Les Phénolamides des Rachis de Palmes, Composants de la Réaction de Défense du Palmier Dattier vis‐à‐vis de <i>Fusarium oxysporum</i> f.sp. <i>albedinis</i>, Agent Causal du Bayoud

Ramos, Tatiana Vieira; Bellaj, Mounir El; Idrissi‐Tourane, A. El; Daayf, Fouad; Hadrami, I. El

doi:10.1111/j.1439-0434.1997.tb00355.x

Cited by 27 publications

(9 citation statements)

References 8 publications

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“…PAs are likely to play multiple defence roles in plants (reviewed in Bassard et al 2010). For example, PAs accumulated in response to virus infections in tobacco plants (Martintanguy et al 1976;Torrigiani et al 1997;Rabiti et al 1998), and PAs showed antimicrobial properties in several other plant-pathogen interactions (Grandmaison et al 1993;Ramos et al 1997;Von Röpenack et al 1998;Campos et al 2014). With regard to virus transmission by sucking insects, BPH-induced CoP and FP accumulations ( Fig.…”

Section: Defence Functions Of Pasmentioning

confidence: 99%

Systematic analysis of rice (Oryza sativa) metabolic responses to herbivory

Kabir

Hojo

Christeller

et al. 2015

Plant Cell & Environment

107

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Plants defend against attack from herbivores by direct and indirect defence mechanisms mediated by the accumulation of phytoalexins and release of volatile signals, respectively. While the defensive arsenals of some plants, such as tobacco and Arabidopsis are well known, most of rice's (Oryza sativa) defence metabolites and their effectiveness against herbivores remain uncharacterized. Here, we used a non-biassed metabolomics approach to identify many novel herbivory-regulated metabolic signatures in rice. Most were up-regulated by herbivore attack while only a few were suppressed. Two of the most prominent up-regulated signatures were characterized as phenolamides (PAs), p-coumaroylputrescine and feruloylputrescine. PAs accumulated in response to attack by both chewing insects, i.e. feeding of the lawn armyworm (Spodoptera mauritia) and the rice skipper (Parnara guttata) larvae, and the attack of the sucking insect, the brown planthopper (Nilaparvata lugens, BPH). In bioassays, BPH insects feeding on 15% sugar solution containing p-coumaroylputrescine or feruloylputrescine, at concentrations similar to those elicited by heavy BPH attack in rice, had a higher mortality compared to those feeding on sugar diet alone. Our results highlight PAs as a rapidly expanding new group of plant defence metabolites that are elicited by herbivore attack, and deter herbivores in rice and other plants.

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Section: Defence Functions Of Pasmentioning

confidence: 99%

Systematic analysis of rice (Oryza sativa) metabolic responses to herbivory

Kabir

Hojo

Christeller

et al. 2015

Plant Cell & Environment

107

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“…The main disease control method currently available is the multiplication and use of tolerant/resistant cultivars. Such tolerance/resistance has been reported to be due to the activation of peroxidases (Baaziz, 1989), glucanases and chitinases (Amraoui, 1993), as well as to the accumulation of phenolics (Ziouti et al, 1996; El Hadrami et al, 1997), among which a crucial role has been attributed to hydroxycinnamic acid derivatives (El Hadrami et al, 1997; Ramos et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Defence Responses against Bayoud Disease by Treatment of Date Palm Seedlings with an Hypoaggressive Fusarium oxysporum Isolate

Hassni¹,

Jaiti²,

Dihazi³

et al. 2004

Journal of Phytopathology

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Pretreatment of date palm seedlings with an hypoaggressive Fusarium isolate (AHD) protected them partially from further infection by Fusarium oxysporum f.sp. albedinis (Foa), the Bayoud disease pathogen. No mortality occurred during 2-3 months of incubation in plants pretreated with AHD, as opposed to aggressive isolate (ZAG) inoculated controls where up to 100% mortality was observed 15-30 days after inoculation. Such protection involved biochemical interactions between the host plant and AHD since no direct competition or antagonism was revealed between AHD and ZAG. The examination of the accumulation of phenolics and peroxidase activity, two parameters previously reported to be involved in date palm resistance to Foa, indicated that the response to AHD was correlated with the ability of pretreated date palm tissues to establish a faster defence response in the roots of both susceptible and resistant cultivars. Plants pretreated with AHD accumulated higher amounts of phenolics, mainly nonconstitutive hydroxycinnamic acid derivatives, which play a crucial role in date palm defence against Foa, as previously described by our group. These compounds were accumulated along with the constitutive caffeoylshikimic acids. A faster induction of peroxidase activity in response to Foa was also recorded in plants pretreated with AHD. Given the multi-component nature of these induced responses, AHD could be part of integrated disease management strategies for a sustainable control of the palm tree Bayoud disease.U. S.

