Induced resistance in sweet orange against Xanthomonas citri subsp. citri by hexanoic acid

Llorens, Eugenio; Vicedo, Begonya; López, Marı́a M.; Lapeña, Leonor; Graham, James H.; García‐Agustín, Pilar

doi:10.1016/j.cropro.2015.04.008

Cited by 24 publications

(29 citation statements)

References 45 publications

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“…Citrumelo (Hasse) (Graham and Myers, 2011). Similar to those in apple, greenhouse treatments with ASM in 'Pineapple' sweet orange (Citrus sinensis Osbeck) plants induced a PR-2 response that lasted up to 21 days after foliar application (Llorens et al, 2015). On the contrary, soil applications of ASM achieved almost total protection with 80 % lesion reduction for several weeks after soil application which was directly correlated with a persistent expression of the PR-2 gene form (Francis et al, 2009).…”

Section: Synthetic Resistance Inducersmentioning

confidence: 78%

“…Moreover, Hx application to sweet orange plants (Citrus sinensis Osbeck) reduced the incidence of Xanthomonas citri subsp. citri by 50 % and activated the expression of the PR-2 gene (Llorens et al, 2015).…”

Section: Natural Resistance Inducers Natural Compounds: Hexanoic Acidmentioning

confidence: 99%

“…These compounds have the advantage of being easily found in nature such as chitin from crustaceous exoskeletons (Xing et al, 2015) or laminarin from algae (Aziz et al, 2003). Application of these resistance inducers, either synthetic or natural, can protect the plants against a broad spectrum of diseases caused either by fungi or bacteria, such as brown spot caused by Alternaria alternata Keissl or citrus canker caused by Xanthomonas citri (Hasse) (Conrath, 2009;Jakab et al, 2001;Llorens et al, 2013;Llorens et al, 2015), including a number of crop diseases that are difficult to control through conventional management disease strategies (Li et al, 2015). However, despite the positive results these compounds have shown in model plants and herbaceous crops, only a few of them have been tested in woody plants.…”

Section: Effectiveness Of Induced Resistance In Conventional Woody Cropsmentioning

confidence: 99%

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Advances in induced resistance by natural compounds: towards new options for woody crop protection

Llorens

García‐Agustín

Lapeña

2017

Sci. agric. (Piracicaba, Braz.)

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The activation of defensive responses of plants is a promising tool for controlling pests in conventional agriculture. Over the last few years, several compounds have been studied to protect crops from pests, without displaying direct toxicity for pathogenic organisms. These compounds have the ability to induce a priming state on the plants that results in resistance (or tolerance) against subsequent infection by a pathogen. In terms of molecular response, induced plant defense involves a broad number of physical and biochemical changes such as callose deposition or phenolic compounds, activation of salicylic and/or jasmonic acid pathways or synthesis of defense-related enzymes. Despite the large number of studies performed to ascertain the physiological and biochemical basis of induced resistance, only a few resistance-activating compounds have been studied as a real alternative to classic means of control and the studies geared towards incorporating induced resistance into disease management programs are relatively rare. The incorporation of natural resistance inducer in pest management programs of woody crops, alone or in combination with classical methods, could be a reliable method for reducing the amount of chemical residues in the environment. In this review, we discuss the current knowledge of induced resistance in woody crops, focusing on the mode of action of compounds authorized for conventional agriculture. We conclude by discussing the environmental and economic advantages of applying resistance inducers to conventional agriculture with special emphasis on natural compounds.

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Section: Synthetic Resistance Inducersmentioning

confidence: 78%

Section: Natural Resistance Inducers Natural Compounds: Hexanoic Acidmentioning

confidence: 99%

Section: Effectiveness Of Induced Resistance In Conventional Woody Cropsmentioning

confidence: 99%

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Advances in induced resistance by natural compounds: towards new options for woody crop protection

Llorens

García‐Agustín

Lapeña

2017

Sci. agric. (Piracicaba, Braz.)

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“…In fact, natural citrus defense mechanisms can be activated by using these natural or synthetic elicitors (Llorens et al, 2013(Llorens et al, , 2015. Vicedo et al (2009) reported that the presence of carboxylic acids can induce the production of bioactive molecule jasmonate-isoleucine, which is associated with abscisic and hexanoic acids.…”

Section: Discussionmentioning

confidence: 99%

“…Hall et al (2015) reported that using resistant plants is a promising strategy to deal with the vector and the HLB causing bacteria. Llorens et al (2015) reported that natural defense mechanisms of plants may be strengthened by elicitors use. This work aimed analyzing the nutritional status of orange tree 'Pêra Rio' infected with Ca.…”

Section: Introductionmentioning

confidence: 99%

Nutritional status of orange tree ‘Pêra Rio’ variety after Huanglongbing disease infection, leaf spray fertilization and application of resistance-inducing bioinductors

Ferraz¹,

Barbosa²,

Viégas³

et al. 2017

Aust J Crop Sci

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Citrus industry is widespread in the world. The Huanglongbing is an important disease of citrus species and has been spread around the world. This research analyzed the nutritional status of tree 'Pêra Rio' variety infected with Candidatus Liberibacter spp., under leaf nutrients spray and bioinductors of resistance. The experiment was carried out from September 2013 to June 2014, in a citrus commercial orchard located in the city of Ibitinga (SP). A completely randomized design was used in a factorial 3 × 4 × 6, consisting of three plants status (healthy, infected with asymptomatic HLB, and symptomatic HLB), four rates of spray solutions (0, 2, 4 and 6 L ha -1 ), six application stages (A 1 , A 2 , A 3 , A 4 , A 5 , and A 6 with intervals of 45 days between each stage) and four replications. Macro and micronutrients leaf levels were quantified. Data were submitted to exploratory factor analysis with multivariate statistics. Three factors were extracted from the variables, namely, Factor 1 formed by variables S, Cu, Fe, and Zn; Factor 2 by N, K and B, and Factor 3 by Ca, Mg, and Mn. 'Pêra Rio' plants nutritional status was destabilized with the infection of Candidatus Liberibacter spp. Progressive treatment with leaf fertilization and resistance bioinductors temporarily re-established nutritional standards of plants affected by Huanglongbing but did not promote stability of the plants nutritional status.

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Elucidating the mechanism of action of copper heptagluconate on the plant immune system against Pseudomonas syringae in tomato (Solanum lycopersicum L)

González-Hernández

Llorens

Agustí-Brisach

et al. 2018

Pest Management Science

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Results showed that soil drench applications can be highly effective for the prevention and control of bacterial speck in tomato plants, showing a reduction in symptoms of ∼ 50%. Moreover, application of Cu heptagluconate induced accumulation of the plant polyphenols caffeic and chlorogenic acids, and reduced the amount of reactive oxygen species in infected plants. © 2018 Society of Chemical Industry.

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Induced resistance in sweet orange against Xanthomonas citri subsp. citri by hexanoic acid

Cited by 24 publications

References 45 publications

Advances in induced resistance by natural compounds: towards new options for woody crop protection

Advances in induced resistance by natural compounds: towards new options for woody crop protection

Nutritional status of orange tree ‘Pêra Rio’ variety after Huanglongbing disease infection, leaf spray fertilization and application of resistance-inducing bioinductors

Elucidating the mechanism of action of copper heptagluconate on the plant immune system against Pseudomonas syringae in tomato (Solanum lycopersicum L)

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