Oxylipins Other Than Jasmonic Acid Are Xylem-Resident Signals Regulating Systemic Resistance Induced by <i>Trichoderma virens</i> in Maize

Wang, Ken-Der; Borrego, Eli J.; Kenerley, Charles M.; Kolomiets, Michael V.

doi:10.1105/tpc.19.00487

Cited by 119 publications

(134 citation statements)

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“…12-OPDA showed the highest constitutive and total induced levels among the 13-oxylipins, and is a JA precursor that has a signalling role distinct from the canonical phytohormone JA-Ile [81]. Recent studies supported such a unique role for 12-OPDA in maize by showing that it, but not JA, is a major defence signal against sap-sucking aphids [82], and a long-distance signal in symbiont-induced systemic resistance against pathogens [23]. Total induced levels of 12-OPDA were highest in BTEO, intermediate in USIL, and lowest in MXLR and USLR.…”

Section: Domestication Engaged Activation Of 9-oxylipins and Diminishmentioning

confidence: 99%

“…The supernatant (90 µL) was analysed by liquid chromatography-mass spectrometry (API 3200, QqQ; Sciex, Framingham, MA) ran in negative ESI mode. The column used was an Ascentis Express 30 × 2.1 mm 2.7 µm solid core column following the mobile phases and elution conditions as described by [23].…”

Section: Metabolite Extraction and Quantificationmentioning

confidence: 99%

“…A mortar and pestle were used to grind root tissues in liquid nitrogen. The ground tissue samples were kept at -80 °C until metabolite extraction [4,23].…”

Section: Introductionmentioning

confidence: 99%

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Maize Biochemical Defences against a Rootworm Were Mediated by Domestication, Spread, and Breeding

Fontes-Puebla

Borrego

Kolomiets

2020

Preprint

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258 words) Plant physiological processes generally are regulated by phytohormones, including plant biochemical responses to herbivory. Here, we addressed whether a suite of maize (Zea mays mays) phytohormones, including some precursor and derivative metabolites, relevant to herbivory defence were mediated by the crop's domestication, northward spread, and modern breeding. For this, we compared phytohormone and metabolite levels among four plant types representing the evolutionary and agronomic transitions from maize's wild ancestor, Balsas teosinte (Zea mays parviglumis), to Mexican and US maize landraces, and to highly-bred US maize cultivars, as affected by root herbivory by Western corn rootworm (Diabrotica virgifera virgifera). Following ecological-evolutionary hypotheses, we expected to find changes in: (i) maize defence strategy, from reliance on induced to constitutive defences; (ii) levels of phytohormones relevant to herbivore resistance consistent with gradual weakening of defences, and; (iii) levels of a phytohormone relevant to herbivory tolerance because it positively affects plant growth. We found that with its domestication, maize seemed to have transitioned from reliance on induced defences in Balsas teosinte to reliance on constitutive defences in maize. Also, we found that while one subset of phytohormones relevant to herbivory was suppressed (13-oxylipins), another was enhanced (9-oxylipins) with domestication, and both subsets were variably affected by spread and breeding. Finally, an auxin phytohormone directly linked to growth (indole-3acetic acid), increased significantly with domestication, and seemingly with spread and breeding. We concluded that rootworm defences in maize were mediated by domestication and ensuing processes, such as spread and breeding, and argued that agricultural intensification mediated maize defence evolution in parallel with modern breeding.

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Section: Domestication Engaged Activation Of 9-oxylipins and Diminishmentioning

confidence: 99%

Section: Metabolite Extraction and Quantificationmentioning

confidence: 99%

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Maize Biochemical Defences against a Rootworm Were Mediated by Domestication, Spread, and Breeding

Fontes-Puebla

Borrego

Kolomiets

2020

Preprint

Self Cite

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“…In fungi, sphingolipids are important for hyphae formation (Oura & Kajiwara, 2010), regulating cell growth and differentiation (Obeid et al, 2002), and cell division (Epstein et al, 2012). In addition, lipidderived molecules are essential for intra-and extra-cellular signaling and for defense against the proliferation of undesired microbes (Hou et al, 2016;Siebers et al, 2016;Singh & Del Poeta, 2016;Wang et al, 2020). Lipid peroxidation of free fatty acids, acyl groups of triacylglycerols or galactolipids, is commonly activated to induce defense against pathogens.…”

