Release patterns and potential utility of herbivore-induced plant volatiles in crops: A review

Environmental and Experimental Botany, Journal Year: 2024, Volume and Issue: 219, P. 105659 - 105659

Published: Jan. 17, 2024

Language: Английский

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Associational resistance in the milpa: herbivore‐induced maize volatiles enhance extrafloral nectar‐mediated defenses in common bean via shared parasitoids

New Phytologist, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Mixed cropping systems typically provide better natural pest control compared with monocultures, although the success varies depending on crop and cultivar combinations. Understanding trait interactions that confer associational resistance (AR) to companion plants is key optimizing these benefits. The Mesoamerican milpa system, known for its resistance, provides a model studying interactions. We tested two hypotheses investigate whether access extrafloral nectar (EFN) produced by Phaseolus vulgaris (common bean) can protect Zea mays (maize): (1) EFN enhances survival performance of parasitoid wasp, leading increased parasitism fall armyworm (FAW) caterpillars accompanying maize reduced herbivory, (2) bean detect herbivore-induced plant volatiles (HIPVs) respond increasing secretion. Controlled experiments demonstrated wasps from lived longer, had higher fecundity, parasitized more maize, thereby reducing herbivore damage. Additionally, caterpillar-damaged primed secretion in via HIPVs. Our findings reveal potentially important AR mechanism milpa, contributing reputed resistance. This understanding could inform design sustainable mixed enhance control.

Language: Английский

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Sesquiterpene Biosynthetic Gene vir4 from Trichoderma virens Enhances Direct Herbivore Resistance while Maintaining Indirect Defense

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Trichoderma species are widely used as root-colonizing biocontrol agents that enhance plant resistance to biotic and abiotic stresses while promoting growth. These fungi produce diverse volatile non-volatile metabolites mediate interactions with plants. can influence both direct indirect defenses, including the release of herbivore-induced volatiles (HIPVs) attract natural enemies herbivores. In this study, we examined effects T. virens its vir4 gene (regulating terpenioid synthesis) knockout-mutant on maize (Zea mays), herbivore Helicoverpa armigera, predator Macrolophus pygmaeus. Previous research has shown differentially modulate root expression specialized metabolite concentrations. Here, found caterpillars feeding seedlings colonized by wild-type gained significantly less weight than those knockout mutant or uncolonized plants, suggesting cluster contributes resistance. Although fungal colonization led moderate changes in HIPV composition, total emissions remained unchanged. Y-tube assays, M. pygmaeus preferred caterpillar-infested over healthy but did not affect behavior. Our findings demonstrate enhances defense against herbivores neutralising through a mechanism regulated terpenoid synthesis depending gene. Further is needed elucidate metabolic induced contribute reduced performance.

Language: Английский

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Multitrophic and Multilevel Interactions Mediated by Volatile Organic Compounds

Insects, Journal Year: 2024, Volume and Issue: 15(8), P. 572 - 572

Published: July 28, 2024

Plants communicate with insects and other organisms through the release of volatile organic compounds (VOCs). Using Boolean operators, we retrieved 1093 articles from Web Science Scopus databases, selecting 406 for detailed analysis, approximately 50% focusing on herbivore-induced plant volatiles (HIPVs). This review examines roles VOCs in direct indirect defense mechanisms their influence complex communication networks within ecosystems. Our research reveals significant functions four principal areas: activating insect antennae, attracting adult insects, female natural enemies. Terpenoids like α-pinene β-myrcene significantly alter pest behavior by β-ocimene β-caryophyllene are crucial regulating aboveground belowground interactions. We emphasize potential applications agriculture developing novel control strategies enhancing crop resilience. Additionally, identify gaps propose new directions, stressing importance comparative studies across ecosystems long-term observational to better understand dynamics. In conclusion, provide insights into multifunctionality ecosystems, future applications, role advancing sustainable agricultural ecological practices, contributing a deeper understanding functions.

