Signalling Networks Involved in Induced Resistance

Pieterse, C.M.J.; Zamioudis, Christos; Does, Dieuwertje van der; Wees, Saskia C.M. Van

doi:10.1002/9781118371848.ch4

Cited by 18 publications

(15 citation statements)

References 196 publications

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“…On the other hand, other studies have shown that tomato plants treated with exogenous JA produced lower number of fruits with less seeds compared to untreated plants [61], which indicates trade-offs between defenses and reproduction. Therefore, trade-offs are highly context dependent and visible only under specific environmental conditions [5], as well as variable across plant traits. To summarize, our experiment concords with previous results on the same system, indicating that JA signaling pathway strongly mediates changes in plant trait expression, resource allocation, and development.…”

Section: Effect Of Ja On Plant Functional Traitsmentioning

confidence: 99%

“…To cope with biotic attack, plants have evolved a plethora of defensive strategies, which range from nutrient allocation and overcompensation of damaged tissue to mechanical and chemical defenses [2][3][4]. The coordination of the plant defense responses to biotic attack is mediated by plant hormones [5], of which jasmonic acid (JA), salicylic acid (SA), and ethylene (ET) are the most crucial. Other phytohormones, such as abscissic acid (ABA), gibberellins, auxins, and cytokinins, however, are emerging as important defense regulators as well [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Mycorrhizal Fungi Enhance Resistance to Herbivores in Tomato Plants with Reduced Jasmonic Acid Production

Formenti

Rasmann

2019

Agronomy

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Arbuscular mycorrhizal (AM) fungi favor plant growth by improving nutrient acquisition, but also by increasing their resistance against abiotic and biotic stressors, including herbivory. Mechanisms of AM fungal mediated increased resistance include a direct effect of AM fungi on plant vigor, but also a manipulation of the hormonal cascades, such as the systemic activation of jasmonic acid (JA) dependent defenses. However, how AM fungal inoculation and variation in the endogenous JA production interact to produce increased resistance against insect herbivores remains to be further elucidated. To address this question, three genotypes of Solanum lycopersicum L., a JA-biosynthesis deficient mutant, a JA over-accumulating mutant, and their wild-type were either inoculated with AM fungi or left un-inoculated. Plant growth-related traits and resistance against Spodoptera littoralis (Boisduval) caterpillars, a major crop pest, were measured. Overall, we found that deficiency in JA production reduced plant development and were the least resistant against S. littoralis. Moreover, AM fungi increased plant resistance against S. littoralis, but such beneficial effect was more pronounced in JA-deficient plant than on JA over-accumulating plants. These results highlight that AM fungi-driven increased plant resistance is negatively affected by the ability of plants to produce JA and that AM fungi complement JA-mediated endogenous plant defenses in this system.

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Section: Effect Of Ja On Plant Functional Traitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mycorrhizal Fungi Enhance Resistance to Herbivores in Tomato Plants with Reduced Jasmonic Acid Production

Formenti

Rasmann

2019

Agronomy

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“…Survival under such circumstances requires a sophisticated, well-tuned defensive system that results in stress resistance or tolerance based on molecular processes that are orchestrated and controlled by plant hormones (Pieterse & Van Wees, 2015) and that allows the plant to cope with adverse situations. Besides their role in numerous biochemical processes regulating growth and development, plant hormones are also involved in signaling allowing a plant's innate immune system to maintain a basal level of resistance (Pieterse et al, 2014). Salicylic acid (SA) and jasmonic acid (JA) are considered as the main defense hormones.…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, plants adjust the sensitivity of their defense system upon triggering by specific natural or synthetic stimuli (Pieterse et al, 2014). When the more rapid and/or stronger defense reaction does not concomitantly induce metabolically costly defense mechanisms, the phenomenon is termed 'priming' (Martinez-Medina et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

