Insights into the role of jasmonic acid-mediated defenses against necrotrophic and biotrophic fungal pathogens

Antico, Christopher J.; Colon, Chad; Banks, Taylor A.; Ramonell, Katrina M.

doi:10.1007/s11515-011-1171-1

Cited by 133 publications

(78 citation statements)

References 72 publications

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“…jar1 plants have reduced sensitivity to root growth inhibition in the presence of exogenous JA ( Staswick et al, 2002). jar1 was shown to be susceptible to soil oomycete (Staswick et al, 1998) and necrotrophic pathogens (Antico et al, 2012). In wounding JAR1 transcript was found increased dramatically in wounded tissue and JA-Ile accumulated mostly near the wound site with a minor increase in unwounded tissue (Suza and Staswick, 2008).…”

Section: Ja-amino Acid Synthetase (Jar1)mentioning

confidence: 99%

Jasmonate Biosynthesis, Perception and Function in Plant Development and Stress Responses

Yan¹,

Borrego²,

Kolomiets³

2013

Lipid Metabolism

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Section: Ja-amino Acid Synthetase (Jar1)mentioning

confidence: 99%

Jasmonate Biosynthesis, Perception and Function in Plant Development and Stress Responses

Yan¹,

Borrego²,

Kolomiets³

2013

Lipid Metabolism

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“…The SA pathway is primarily activated in response to biotrophic pathogens, while the JA/ET pathways are induced in response to necrotrophic pathogens and in response to wounding and tissue-damaging by insect feeding [7], [8], although recent evidence suggests that JA can also play a role in resistance against specific types of biotrophic fungi [9]. The SA pathway regulates the expression of a wide array of defense-responses including the Pathogenensis-related protein (PR) coding genes [10].…”

Section: Introductionmentioning

confidence: 99%

Activation of the Phenylpropanoid Pathway in Nicotiana tabacum Improves the Performance of the Whitefly Bemisia tabaci via Reduced Jasmonate Signaling

et al. 2013

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BackgroundPhloem-feeding insects can manipulate plant-induced resistance and are able to suppress effective jasmonic acid/ethylene (JA/ET) defenses by the induction of inefficient salicylic acid (SA) based responses. As a result, activation of the phenylpropanoid biosynthesis pathway in transgenic plants is anticipated to cause complex interactions between phloem-feeding insects and their host plants due to predicted contradiction between two defense forces: the toxicity of various phenylpropanoids and the accumulation of SA via a branch of the activated pathway.Methodology/Principal FindingsHere, we investigated the effect of activating the phenylpropanoids pathway in Nicotiana tabacum, by over-expression of the PAP1 transcription factor, on the whitefly Bemisia tabaci, a phloem-feeding insect model. Our performance assays indicated that the over-expression made the transgenic plants a more suitable host for B. tabaci than wild-type (WT) plants, although these plants accumulated significantly higher levels of flavonoids. Transcription analyses of indicator genes in the SA (PR1a) and JA/ET (ERF1, COI1 and AOC) pathways followed by quantification of the SA and JA hormone levels, indicated that B. tabaci infestation periods longer than 8 hours, caused higher levels of activity of SA signaling in transgenic plants and higher levels of JA/ET signaling in WT plants.Conclusions/SignificanceTaken together, these results emphasize the important role JA/ET-induced defenses play in protecting plants from successful infestation by B. tabaci and likely other phloem-feeding insects. It also indicates the necessity of phloem feeders to suppress these defenses for efficient utilization of plant hosts. Our data also indicate that the defensive chemistry produced by the phenylpropanoids pathway has only a minor effect on the insect fitness.

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“…The activation of the JA-signaling pathway is essential for resistance against necrotrophic pathogens (Antico et al 2012), such as those used in this study. P. syringae pv.…”

mentioning

confidence: 99%

Silencing of <i>Nicotiana benthamiana</i> SEC14 phospholipid transfer protein reduced jasmonic acid dependent defense against <i>Pseudomonas syringae</i>

Kiba

Imanaka

Nakano

et al. 2016

Plant Biotechnology

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We previously identified SEC14, phospholipid transfer protein superfamily gene, in Nicotiana benthamiana (NbSEC14) that was closely related to phospholipid signaling as well as jasmonic acid-dependent defense responses during plant immune responses against Ralstonia solanacearum. To examine effect of NbSEC14-silencing on basal plant defenses, we used two other bacterial pathogens with different virulent strategies, Pseudomonas syringae pv. tabaci and pv. mellea. NbSEC14-silenced plants showed accelerated growth of P. syringae pv. tabaci and pv. mellea, and formation of necrotic lesions. Induction of JA-related PR-4 gene was compromised in NbSEC14-silenced plants, which was supported by reduced jasmonic acid levels in NbSEC14-silenced plants. These results suggested that NbSEC14 might be regulating plant basal resistance against plant pathogenic Pseudomonads via jasmonic acid-dependent signaling pathway.

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Insights into the role of jasmonic acid-mediated defenses against necrotrophic and biotrophic fungal pathogens

Cited by 133 publications

References 72 publications

Jasmonate Biosynthesis, Perception and Function in Plant Development and Stress Responses

Jasmonate Biosynthesis, Perception and Function in Plant Development and Stress Responses

Activation of the Phenylpropanoid Pathway in Nicotiana tabacum Improves the Performance of the Whitefly Bemisia tabaci via Reduced Jasmonate Signaling

Silencing of <i>Nicotiana benthamiana</i> SEC14 phospholipid transfer protein reduced jasmonic acid dependent defense against <i>Pseudomonas syringae</i>

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