Oligogalacturonides and chitosan activate plant defensive genes through the octadecanoid pathway.

Doares, Steven H.; Syrovets, Tatiana; Weiler, Elmar W.; Ryan, Clarence A.

doi:10.1073/pnas.92.10.4095

Cited by 435 publications

(254 citation statements)

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“…Mechanical wounding or supplying systemin to young tomato plants through their cut stems results in a rapid and transient accumulation of linolenic acid (Conconi et al, 1996) and JA (Doares ef al., 1995). Inhibitors of the octadecanoid pathway block the induction of defense genes by systemin and linolenic acid (Farmer et al, 1994;Doares et al, 1995). A tomato mutant impaired in the octadecanoid pathway, called defl (Howe et al, 1996), only weakly expresses defense genes following wounding or supplying excised plants with systemin, linolenic acid, or carbohydrate elicitors.…”

Section: Damage To Leaves Of Tomato (Lycopersicon Esculentum)mentioning

confidence: 99%

A Gene Encoding a Chloroplast-Targeted Lipoxygenase in Tomato Leaves Is Transiently Induced by Wounding, Systemin, and Methyl Jasmonate

1997

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Section: Damage To Leaves Of Tomato (Lycopersicon Esculentum)mentioning

confidence: 99%

A Gene Encoding a Chloroplast-Targeted Lipoxygenase in Tomato Leaves Is Transiently Induced by Wounding, Systemin, and Methyl Jasmonate

1997

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“…It has attracted great interest for its properties, including biodegradability, bioaffinity, low toxicity, film-forming capacity [11,25] and ascendant permeability [26]. Besides, chitosan can induce plants to generate a defense response [27]. To our regret, when preparing the BCCM, chitosan was dissolved by acetic acid, which unexpectedly damaged the fruit.…”

Section: Discussionmentioning

confidence: 99%

Disease control during peach preservation with a berberine-chitosan composite membrane

Yan¹,

Tian³

2012

Fruits

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Disease control during peach preservation with a berberine-chitosan composite membrane.Abstract -Introduction. Peach brown rot caused by the fungus Monilinia fructicola is a major disease leading to considerable economic loss during storage. Our previous study uncovered the striking inhibition of the natural alkaloid berberine against M. fructicola. Materials and methods. A berberine-chitosan composite membrane (BCCM) able to slowly release berberine was prepared and used for peach preservation. The examined fruits were stored at 4°C and treated as follows: (I) control fruits without packaging; (ii) fruits that were transiently immersed in pre-solidified BCCM liquid and taken out; (iii) fruit coating either with a BCCM, or with a membrane containing chitosan only (without berberine), and (iv) fruit coating with a PVC membrane. Results and discussion. The group immersed in BCCM showed a high infection rate due to the cytotoxicity of acetic acid, but the coating group showed only a 10% infection rate after 40 days of storage. Moreover, the BCCM-coating group showed a significantly lower infection rate than that coated with chitosan membrane (without berberine), clearly indicating the antimicrobial activity of berberine therein. Consequently, packed in BCCM and stored at 4°C, peach fruits could be well preserved over 40 days with very low infection. Conclusion. Considering its safety and low cost, the berberine-containing chitosan composite membrane could be applicable in controlling diseases during peach storage.China / Prunus persica / peaches / storage / disease control / Monilinia fructicola / postharvest technology / coating / membranes Protection sanitaire de la pêche en cours de stockage à l'aide d'une membrane composite de berbérine-chitosane.Résumé -Introduction. La pourriture brune de la pêche causée par le champignon Monilinia fructicola est une maladie grave entraînant une perte économique considérable pendant le stockage. L'une de nos études précédentes avait mis en évidence l'inhibition surprenante de la berbérine, alcaloïde naturel, contre M. fructicola. Matériel et méthodes. Une membrane composite de berbérine-chitosane (BCCM) capable de libérer lentement de la berbérine a été préparée et utilisée pour la protection de pêches. Les fruits étudiés ont été stockés à 4°C et ont subi les traitements suivant : (i) fruits témoins sans emballage; (ii) fruits transitoirement immergés dans une solution de BCCM pré-solidifiée, puis sortis; (iii) fruits revêtus soit avec une membrane BCCM, soit avec une membrane à base de chitosane seule (sans berbérine), et (iv) fruits revêtus avec un film de PVC. Résultats et discussion. Les fruits immergés dans une solution de BCCM ont montré un taux d'infection élevé du fait de la cytotoxicité de l'acide acétique présent dans le liquide, mais les fruits avec revêtement n'ont présenté que 10 % de fruits infectés après 40 jours de stockage. De plus, les fruits revêtus d'une membrane BCCM ont présenté un taux d'infection significativement plus faible que celui des fruits revêt...

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“…It is water-soluble, nontoxic, biocompatible, and possesses versatile functional properties (Kim and Rajapakse 2005;Bautista-Banos et al 2006). COS can elicit various defense responses, such as the synthesis of reactive species (ROS) (Lin et al 2005;Li et al 2009) and jasmonate acid (Doares et al 1995), enhancement of cell wall lignifications and production of phytoalexins, accumulation of defense-related proteinase activities (Jayaraj et al 2009;Yin et al 2010), as well as Communicated by J. Zou.…”

Section: Introductionmentioning

confidence: 99%

Nitric oxide production and its functional link with OIPK in tobacco defense response elicited by chitooligosaccharide

et al. 2011

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Chitooligosaccharide (COS) or oligochitosan has been shown to induce tobacco defense responses which are connected with nitric oxide (NO) and OIPK (oligochitosan-induced Ser/Thr protein kinase). The aim of this study was to reveal the relationship between NO production and OIPK pathway in the defense response of tobacco elicited by COS. NO generation was investigated by epidermal strip bioassay and fluorophore microscope using fluorophore diaminofluorescein diacetate (DAF-2DA). Tobacco epidermal cells treated with COS resulted in production of NO, which was first present in chloroplast, then in nucleus, finally in the whole cell; this NO production was sensitive to NO scavenger cPTIO and the mammalian NO synthase (NOS) inhibitor L-NAME, suggesting that NOS-like enzyme maybe involved in NO generation in tobacco epidermal cells. However, NOS and nitrate reductase (NR, EC 1.6.6.1) inhibitors reduced NO content in tobacco leaves by using NO Assay Kit, suggesting both NOS and NR were involved in NO production in tobacco leaves. Using a pharmacological approach and western blotting, we provide evidence that NO acts upstream of OIPK expression. NO scavenger, NOS inhibitor partly blocked the activation of OIPK and the activities of several defense-related enzymes induced by COS; treatment with NO donor sodium nitroprusside (SNP) induced the activation of OIPK and enhanced the defense systems. The results suggest that COS is able to induce NO generation, which results in up-regulation the activities of some defense-related enzymes through an OIPK-dependent or independent pathway.

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Oligogalacturonides and chitosan activate plant defensive genes through the octadecanoid pathway.

Cited by 435 publications

References 35 publications

A Gene Encoding a Chloroplast-Targeted Lipoxygenase in Tomato Leaves Is Transiently Induced by Wounding, Systemin, and Methyl Jasmonate

A Gene Encoding a Chloroplast-Targeted Lipoxygenase in Tomato Leaves Is Transiently Induced by Wounding, Systemin, and Methyl Jasmonate

Disease control during peach preservation with a berberine-chitosan composite membrane

Nitric oxide production and its functional link with OIPK in tobacco defense response elicited by chitooligosaccharide

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