Behavioral and electrophysiological responses of Hylastinus obscurus to volatiles released from the roots of Trifolium pratense L.

Palma, Rubén; Mutis, Ana; Manosalva, Loreto; Ceballos, Ricardo; Quiróz, Andrés

doi:10.4067/s0718-95162012000100015

Cited by 24 publications

(21 citation statements)

References 40 publications

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“…1). Briefly, they have been shown to mediate interactions between plants and phytophagous pests such as insect herbivores (Sutherland and Hillier 1974;Guerin and Ryan 1984;Palma et al 2012;Weissteiner et al 2012;Robert et al 2012a) and plant parasitic nematodes (Ali et al 2011;Farnier et al 2012). Volatile cues released by roots damaged by insect herbivores are also implicated in belowground plant indirect defences because they attract organisms of the third trophic level, such as insect predators (Neveu et al 2002;Ferry et al 2007) and entomopathogenic nematodes (van Tol et al 2001;Boff et al 2002;Rasmann et al 2005;Ali et al 2011).…”

Section: Plant Roots Release Vocs Involved In Belowground Biotic Intementioning

confidence: 99%

Root-emitted volatile organic compounds: can they mediate belowground plant-plant interactions?

et al. 2016

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Background Aboveground, plants release volatile organic compounds (VOCs) that act as chemical signals between neighbouring plants. It is now well documented that VOCs emitted by the roots in the plant rhizosphere also play important ecological roles in the soil ecosystem, notably in plant defence because they are involved in interactions between plants, phytophagous pests and organisms of the third trophic level. The roles played by root-emitted VOCs in between-and withinplant signalling, however, are still poorly documented in the scientific literature. Scope Given that (1) plants release volatile cues mediating plant-plant interactions aboveground, (2) roots can detect the chemical signals originating from their neighbours, and (3) roots release VOCs involved in biotic interactions belowground, the aim of this paper is to discuss the roles of VOCs in between-and withinplant signalling belowground. We also highlight the technical challenges associated with the analysis of root-emitted VOCs and the design of experiments targeting volatile-mediated root-root interactions. Conclusions We conclude that root-root interactions mediated by volatile cues deserve more research attention and that both the analytical tools and methods developed to study the ecological roles played by VOCs in interplant signalling aboveground can be adapted to focus on the roles played by root-emitted VOCs in between-and within-plant signalling.

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Section: Plant Roots Release Vocs Involved In Belowground Biotic Intementioning

confidence: 99%

Root-emitted volatile organic compounds: can they mediate belowground plant-plant interactions?

et al. 2016

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“…Our current field experiment and previous laboratory studies conducted by our group (Tapia et al, 2007;Palma et al, 2012) indicated the effectiveness of E-2-hexenal as an attractant for H. obscurus.…”

Section: Discussionmentioning

confidence: 91%

“…For example, Vrkoꞌová et al (2000) reported the attraction of Scolytus intricatus Ratzeburg towards E-2-hexenal, a volatile released from its host oak (Quercus robur L.). Palma et al (2012) reported that in electroantennographic bioassays, H. obscurus showed a strong response to E-2-hexenal, which was associated with significant attraction in olfactometric bioassays.…”

Section: Discussionmentioning

confidence: 99%

Field response of Hylastinus obscurus Marsham (Coleoptera: Curculionidae) to E-2-hexenal and limonene, two host-derived semiochemicals

