Before gene expression: early events in plant–insect interaction

Maffei, Massimo E.; Mithöfer, Axel; Boland, Wilhelm

doi:10.1016/j.tplants.2007.06.001

Cited by 349 publications

(298 citation statements)

References 70 publications

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“…Elicitors isolated from plant pathogens and their interactions with the plant surface have been studied more intensively than herbivore-released elicitors. Receptor-mediated activation of ion channels or direct interaction with lipid bilayers leading to pore formation appear to be possible mechanisms of pathogen elicitor action (36), but these can also be regulated by insect-derived elicitors (37).…”

Section: Discussionmentioning

confidence: 99%

Male-derived butterfly anti-aphrodisiac mediates induced indirect plant defense

Fatouros¹,

Broekgaarden

Bukovinszkine’Kiss³

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

110

105

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Plants can recruit parasitic wasps in response to egg deposition by herbivorous insects-a sophisticated indirect plant defense mechanism. Oviposition by the Large Cabbage White butterfly Pieris brassicae on Brussels sprout plants induces phytochemical changes that arrest the egg parasitoid Trichogramma brassicae. Here, we report the identification of an elicitor of such an ovipositioninduced plant response. Eliciting activity was present in accessory gland secretions released by mated female butterflies during egg deposition. In contrast, gland secretions from virgin female butterflies were inactive. In the male ejaculate, P. brassicae females receive the anti-aphrodisiac benzyl cyanide (BC) that reduces the females' attractiveness for subsequent mating. We detected this pheromone in the accessory gland secretion released by mated female butterflies. When applied onto leaves, BC alone induced phytochemical changes that arrested females of the egg parasitoid. Microarray analyses revealed a similarity in induced plant responses that may explain the arrest of T. brassicae to egg-laden and BC-treated plants. Thus, a male-derived compound endangers the offspring of the butterfly by inducing plant defense. Recently, BC was shown to play a role in foraging behavior of T. brassicae, by acting as a cue to facilitate phoretic transport by mated female butterflies to oviposition sites. Our results suggest that the antiaphrodisiac pheromone incurs fitness costs for the butterfly by both mediating phoretic behavior and inducing plant defense.egg parasitoid ͉ elicitor ͉ Trichogramma brassicae ͉ Pieris brassicae ͉ Brussels sprouts C hemical signals play a crucial role in the interactions between herbivorous insects and parasitic wasps (1). To locate the tiny eggs of herbivorous host insects in an 'ocean' of plant biomass, egg parasitoids have been shown to employ chemical cues either induced in the plant by host egg deposition or from the adult host stage [i.e., infochemical detour, (2)], whereas only short-range cues emanate from the eggs themselves (3). Plants injured by feeding herbivores often start to release chemical cues that attract predators and parasitoids to effectively defend the plant by killing the herbivores (4, 5). This indirect plant defense may be triggered by compounds in the regurgitant of the herbivore, allowing the plant to discriminate between mechanical wounding and insect feeding (6-8). Plants can also respond before being damaged by insect feeding. Egg deposition by herbivorous insects induces volatiles attractive to egg parasitoids in tritrophic interactions associated with elm, pine, and bean plants (9). The elicitor of these oviposition-induced parasitoid attractants (synomones) was shown to be located in the oviduct secretion of the female herbivore, which is used to glue eggs onto leaves (10,11).Recent data revealed that egg deposition by Pieris brassicae on Brussels sprouts plants (Brassica oleracea var. gemmifera cv. Cyrus) induces chemical changes in the leaf surface that arrest the egg parasi...

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Section: Discussionmentioning

confidence: 99%

Male-derived butterfly anti-aphrodisiac mediates induced indirect plant defense

Fatouros¹,

Broekgaarden

Bukovinszkine’Kiss³

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

110

105

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“…The plot of the difference of Vm after perfusion against Log P, clearly indicates that increasing lipophilicity of hydroxy-ring substituents is correlated to their capability to depolarize the membrane, whereas increased lipophilicity of BA methoxy derivatives parallels their ability to hyperpolarize Vm. In animal cells the relative polarity of either side of the membrane determines the resting, activated (depolarized), or recovering state (hyperpolarized) (Waber 1999), in some plants depolarization has been correlated with increased tolerance to abiotic (Olivetti et al 1995) and biotic stress (Maffei et al 2004(Maffei et al , 2007. The direct comparison between Vm alteration found in the present study and the effect of BA derivatives on germination and enzyme activity and synthesis (Maffei et al 1999, Crisan et al 2007), leads us to suppose the existence of a possible correlation, on the one hand, between depolarizing action of BA OH-ring substituents, and hyperpolarizing activity of BA OCH 3 -ring substituents and inhibition of some metabolic processes.…”