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“…Phenylamides are secondary metabolites that result from the conjugation of aliphatic polyamines or arylmonoamines and hydroxycinnamic acids (Walters 2003;Edreva et al 2007). These secondary metabolites have been reported in many plant responses to biotic and abiotic stresses (Martin-Tanguy et al 1973;Clarke 1982;Ramos et al 1997). For instance, formation of highly fluorescent conjugates of cinnamic and p-coumaric acids, with either tyramine or octopamine, were often observed in potato tuber tissues inoculated with an avirulent isolate of Phytophthora infestans (Clarke 1982).…”

Section: Discussionmentioning

confidence: 99%

Priming canola resistance to blackleg with weakly aggressive isolates leads to an activation of hydroxycinnamates

Hadrami

Daayf

2009

Canadian Journal of Plant Pathology

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Blackleg (Phoma leaf spot), caused by the ascomycete Leptosphaeria spp. (anamorph: Phoma lingam), is a serious yield-limiting factor in canola. Leptosphaeria spp. populations are highly diverse and display differential interactions with canola cultivars, ranging from hypersensitive-like reactions to partial resistance and susceptibility. Leptosphaeria biglobosa encompasses weakly aggressive isolates and can be found late in the season towards maturity stages of the crop while other isolates from Leptosphaeria maculans are highly aggressive and can be detected throughout the season. In an earlier study, we showed the primary involvement of lignin in the containment of the progress of Phoma leaf spot symptoms around the infection sites by comparing the reaction of three different cultivars with a set of isolates with various levels of aggressiveness. The present investigation reports on further characterization of the host responses to L. biglobosa and L. maculans isolates used individually or subsequently in the infection. Hydroxycinnamates were the major phenolics that differentially accumulated locally or systemically from the infection sites in response to either pre-or co-inoculation with the weakly aggressive isolate tested. Given the involvement of these hydroxycinnamates as precursors for the synthesis of lignin and phenylamide phytoalexins, their detected amounts in response to the priming with a weakly aggressive isolate could explain the restricted development of further inoculated highly aggressive isolates.Résumé : Le chancre noir (phoma), causé par l'ascomycète Leptosphaeria spp. (forme imparfaite : Phoma lingam), constitue un facteur limitant au rendement du canola. Les populations de Leptosphaeria spp. sont très diversifiées et montrent des interactions différentielles, variant de l'hypersensibilité à la résistance partielle ou la sensibilité, vis-à-vis des cultivars de canola. Leptosphaeria biglobosa se compose d'isolats peu agressifs qui n'apparaissent que tard dans la saison quand les plantes ont atteint leur maturité. Leptosphaeria maculans comporte des isolats très agressifs et peut être détecté durant toute la saison de production. Dans une étude précédente comparant les réactions différentielles de trois cultivars à une série d'isolats ayant des niveaux différents d'agressivité, nous avions montré le rôle de la lignine comme composante principale dans la restriction de la progression des symptômes de la maladie autour des sites d'infection. La présente étude fait davantage état de la caractérisation des réponses de l'hôte aux isolats de L. biglobosa et de L. maculans, inoculés soit séparément soit l'un après l'autre. Les dérivés hydroxycinnamiques sont les principaux composés phénoliques accumulés de manière différentielle, que ce soit localement autours des sites d'infection ou systémiquement, en réaction à la pré-ou à la co-inoculation avec l'isolat peu agressif étudié. Étant donné le rôle de ces dérivés hydroxycinnamiques comme précurseurs dans la synthèse de la lignine et de celle des phy...

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Les Phénolamides des Rachis de Palmes, Composants de la Réaction de Défense du Palmier Dattier vis‐à‐vis de Fusarium oxysporum f.sp. albedinis, Agent Causal du Bayoud

Cited by 27 publications

References 8 publications

Systematic analysis of rice (Oryza sativa) metabolic responses to herbivory

Systematic analysis of rice (Oryza sativa) metabolic responses to herbivory

Enhancement of Defence Responses against Bayoud Disease by Treatment of Date Palm Seedlings with an Hypoaggressive Fusarium oxysporum Isolate

Priming canola resistance to blackleg with weakly aggressive isolates leads to an activation of hydroxycinnamates

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