Different metabolic and genetic responses in citrus may explain relative susceptibility to<i>Tetranychus urticae</i>

Agut, Blas; Gamir, Jordi; Jacas, J. A.; Hurtado, Mónica A.; Flors, Vı́ctor

doi:10.1002/ps.3718

Cited by 68 publications

(152 citation statements)

References 54 publications

Supporting

Mentioning

132

Contrasting

Unclassified

Order By: Relevance

“…S2). Interestingly, the 392.109 m/z signal corresponds to alkaloids derived from the shikimate pathway previously identified in resistant sour orange plants after infestation with T. urticae (Agut et al ., ). According to these observations, in which the enhanced resistance of sour orange plants was determined, we performed a Venn diagram analysis of metabolites to identify metabolites in HIPV‐treated Cleopatra mandarin plants overlapping with basal defence metabolites in sour orange plants (Fig.…”

Section: Resultsmentioning

confidence: 97%

“…Tetranychus urticae is a polyphagous mite that feeds on many crops, such as tomato, citrus and cotton, and many ornamental plants (Bolland et al ., ). In a previous study (Agut et al ., ), we described the main basal resistance mechanisms of citrus to T. urticae . In the present study, we examined the role of citrus HIPVs in the direct and induced resistance against T. urticae .…”

Section: Discussionmentioning

confidence: 99%

“…Other tryptophan derivatives, such as DIMBOA in maize and wheat, and glucosinolates in Arabidopsis, act as toxic compounds for arthropods (Halkier & Gershenzon, 2006;Ahmad et al, 2011). The increased accumulation of the flavonoids hesperetin and naringenin enhances resistance against T. urticae in citrus, and these compounds are probably responsible for the observed decrease in mite performance (Agut et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tetranychus urticae‐triggered responses promote genotype‐dependent conspecific repellence or attractiveness in citrus

et al. 2015

Self Cite

View full text Add to dashboard Cite

SummaryThe citrus rootstocks sour orange and Cleopatra mandarin display differential resistance against Tetranychus urticae. Sour orange plants support reduced oviposition, growth rates and damage compared with Cleopatra mandarin plants. Jasmonic acid signalling and flavonoid accumulation have been revealed as key mechanisms for the enhanced resistance of sour orange plants.In this study, we observed that the release of T. urticae herbivore-induced plant volatiles (HIPVs) from sour orange plants has a marked repellent effect on conspecific mites associated with the production of the terpenes a-ocimene, a-farnesene, pinene and D-limonene, and the green leaf volatile 4-hydroxy-4-methyl-2-pentanone. By contrast, T. urticae HIPVs from Cleopatra mandarin plants promote conspecific mite attraction associated with an increase in (2-butoxyethoxy) ethanol, benzaldehyde and methyl salicylate levels.HIPVs released from sour orange plants following T. urticae infestation induce resistance in Cleopatra mandarin plants, thereby reducing oviposition rates and stimulating the oxylipin biosynthetic gene lipoxygenase2 (LOX2). Cleopatra HIPVs do not affect the response to T. urticae of these rootstocks.We conclude that sour orange plants promote herbivore-induced resistance in Cleopatra mandarin plants and, despite the weak basal resistance of these rootstocks, herbivore resistance can be induced through the combination of HIPVs, such as a-ocimene and D-limonene.

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tetranychus urticae‐triggered responses promote genotype‐dependent conspecific repellence or attractiveness in citrus

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…Particularly, this latter phenomenon is due to the production and release of VOCs. The synthesis and emission of VOCs is triggered by JA synthesis and mediates the attraction or rejection of beneficial and phytophagous species, respectively [10,36,38,39]. All the above-mentioned phytohormonal activity for indirect plant defense—which is induced by herbivores—culminates in the production and release of HIPVs [40].…”