Language: Английский

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The mesoamerican milpa system: Traditional practices, sustainability, biodiversity, and pest control

Biological Control, Journal Year: 2024, Volume and Issue: 198, P. 105637 - 105637

Published: Oct. 18, 2024

Language: Английский

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Simulation of early season herbivory via mechanical damage affects flower production in pumpkin (Cucurbita pepo ssp. pepo)

Annals of Botany, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 2, 2024

Abstract Background Damage from insect herbivores can elicit a wide range of plant responses, including reduced or compensatory growth, altered volatile profiles, increased production defence compounds. Specifically, herbivory alter floral development as plants reallocate resources towards and regrowth functions. For pollinator-dependent species, quantity quality are critical for attracting visitors; thus, herbivore-induced developmental effects that either abundance attractiveness may have implications reproductive success. Based on past work resource trade-offs, we hypothesize herbivore damage-induced stronger in structural traits require significant investment (e.g. flower quantity), regrowth, weaker secondary less nectar rewards). Methods In this study, simulated early-season mechanical damage the domesticated jack-o-lantern pumpkin Cucurbita pepo ssp. measured diverse suite over 60-d greenhouse experiment. Key Results We found delayed onset male anthesis total flowers produced. Additionally, permutational multivariate analysis variance (PERMANOVA) indicated significantly impacts overall profile, though not output sesquiterpenoids, class compounds known to recruit specialized cucumber beetle squash bee pollinators. Conclusions show C. spp. reduces following damage, volatiles do exhibit shifts production, indicative trait plasticity. Such reductions could reduce relative damaged foraging pollinators globally relevant cultivated species.

Language: Английский

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Herbivore-induced volatiles reduce the susceptibility of neighboring tomato plants to transmission of a whitefly-borne begomovirus

Journal of Experimental Botany, Journal Year: 2024, Volume and Issue: 75(20), P. 6663 - 6675

Published: Aug. 9, 2024

Plant viruses exist in a broader ecological community that includes non-vector herbivores can impact vector abundance, behavior, and virus transmission within shared host plants. However, little is known about the effects of herbivore infestation on by insects neighboring plants through inter-plant airborne chemicals. In this study, we investigated how volatiles emitted from tomato infested with two-spotted spider mite (Tetranychus urticae) affect infection yellow leaf curl (TYLCV) transmitted whitefly (Bemisia tabaci). Exposure to released T. urticae-infested reduced subsequent herbivory as well TYLCV infection, jasmonic acid signaling pathway was essential for generation defense signals. We also demonstrated (E)-β-ocimene methyl salicylic were two induced urticae synergistically attenuated tomato. Thus, our findings suggest plant-plant communication via likely represents widespread defensive mechanism substantially contributes plant fitness. Understanding such phenomena may help us predict occurrence epidemics multiple agroecosystems, ultimately manage pest outbreaks.

Language: Английский

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Eco‐evolutionary factors contribute to chemodiversity in aboveground and belowground cucurbit herbivore‐induced plant volatiles

Plant Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 20, 2024

When attacked by insect herbivores, plants emit blends of chemical compounds known as herbivore-induced plant volatiles (HIPVs). Although HIPVs are produced both aboveground and belowground, how vary across tissues remains unresolved, do the selective forces shaping interspecific HIPV emission patterns. Here, we compared foliar root within among closely related species evaluated if different eco-evolutionary forces, including domestication, coexistence histories with or phylogenetic relatedness, explain blends. To examine belowground patterns in HIPVs, leaf volatile profiles for six Cucurbitaceae that differed domestication status history specialist herbivores. We predicted within-species from would be more similar than species, chemodiversity was reduced enhanced found herbivory induced quantitative qualitative changes emissions all which were pronounced belowground. Each tissue-specific species. Contrary to our predictions, diversity, while herbivores diversity. Additionally, relatedness did not correlate volatiles. Overall, this work furthers understanding driving emissions, elucidating an important previously undescribed component within-plant variation chemodiversity.

Language: Английский

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Transitioning towards dynamic, nature-based crop defenses

Journal of Biosciences, Journal Year: 2024, Volume and Issue: 49(4)

Published: Dec. 3, 2024

Language: Английский

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