et al. 2013

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Red clover (Trifolium pratense L.), a valuable legume in Chile, is important mainly for seed production and as forage for animal production. Although it is considered a perennial, the productivity of this legume declines during the second year of growth primarily because of infestation by the red clover root borer, Hylastinus obscurus (Coleoptera: Curculionidae). Currently, there is no efficient method for controlling this insect, although the use of semiochemicals may provide a new alternative to reduce the damage caused by this curculionid. In this context, E-2-hexenal and limonene, which were previously determined to be an attractant and a repellent, respectively, for H. obscurus, were released from dispensers established in two cultivars (Quiñequeli INIA and Superqueli INIA) and one experimental line (Syn II Pre III) of red clover at the Centro Regional de Investigación Carillanca (INIA-Carillanca) (Vilcún, Chile). H. obscurus was found in significantly higher numbers on plants from areas treated with E-2-hexenal than from areas treated with limonene or in areas that were left untreated as control areas. However, this attractiveness was influenced by the red clover source such that the effect of E-2-hexenal was observed in Superqueli INIA and Syn II Pre III but not in Quiñequeli INIA. Unlike previous studies, limonene had no effect on H. obscurus. Our results provide the first evidence under field conditions for the potential use of E-2-hexenal as an attractant for the red clover root borer H. obscurus.

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“…In addition to an overall decrease in VOC concentrations, our study suggested 566 that the composition of VOC blends produced by barley roots varied with plant age as 567 hex-2-enal were detected only in roots of the youngest developmental stages analysed 576 (Palma et al, 2012). 577…”

Section: 5recovery Of Voc Standards Injected Into the Soil 471mentioning

confidence: 83%

Barley (Hordeum distichon L.) roots synthesise volatile aldehydes with a strong age-dependent pattern and release (E)-non-2-enal and (E,Z)-nona-2,6-dienal after mechanical injury

Delory

Delaplace

Jardin

et al. 2016

Plant Physiology and Biochemistry

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Please cite this article as: B.M. Delory, P. Delaplace, P. du Jardin, M.-L. Fauconnier, Barley (Hordeum distichon L.) roots synthesise volatile aldehydes with a strong age-dependent pattern and release (E)-non-2-enal and (E,Z)-nona-2,6-dienal after mechanical injury, Plant Physiology et Biochemistry (2016Biochemistry ( ), doi: 10.1016Biochemistry ( /j.plaphy.2016 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT -2 - Abstract 22In the context of chemical ecology, the analysis of the temporal production 23 pattern of volatile organic compounds (VOCs) in root tissues and the emission rate 24 measurement of root-emitted VOCs are of major importance for setting up 25 experiments to study the implication of these compounds in biotic interactions. Such 26 analyses, however, remain challenging because of the belowground location of plant 27 root systems. In this context, this study describes the evolution of the root VOC 28 production pattern of barley (Hordeum distichon L.) at five developmental stages 29 from germination to the end of tillering and evaluates the emission of the identified 30VOCs in an artificial soil. VOCs produced by crushed root tissues and released by 31 unexcavated root systems were analysed using dynamic sampling devices coupled to 32 a gas chromatography-mass spectrometry methodology (synchronous SCAN/SIM). 33The results showed that, at each analysed developmental stage, crushed barley roots 34 produced mainly four volatile aldehydes: hexanal; (E)-hex-2-enal; (E)-non-2-enal; 35and (E,Z)-nona-2,6-dienal. Higher total and individual VOC concentrations were 36 measured in 3-day-old seminal roots compared with older phenological stages. For 37 each developmental stage, the lipoxygenase (LOX) activity was greater for linoleic 38 acid than α-linolenic acid and the greatest LOX activities using linoleic and α-39 linolenic acids as substrates were measured in 7-and 3-day-old roots, respectively. 40The analysis of VOCs released by barley roots into the soil showed that (E)-non-2-41 enal and (E,Z)-nona-2,6-dienal were the only VOCs emitted in quantifiable amounts 42 by mechanically injured roots. 43 44

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Behavioral and electrophysiological responses of Hylastinus obscurus to volatiles released from the roots of Trifolium pratense L.

Cited by 24 publications

References 40 publications

Root-emitted volatile organic compounds: can they mediate belowground plant-plant interactions?

Root-emitted volatile organic compounds: can they mediate belowground plant-plant interactions?

Field response of Hylastinus obscurus Marsham (Coleoptera: Curculionidae) to E-2-hexenal and limonene, two host-derived semiochemicals

Barley (Hordeum distichon L.) roots synthesise volatile aldehydes with a strong age-dependent pattern and release (E)-non-2-enal and (E,Z)-nona-2,6-dienal after mechanical injury

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