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Oostendorp, M.; Kunz, Walter; Dietrich, Bob; Staub, T.

doi:10.1023/a:1008760518772

Cited by 405 publications

(53 citation statements)

References 33 publications

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“…In both cases, the disease control was attributed to the activation of JA pathway. In this sense, the control of tomato bacterial spot provided by the application of EPS could be the result of the activation of more than one metabolic pathway, unlike the ASM, compound similar to salicylic acid, which primarily triggers those metabolites from the phenylpropanoid pathway (Oostendorp et al, 2001).…”

Section: Characmentioning

confidence: 99%

Lactobacillus plantarum Exopolysaccharides Induce Resistance against Tomato Bacterial Spot

Blainski¹,

Neto²,

Luiz³

et al. 2017

JAS

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Lactic acid bacteria produce several exopolysaccharides (EPS) that may have antimicrobial action and/or induce defense responses in plants. This work aims to evaluate the potential of EPS produced by Lactobacillus plantarum in the protection of tomato plants against bacterial spot caused by Xanthomonas gardneri, as well as to predict the possible mechanisms of action. The EPS were characterized through FTIR and applied at 0; 0.5; 1.5 and 3.0 mg mL -1 in tomato plants with five expanded leaves, followed by the pathogen inoculation after 3 or 7 days. Antimicrobial activity of the biopolymer (1.5 or 10.0 mg mL -1 ) was evaluated in bioassay when EPS was incorporated into culture medium or embedded in antibiogram disk. The defense mechanisms i.e., total phenolic compounds and flavonoids content, phenylalanine ammonia-lyase (PAL), glutathione reductase (GR) and lipoxygenase (LOX) activities, were measured in tomato plants treated with EPS (1.5 mg mL -1 ), inoculated or not with X. gardneri. EPS reduced bacterial spot symptoms by up to 72.0% compared to the control. There were no direct effects of EPS on the in vitro growth of X. gardneri. The spectrophotometric profile, ascorbic and ellagic acid concentrations were change in tomato plants after EPS application, in plants challenged with the pathogen. Increases in PAL, GR and LOX activities were observed in plants treated with EPS. Thus, the application of L. plantarum exopolysaccharides can be considered as an effective alternative for controlling bacterial spot in tomato plants. This paper also discusses how these exopolysaccharides reduced the severity of the disease.

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Section: Characmentioning

confidence: 99%

Lactobacillus plantarum Exopolysaccharides Induce Resistance against Tomato Bacterial Spot

Blainski¹,

Neto²,

Luiz³

et al. 2017

JAS

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“…Non-toxic alternatives in plant protection such as the use of PRIs activating the plants’ own defense could therefore come to play an even more important role in developing countries. Furthermore, many PRIs give a broad spectrum resistance, which in turn lessens the likelihood of the development of pathogen pesticide resistance [20]. For example, probenazole has been used against Magnaporthe grisea , the rice blast fungus, and Xanthomonas , causing bacterial leaf blight in rice, for more than 30 years and resistance in the pathogen has not been reported [21].…”

Section: Introductionmentioning

confidence: 99%

Plant Resistance Inducers against Pathogens in Solanaceae Species—From Molecular Mechanisms to Field Application

Alexandersson

Mulugeta

Lankinen

et al. 2016

IJMS

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This review provides a current summary of plant resistance inducers (PRIs) that have been successfully used in the Solanaceae plant family to protect against pathogens by activating the plant’s own defence. Solanaceous species include many important crops such as potato and tomato. We also present findings regarding the molecular processes after application of PRIs, even if the number of such studies still remains limited in this plant family. In general, there is a lack of patterns regarding the efficiency of induced resistance (IR) both between and within solanaceous species. In many cases, a hypersensitivity-like reaction needs to form in order for the PRI to be efficient. “-Omics” studies have already given insight in the complexity of responses, and can explain some of the differences seen in efficacy of PRIs between and within species as well as towards different pathogens. Finally, examples of field applications of PRIs for solanaceous crops are presented and discussed. We predict that PRIs will play a role in future plant protection strategies in Solanaceae crops if they are combined with other means of disease control in different spatial and temporal combinations.

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“…Various such treatments have been shown to successfully induce resistance. They consist among others of an inoculation with pathogens, rhizobacteria or a treatment with defined chemicals and lead to horizontal resistance of the plant against a broad range of pathogenic organisms (van Loon et al, 1998; Oostendorp et al, 2001; Cohen, 2002; Hammerschmidt, 2009). This resistance operates in all plant parts distant from the original locus of inoculation and is therefore called systemic resistance (Durrant and Dong, 2004).…”

Section: Introductionmentioning

confidence: 99%

Preparing to fight back: generation and storage of priming compounds

et al. 2014

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Immune-stimulated plants are able to respond more rapidly and adequately to various biotic stresses allowing them to efficiently combat an infection. During the priming phase, plant are stimulated in absence of a challenge, and can accumulate and store conjugates or precursors of molecules as well as other compounds that play a role in defense. These molecules can be released during the defensive phase following stress. These metabolites can also participate in the first stages of the stress perception. Here, we report the metabolic changes occuring in primed plants during the priming phase. β-aminobutyric acid (BABA) causes a boost of the primary metabolism through the tricarboxylic acids (TCA) such as citrate, fumarate, (S)-malate and 2-oxoglutarate, and the potentiation of phenylpropanoid biosynthesis and the octodecanoic pathway. On the contrary, Pseudomonas syringae pv tomato (PstAvrRpt2) represses the same pathways. Both systems used to prime plants share some common signals like the changes in the synthesis of amino acids and the production of SA and its glycosides, as well as IAA. Interestingly, a product of the purine catabolism, xanthosine, was found to accumulate following both BABA- and PstAvrRpt2-treatement. The compounds that are strongly affected in this stage are called priming compounds, since their effect on the metabolism of the plant is to induce the production of primed compounds that will help to combat the stress. At the same time, additional identified metabolites suggest the possible defense pathways that plants are using to get ready for the battle.

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Untitled

Cited by 405 publications

References 33 publications

Lactobacillus plantarum Exopolysaccharides Induce Resistance against Tomato Bacterial Spot

Lactobacillus plantarum Exopolysaccharides Induce Resistance against Tomato Bacterial Spot

Plant Resistance Inducers against Pathogens in Solanaceae Species—From Molecular Mechanisms to Field Application

Preparing to fight back: generation and storage of priming compounds

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