Section: Discussionmentioning

confidence: 99%

Stage-Related Defense Response Induction in Tomato Plants by Nesidiocoris tenuis

Naselli

Urbaneja

Siscaro

et al. 2016

IJMS

View full text Add to dashboard Cite

The beneficial effects of direct predation by zoophytophagous biological control agents (BCAs), such as the mirid bug Nesidiocoris tenuis, are well-known. However, the benefits of zoophytophagous BCAs’ relation with host plants, via induction of plant defensive responses, have not been investigated until recently. To date, only the females of certain zoophytophagous BCAs have been demonstrated to induce defensive plant responses in tomato plants. The aim of this work was to determine whether nymphs, adult females, and adult males of N. tenuis are able to induce defense responses in tomato plants. Compared to undamaged tomato plants (i.e., not exposed to the mirid), plants on which young or mature nymphs, or adult males or females of N. tenuis fed and developed were less attractive to the whitefly Bemisia tabaci, but were more attractive to the parasitoid Encarsia formosa. Female-exposed plants were more repellent to B. tabaci and more attractive to E. formosa than were male-exposed plants. When comparing young- and mature-nymph-exposed plants, the same level of repellence was obtained for B. tabaci, but mature-nymph-exposed plants were more attractive to E. formosa. The repellent effect is attributed to the signaling pathway of abscisic acid, which is upregulated in N. tenuis-exposed plants, whereas the parasitoid attraction was attributed to the activation of the jasmonic acid signaling pathway. Our results demonstrate that all motile stages of N. tenuis can trigger defensive responses in tomato plants, although these responses may be slightly different depending on the stage considered.

show abstract

“…are often grafted in www.efsa.europa.eu/efsajournalcommercial orchards and rootstock. Such a practice can significantly modify the susceptibility of the grafted cultivar to the aboveground pest (Bruessow et al, 2010;Agut et al, 2014Agut et al, , 2016, including X. citri pv. citri, for which a higher disease severity was observed for rootstock associations conferring a higher tree vigour (Agostini et al, 1985).…”

Section: Uncertaintiesmentioning

confidence: 99%

Citrus junos as a host of citrus bacterial canker

Jeger¹,

Caffier²,

Candresse³

et al. 2017

EFS2

View full text Add to dashboard Cite

Following a request from the European Commission, the European Food Safety Authority (EFSA) Plant Health (PLH) Panel analysed a dossier submitted by the Japanese authorities in order to clarify the host status of Citrus junos with regard to Xanthomonas citri pv. citri and Xanthomonas citri pv. aurantifolii, causal agents of citrus bacterial canker, and to indicate whether C. junos fruit could represent a pathway for the introduction of citrus bacterial canker into the European Union. In a previous opinion in the year 2014, the EFSA PLH Panel concluded that commercial fresh citrus fruit is generally pathway and that no commercially important Citrus species or variety can be considered as immune to citrus bacterial canker. In the current assessment, the EFSA PLH Panel analysed the two scientific papers provided by the Japanese authorities, as well as 16 additional papers identified through a systematic literature review. The PLH Panel considered that the conclusions of its previous opinion remain valid and that convergent lines of evidence provide sufficient demonstration that C. junos is a host of X. citri pv. citri and X. citri pv. aurantifolii. Therefore, there is no reason to consider the C. junos fruit differently from other citrus species. Consequently, the assessment of the general citrus fruit pathway from the 2014 opinion still applies. Uncertainties on these conclusions are a result of the scarce scientific evidence published on this subject in addition to the methodological and reporting limitations of the published papers.

show abstract

Different metabolic and genetic responses in citrus may explain relative susceptibility toTetranychus urticae

Cited by 68 publications

References 54 publications

Tetranychus urticae‐triggered responses promote genotype‐dependent conspecific repellence or attractiveness in citrus

Tetranychus urticae‐triggered responses promote genotype‐dependent conspecific repellence or attractiveness in citrus

Stage-Related Defense Response Induction in Tomato Plants by Nesidiocoris tenuis

Citrus junos as a host of citrus bacterial canker

Contact Info

Product

Resources

About