentioning

confidence: 99%

Origanum vulgare Terpenoids Induce Oxidative Stress and Reduce the Feeding Activity of Spodoptera littoralis

Agliassa

¹

,

Maffei

²

2018

IJMS

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Terpenoids are toxic compounds produced by plants as a defense strategy against insect herbivores. We tested the effect of Origanum vulgare terpenoids on the generalist herbivore Spodoptera littoralis and the response of the plant to herbivory. Terpenoids were analyzed by GC-FID and GC-MS and quantitative gene expression (qPCR) was evaluated on selected plant genes involved in both terpene biosynthesis. The insect detoxification response to terpenes was evaluated by monitoring antioxidant enzymes activity and expression of insect genes involved in terpene detoxification. O. vulgare terpenoid biosynthesis and gene expression was modulated by S. littoralis feeding. The herbivore-induced increased level of terpenoids (particularly carvacrol and p-cymene) interacted with the herbivore by decreasing larval survival and growth rate. The assimilation by S. littoralis of more than 50% of ingested terpenes correlated with the possible toxic effects of O. vulgare terpenoids. In choice test experiments, carvacrol and γ-terpinene mediated the larval feeding preferences, wherease the prolonged feeding on O. vulgare terpenoids (particularly on γ-terpinene) exerted relevant antinutritional effects on larvae. S. littoralis was found to react to O. vulgare terpenoids by increasing its antioxidant enzymes activities and gene expression, although this was not sufficient to sustain the toxicity of O. vulgare terpenoids.

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“…Terpenoids stored in the secretory structures of aromatic plants act as direct defense against herbivores, particularly against generalist insects [13,28] and despite their constitutive nature, terpenoids can be modulated by herbivory [29][30][31][32]. In this work, we showed that feeding S. littoralis on O. vulgare leaves caused both the chemical and genetic modulation of the plant terpenoids.…”

Section: Discussionmentioning

confidence: 86%

Origanum Vulgare Terpenoids Induce Oxidative Stress and Reduce the Feeding Activity of Spodoptera Littoralis

Agliassa¹,

Maffei²

2018

Preprint

3

0

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Terpenoids are toxic compounds produced by plants as a defense strategy against insect herbivores. We tested the effect of Origanum vulgare terpenoids on the generalist herbivore Spodoptera littoralis and the response of the plant to herbivory. Terpenoids were analyzed by GC-FID and GC-MS and quantitative gene expression (qPCR) was evaluated on selected plant genes involved in both terpene biosynthesis. The insect detoxification response to terpenes was evaluated by monitoring antioxidant enzymes activity and expression of insect genes involved in terpene detoxification. O. vulgare terpenoid biosynthesis and gene expression was modulated by S. littoralis feeding. The herbivore-induced increased level of terpenoids (particularly carvacrol and p-cymene) interacted with the herbivore by decreasing larval survival and growth rate. The assimilation by S. littoralis of more than 50% of ingested terpenes correlated with the possible toxic effects of O. vulgare terpenoids. In choice test experiments, carvacrol and γ-terpinene mediated the larval feeding preferences, wherease the prolonged feeding on O. vulgare terpenoids (particularly on γ-terpinene) exerted relevant antinutritional effects on larvae. S. littoralis was found to react to O. vulgare terpenoids by increasing its antioxidant enzymes activities and gene expression, although this was not sufficient to sustain the toxicity of O. vulgare terpenoids. Author Contributions: Conceptualization, M.E.M..; Methodology, M.E.M. and C.A.; Software, M.E.M. and C.A.; Validation, M.E.M. and C.A.; Formal Analysis, C.A.; Investigation, M.E.M. and C.A.; Resources, M.E.M.; Data Curation, M.E.M. and C.A.; Writing-Original Draft Preparation, M.E.M.; Writing-Review & Editing, M.E.M. and C.A.; Visualization, M.E.M. and C.A.; Supervision, M.E.M.; Project Administration, M.E.M.; Funding Acquisition, M.E.M.

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Falconia poetica Distant1: First Host Record, New Distribution in Mexico, and Determination of Nymphal Instars

Aragón-Sánchez

¹

,

Figueroa

²

,

Martínez

³

et al. 2021

Southwestern Entomologist

0

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Changes in Chemical Composition of Essential Oils from Leaves of Different Lantana camara L. (Verbenaceae) Varieties after Feeding by the Introduced Biological Control Agent, Falconia intermedia Distant (Hemiptera: Miridae)

Cited by 3 publications

References 29 publications

Origanum vulgare Terpenoids Induce Oxidative Stress and Reduce the Feeding Activity of Spodoptera littoralis

Origanum vulgare Terpenoids Induce Oxidative Stress and Reduce the Feeding Activity of Spodoptera littoralis

<em>Origanum Vulgare</em> Terpenoids Induce Oxidative Stress and Reduce the Feeding Activity of <em>Spodoptera Littoralis</em>

Falconia poetica Distant1: First Host Record, New Distribution in Mexico, and Determination of Nymphal Instars

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