The priming molecule β‐aminobutyric acid is naturally present in plants and is induced by stress

et al. 2016

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The defense system of a plant can be primed for increased defense, resulting in an augmented stress resistance and/or tolerance. Priming can be triggered by biotic and abiotic stimuli, as well as by chemicals such as β-aminobutyric acid (BABA), a nonprotein amino acid considered so far a xenobiotic. Since the perception mechanism of BABA has been recently identified in Arabidopsis thaliana, in the present study we explored the possibility that plants do synthesize BABA. After developing a reliable method to detect and quantify BABA in plant tissues, and unequivocally separate it from its two isomers α- and γ-aminobutyric acid, we measured BABA levels in stressed and nonstressed A. thaliana plants, and in different plant species. We show that BABA is a natural product of plants and that the endogenous levels of BABA increase rapidly after infection with necrotrophic, biotrophic and hemibiotrophic pathogens, as well as after salt stress and submergence. Our results place the rise in endogenous BABA levels to a point of convergence in plant stress response and provide biological significance to the presence of a receptor in plants. These findings can explain the extremely widespread efficacy of BABA and open the way to unravel the early steps of priming.

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“…Rapid, systemic and specific plant responses to herbivore feeding are governed by networks of hormones and other signals [ 4 ]. The plant hormones most commonly associated with inducible resistance are jasmonic acid (JA), salicylic acid (SA), and ethylene (ET) [ 6 ]. JA is a key regulator of responses to chewing herbivores and necrotrophic pathogens in plants but is also involved in the inhibition of seed germination and plant growth and promotes leaf senescence, fruit abscission, tuber formation, flower and fruit development, pigment formation, and tendril coiling [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Effectiveness of Potential Elicitors of Plant Resistance against Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in Four Crop Plants

Gordy¹,

Leonard

Blouin

et al. 2015

PLoS ONE

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Feeding by insect herbivores activates plant signaling pathways, resulting in the enhanced production of secondary metabolites and other resistance-related traits by injured plants. These traits can reduce insect fitness, deter feeding, and attract beneficial insects. Organic and inorganic chemicals applied as a foliar spray, seed treatment, or soil drench can activate these plant responses. Azelaic acid (AA), benzothiadiazole (BTH), gibberellic acid (GA), harpin, and jasmonic acid (JA) are thought to directly mediate plant responses to pathogens and herbivores or to mimic compounds that do. The effects of these potential elicitors on the induction of plant defenses were determined by measuring the weight gains of fall armyworm, Spodoptera frugiperda (J. E. Smith) (FAW) (Lepidoptera: Noctuidae) larvae on four crop plants, cotton, corn, rice, and soybean, treated with the compounds under greenhouse conditions. Treatment with JA consistently reduced growth of FAW reared on treated cotton and soybean. In contrast, FAW fed BTH- and harpin-treated cotton and soybean tissue gained more weight than those fed control leaf tissue, consistent with negative crosstalk between the salicylic acid and JA signaling pathways. No induction or inconsistent induction of resistance was observed in corn and rice. Follow-up experiments showed that the co-application of adjuvants with JA failed to increase the effectiveness of induction by JA and that soybean looper [Chrysodeixis includens (Walker)], a relative specialist on legumes, was less affected by JA-induced responses in soybean than was the polyphagous FAW. Overall, the results of these experiments demonstrate that the effectiveness of elicitors as a management tactic will depend strongly on the identities of the crop, the pest, and the elicitor involved.

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Signalling Networks Involved in Induced Resistance

Cited by 18 publications

References 196 publications

Mycorrhizal Fungi Enhance Resistance to Herbivores in Tomato Plants with Reduced Jasmonic Acid Production

Mycorrhizal Fungi Enhance Resistance to Herbivores in Tomato Plants with Reduced Jasmonic Acid Production

The priming molecule β‐aminobutyric acid is naturally present in plants and is induced by stress

Comparative Effectiveness of Potential Elicitors of Plant Resistance against Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in Four Crop Plants

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