Stress-Induced Phenylpropanoid Metabolism

Dixon, Richard A.; Paiva, Nancy L.

doi:10.2307/3870059

Cited by 2,022 publications

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“…Inceptin and OS also increased cinnamic acid levels, a product of L-phenylalanine ammonia-lyase and precursor to phenylpropanoid defenses induced by biotic attack (Fig. 4E) (24). Transcripts for cowpea protease inhibitor cystatin were also equally induced in the leaves by S. frugiperda OS and inceptin (Fig.…”

Section: Resultsmentioning

confidence: 81%

Fragments of ATP synthase mediate plant perception of insect attack

Schmelz

Carroll

LeClere

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

369

265

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Plants can perceive a wide range of biotic attackers and respond with targeted induced defenses. Specificity in plant non-selfrecognition occurs either directly by perception of pest-derived elicitors or indirectly through resistance protein recognition of host targets that are inappropriately proteolyzed. Indirect plant perception can occur during interactions with pathogens, yet evidence for analogous events mediating the detection of insect herbivores remains elusive. Here we report indirect perception of herbivory in cowpea (Vigna unguiculata) plants attacked by fall armyworm (Spodoptera frugiperda) larvae. We isolated and identified a disulfide-bridged peptide ( ؉ ICDINGVCVDA ؊ ), termed inceptin, from S. frugiperda larval oral secretions that promotes cowpea ethylene production at 1 fmol leaf ؊1 and triggers increases in the defenserelated phytohormones salicylic acid and jasmonic acid. Inceptins are proteolytic fragments of chloroplastic ATP synthase ␥-subunit regulatory regions that mediate plant perception of herbivory through the induction of volatile, phenylpropanoid, and protease inhibitor defenses. Only S. frugiperda larvae that previously ingested chloroplastic ATP synthase ␥-subunit proteins and produced inceptins significantly induced cowpea defenses after herbivory. Digestive fragments of an ancient and essential plant enzyme, inceptin functions as a potent indirect signal initiating specific plant responses to insect attack.elicitor ͉ guard hypothesis ͉ indirect perception ͉ insect herbivory ͉ plant defense A mechanistic understanding and targeted improvement of plant resistance traits are recognized as essential in combating yield losses from crop pests. Plants can perceive and defensively respond to attack either directly by impeding pest growth or indirectly by promoting advantageous interactions with beneficial organisms (1-7). Great progress has been made in the identification of plant receptor-like kinase families mediating perception of biotic attack and the subsequent activation of signal transduction cascades spanning interactions of GTP binding proteins, mitogen-activated protein kinases, phytohormones, transcription factors, and ultimately induced biochemical defenses (2,8). Despite these advances, relatively few candidate elicitors and ligands responsible for the initiation and specificity of induced plant defenses to pest attack have been identified (1, 2). This void is especially acute in the case of insect herbivore perception and is surprising given both the significance of plant-insect interactions in arthropod and angiosperm evolution and the role of insects in facilitating plant pathogen entry (9, 10).Induced plant defenses are initiated in part by the direct perception of elicitors derived from offending organisms. For example, maize (Zea mays) and tobacco (Nicotiana attenuata) perceive insect attack through the direct detection of fatty acid amino acid conjugate (FAC) elicitors present in insect oral secretions (OS). Plants respond with indirect defenses in the form of indu...

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Section: Resultsmentioning

confidence: 81%

Fragments of ATP synthase mediate plant perception of insect attack

Schmelz

Carroll

LeClere

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

369

265

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“…Plant secondary metabolites are closely tied to ecological functions and greatly affect community interactions (Dixon & Paiva, 1995; Moore, Andrew, Külheim, & Foley, 2014). Certain secondary metabolites may provide plants with specialized functions like deterrence to herbivory or infection (Harborne & Turner, 1984).…”

Section: Introductionmentioning

confidence: 99%

Discovering variation of secondary metabolite diversity and its relationship with disease resistance inCornus floridaL.

Pais

Xiang

2018

Ecology and Evolution

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Understanding intraspecific relationships between genetic and functional diversity is a major goal in the field of evolutionary biology and is important for conserving biodiversity. Linking intraspecific molecular patterns of plants to ecological pressures and trait variation remains difficult due to environment‐driven plasticity. Next‐generation sequencing, untargeted liquid chromatography–mass spectrometry (LC‐MS) profiling, and interdisciplinary approaches integrating population genomics, metabolomics, and community ecology permit novel strategies to tackle this problem. We analyzed six natural populations of the disease‐threatened Cornus florida L. from distinct ecological regions using genotype‐by‐sequencing markers and LC‐MS‐based untargeted metabolite profiling. We tested the hypothesis that higher genetic diversity in C. florida yielded higher chemical diversity and less disease susceptibility (screening hypothesis), and we also determined whether genetically similar subpopulations were similar in chemical composition. Most importantly, we identified metabolites that were associated with candidate loci or were predictive biomarkers of healthy or diseased plants after controlling for environment. Subpopulation clustering patterns based on genetic or chemical distances were largely congruent. While differences in genetic diversity were small among subpopulations, we did observe notable similarities in patterns between subpopulation averages of rarefied‐allelic and chemical richness. More specifically, we found that the most abundant compound of a correlated group of putative terpenoid glycosides and derivatives was correlated with tree health when considering chemodiversity. Random forest biomarker and genomewide association tests suggested that this putative iridoid glucoside and other closely associated chemical features were correlated to SNPs under selection.

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“…It is well known that PAL activity can be induced by both abiotic and biotic stresses [90], e.g. in response to wounding or pathogen attack, where synthesized phenolics could either act directly as defence compounds (phytoalexins) or indirectly, due to being precursors of lignin and suberin, producing a barrier and strengthening cell walls [91], which would prevent the infections through wounds by fungal pathogens and limit pathogen expansion in infected fruit.…”

Section: Mechanisms Of Improving Host Resistance Against Pathogensmentioning

confidence: 99%

Using jasmonates and salicylates to reduce losses within the fruit supply chain

Glowacz

Rees

2015

Eur Food Res Technol

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The fresh produce industry is constantly growing, due to increasing consumer demand. The shelf-life of some fruit, however, is relatively short, limited by microbial contamination or visual, textural and nutritional quality loss. Thus, techniques for reducing undesired microbial contamination, spoilage and decay, as well as maintaining product's visual, textural and nutritional quality are in high demand at all steps within the supply chain. The postharvest use of signalling molecules, i.e. jasmonates and salicylates seems to have unexplored potential. The focus of this review is on the effects of treatment with jasmonates and salicylates on the fresh produce quality, defined by decay incidence and severity, chilling injury, maintenance of texture, visual quality, taste and aroma, and nutritional content. Postharvest treatments with jasmonates and salicylates have the ability to reduce decay by increasing fruit resistance to diseases and reducing chilling injury in numerous products.These treatments also possess the ability to improve other quality characteristics, i.e. appearance, texture maintenance and nutritional content. Furthermore, they can easily be combined with other treatments, e.g. heat treatment, ultrasound treatment. A good understanding of all the benefits and limitations related to the postharvest use of jasmonates and salicylates is needed, and relevant information has been reviewed in this paper.

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Stress-Induced Phenylpropanoid Metabolism

Cited by 2,022 publications

References 0 publications

Fragments of ATP synthase mediate plant perception of insect attack

Fragments of ATP synthase mediate plant perception of insect attack

Discovering variation of secondary metabolite diversity and its relationship with disease resistance inCornus floridaL.

Using jasmonates and salicylates to reduce losses within the fruit supply chain

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