Section: Symbiosis Caused Profound Changes In the Lipid Content Of Tmentioning

confidence: 99%

Metabolomic adjustments in the orchid mycorrhizal fungus Tulasnella calospora during symbiosis with Serapias vomeracea

et al. 2020

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 All orchids rely on mycorrhizal fungi for organic carbon, at least during early development. Orchid seed germination leads in fact to the formation of a protocorm, a heterotrophic postembryonic structure colonized by intracellular fungal coils, thought to be the site for nutrients transfer. The molecular mechanisms underlying mycorrhizal interactions and metabolic changes induced by this peculiar symbiosis in both partners remain mostly unknown.  We studied plant-fungus interactions in the mycorrhizal association between the Mediterranean orchid Serapias vomeracea and the basidiomycete Tulasnella calospora using non-targeted metabolomics. Plant and fungal metabolomes obtained from symbiotic structures were compared with those obtained under asymbiotic conditions.  Symbiosis induced profound metabolomic alterations in both partners. In particular, structural and signaling lipid compounds sharply increased in the external fungal mycelium growing near the symbiotic protocorms, whereas chito-oligosaccharides were identified uniquely in symbiotic protocorms.  This work represents the first description of metabolic changes occurring in orchid mycorrhiza. These results-supported by transcriptomic data-provide novel insights on the mechanisms underlying the orchid mycorrhizal association and open intriguing questions on the role of fungal lipids in this symbiosis.

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“…T. virens has been studied intensively for its potential biological control (Angel et al, 2016;Angel, Sundram, Ping, Yusof, & Ismail, 2018) and mycoparasitism has been reported as the most common strategies to control pathogen (Strakowska, Błaszczyk, & Chełkowski, 2014). T. virens also reported induced systemic resistance that effective against a broad range of pathogens ( Wang, Borrego, Kenerley, & Kolomiets, 2020). Our previous study showed that seven indigenous T. virens strains from forty indigenous Trichoderma isolates were effective to suppress the growth of different soil-borne pathogens such as Rhizoctonia solani (R.s1), R. solani (R.s2), and Fusarium sp.…”

Section: Introductionmentioning

confidence: 99%

Mycoparasitic Activity of Indigenous Trichoderma virens Strains Against Mungbean Soil Borne Pathogen Rhizoctonia solani: Hyperparasite and Hydrolytic Enzyme Production

et al. 2020

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Rhizoctonia solani is one of the harmful pathogens on mungbean, which is very challenging to be controlled. T. virens has been studied intensively and has great potency to control R. solani through mycoparasitism. Seven strains of T. virens isolated from various rhizospheres were tested for their mycoparasitic potential by observing their hyperparasitism and the production of hydrolytic enzymes. All strains showed the ability to suppress the growth of R. solani on dual culture assay as well as on culture filtrate test with the inhibition ability from 43.8 to 68.6% on the dual culture assay and from 22.2 to 71.1% on the culture filtrate assay. Inter-fungal interaction, which was observed by an electron microscope, showed hyperparasitic action of T. virens against R. solani involved the formation of the knob-like structure followed by the growth of Trichoderma hyphae inside host mycelia, coiling, lysed cell wall, and swollen of mycelial tips. Mycoparasitism of T. virens also correlated with the synthesis of hydrolytic enzymes, such as cellulase and chitinase, which influenced the overall hyperparasitic ability of T. virens against the pathogen. Based on in vitro assay, the Tv3 strain proposed as a promising strain to control R. solani due to its high growth inhibition and relatively high cellulase and chitinase productionse.

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Oxylipins Other Than Jasmonic Acid Are Xylem-Resident Signals Regulating Systemic Resistance Induced by Trichoderma virens in Maize

Cited by 119 publications

References 99 publications

Maize Biochemical Defences against a Rootworm Were Mediated by Domestication, Spread, and Breeding

Maize Biochemical Defences against a Rootworm Were Mediated by Domestication, Spread, and Breeding

Metabolomic adjustments in the orchid mycorrhizal fungus Tulasnella calospora during symbiosis with Serapias vomeracea

Mycoparasitic Activity of Indigenous Trichoderma virens Strains Against Mungbean Soil Borne Pathogen Rhizoctonia solani: Hyperparasite and Hydrolytic Enzyme Production

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