Section: Discussionmentioning

confidence: 99%

“…However experiments with the reversal of the treatment, suggest that pretreatment of root segments with BAs increased membrane Vm hyperpolarization [possibly by altering the membrane permeability (Yu & Matsui 1997) through action on K ' inward channels (Glass & Dunlop 1974)]. However, changes in Vm after perfusion with K ' may also depend on the effects of Ca 2' activity and fluxes (Maffei et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Effect of benzoic acid hydroxyl- and methoxy-ring substituents on cucumber (Cucumis sativusL.) root membrane potential

Camusso

Sacco

Maffei

et al. 2007

Journal of Plant Interactions

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The allelopathic effect of some benzoic acid (BA) OH-and OCH 3 -ring substituents was studied on cucumber root transmembrane potential difference (Vm). Most of the methoxy-BAs induced a rapid Vm depolarization, followed by a Vm hyperpolarization, with the only exception for p -anisic acid (pA). On the other hand, salicylic acid (SA) and 3,4-dimethoxybenzoic acid (DHB) strongly depolarized Vm. A positive correlation was found between Vm hyperpolarization and lipophilicity of methoxylated BAs, whereas a positive correlation was found between lipophilicity and Vm depolarization of hydroxylated BAs. The influence of BAs on K ' was studied by means of specific blocking with Cs ' indicating a possible direct interaction of SA, gallic acid (GA), vanillic acid (VA) and 3,4-dimethoxybenzoic acid (DMB). Interference of BAs with the Vm hyperpolarizing effect of root perfusion with the fungal toxin fusicoccin were also observed.

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“…The results of several studies have suggested that many physical events and chemical signals change quickly in response to wounding (León et al, 2001;Maffei et al, 2007). Other studies have characterized woundresponsive genes induced during plant regeneration, such as the WOUND INDUCED DEDIFFERENTIATION (WIND) family (Iwase et al, 2011a(Iwase et al, , 2011b.…”

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confidence: 99%

Auxin-Independent NAC Pathway Acts in Response to Explant-Specific Wounding and Promotes Root Tip Emergence during de Novo Root Organogenesis in Arabidopsis

et al. 2016

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Plants have powerful regenerative abilities that allow them to recover from damage and survive in nature. De novo organogenesis is one type of plant regeneration in which adventitious roots and shoots are produced from wounded and detached organs. By studying de novo root organogenesis using leaf explants of Arabidopsis (Arabidopsis thaliana), we previously suggested that wounding is the first event that provides signals to trigger the whole regenerative process. However, our knowledge of the role of wounding in regeneration remains limited. In this study, we show that wounding not only triggers the auxin-mediated fate transition of regeneration-competent cells, but also induces the NAC pathway for root tip emergence. The NAC1 transcription factor gene was specifically expressed in response to wounding in the leaf explant, but not in the wounded leaf residue of the source plant. Inhibition of the NAC1 pathway severely affected the emergence of adventitious root tips. However, the NAC1 pathway functioned independently of auxin-mediated cell fate transition and regulates expression of CEP genes, which encode proteins that might have a role in degradation of extensin proteins in the cell wall. Overall, our results suggest that wounding has multiple roles in de novo root organogenesis and that NAC1 acts as one downstream branch in regulating the cellular environment for organ emergence.

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Before gene expression: early events in plant–insect interaction

Cited by 349 publications

References 70 publications

Male-derived butterfly anti-aphrodisiac mediates induced indirect plant defense

Male-derived butterfly anti-aphrodisiac mediates induced indirect plant defense

Effect of benzoic acid hydroxyl- and methoxy-ring substituents on cucumber (Cucumis sativusL.) root membrane potential

Auxin-Independent NAC Pathway Acts in Response to Explant-Specific Wounding and Promotes Root Tip Emergence during de Novo Root Organogenesis in Arabidopsis

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