Phytohormone participation during Citrus sinensis non-host response to Xanthomonas campestris pv. vesicatoria

Petrocelli, Silvana; Pizarro, María D.; Alet, Analía I.; Ollas, Carlos de; Talón, Manuel; Tadeo, Francisco R.; Gómez-Cádenas, Aurelio; Orellano, Elena G.; Daurelio, Lucas D.

doi:10.1016/j.plgene.2018.05.006

Cited by 8 publications

(15 citation statements)

References 58 publications

(76 reference statements)

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“…It has been shown that the SA signalling pathway plays a critical role in the regulation of NHR against X. citri in Arabidopsis (An and Mou, ). Likewise, ABA has emerged as a multifaceted modulator of the different layers of plant defences, and its role depends on the timing of recognition and the invasive strategy of the challenging pathogen (Asselbergh et al ., ; Lievens et al ., ; Petrocelli et al ., ; Ton et al ., ). These data prompted us to investigate, through the analysis of the expression of some key genes, whether SA and ABA signalling are also crucial in C. limon NHR against Xcc .…”

Section: Resultsmentioning

confidence: 98%

“…Therefore, the increased expression levels of cis‐miR393 in C. limon NHR to Xcc may also be associated with this repression of hormone signalling. In support of this hypothesis, in C. sinensis , the expression of genes involved in auxin biosynthesis and signalling pathways, including the auxin signalling F‐box receptor ( AFB2 ) gene, was down‐regulated during the NHR to Xcv (Petrocelli et al ., ). Moreover, the overexpression of miR393 increases resistance to Pseudomonas syringae pv.…”

Section: Discussionmentioning

confidence: 97%

“…Supporting this, in Arabidopsis, it has been suggested that pathogenic bacteria deliver effectors by the T3S system into host cells to suppress miRNA regulatory pathways (Padmanabhan et al ., ). Interestingly, several ABA‐related genes, including NCED3 , were found to be down‐regulated in C. sinensis NHR to Xcv , and this was also associated with a strong decrease in ABA levels at early times post‐inoculation (Petrocelli et al ., ). In Arabidopsis and rice, several reports have shown that ABA accumulation induced by bacterial pathogens promotes susceptibility via the suppression of the accumulation of phenolic compounds through phenylalanine ammonia‐lyase (PAL) inhibition, callose deposition and also SA‐mediated defences, contributing to symptom development (Gupta et al ., ; Lievens et al ., ; de Torres Zabala et al ., ; Xu et al ., ).…”

Section: Discussionmentioning

confidence: 97%

“…vesicatoria ( Xcv ) (Daurelio et al ., ), a pepper and tomato pathogen (Thieme et al ., ). Transcriptomic analysis indicates that this NHR modulates genes associated with biotic stress, cell death and plant hormone signalling (Daurelio et al ., , ; Petrocelli et al ., ). In contrast, the mechanistic basis of type I NHR in Citrus ssp.…”

Section: Introductionmentioning

confidence: 97%

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Plant responses underlying nonhost resistance of Citrus limon against Xanthomonas campestris pv. campestris

Chiesa

Roeschlin

Favaro

et al. 2018

Molecular Plant Pathology

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Summary Citrus is an economically important fruit crop that is severely afflicted by citrus canker, a disease caused by Xanthomonas citri ssp. citri (X. citri); thus, new sustainable strategies to manage this disease are needed. Although all Citrus spp. are susceptible to this pathogen, they are resistant to other Xanthomonas species, exhibiting non‐host resistance (NHR), for example, to the brassica pathogen X. campestris pv. campestris (Xcc) and a gene‐for‐gene host defence response (HDR) to the canker‐causing X. fuscans ssp. aurantifolii (Xfa) strain C. Here, we examine the plant factors associated with the NHR of C. limon to Xcc. We show that Xcc induced asymptomatic type I NHR, allowing the bacterium to survive in a stationary phase in the non‐host tissue. In C. limon, this NHR shared some similarities with HDR; both defence responses interfered with biofilm formation, and were associated with callose deposition, induction of the salicylic acid (SA) signalling pathway and the repression of abscisic acid (ABA) signalling. However, greater stomatal closure was seen during NHR than during HDR, together with different patterns of accumulation of reactive oxygen species and phenolic compounds and the expression of secondary metabolites. Overall, these differences, independent of Xcc type III effector proteins, could contribute to the higher protection elicited against canker development. We propose that Xcc may have the potential to steadily activate inducible defence responses. An understanding of these plant responses (and their triggers) may allow the development of a sustained and sustainable resistance to citrus canker.

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Section: Resultsmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

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Plant responses underlying nonhost resistance of Citrus limon against Xanthomonas campestris pv. campestris

Chiesa

Roeschlin

Favaro

et al. 2018

Molecular Plant Pathology

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“…Noteworthy, phylogenetic analysis showed that SPDS from citrus is presented as one locus only in comparison with two loci from A. thaliana [72]. On the other hand, AMD1, SPMS, TSS (also known as ACL5), NLP1, and AIH enzymes were identified in Citrus and presented a similar number of loci as those described in A. thaliana [72].…”

Section: Figurementioning

confidence: 84%

Citrus Polyamines: Structure, Biosynthesis, and Physiological Functions

Killiny

Nehela

2020

Plants

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Polyamines (PAs) are ubiquitous biogenic amines found in all living organisms from bacteria to Archaea, and Eukaryotes including plants and animals. Since the first description of putrescine conjugate, feruloyl-putrescine (originally called subaphylline), from grapefruit leaves and juice, many research studies have highlighted the importance of PAs in growth, development, and other physiological processes in citrus plants. PAs appear to be involved in a wide range of physiological processes in citrus plants; however, their exact roles are not fully understood. Accordingly, in the present review, we discuss the biosynthesis of PAs in citrus plants, with an emphasis on the recent advances in identifying and characterizing PAs-biosynthetic genes and other upstream regulatory genes involved in transcriptional regulation of PAs metabolism. In addition, we will discuss the recent metabolic, genetic, and molecular evidence illustrating the roles of PAs metabolism in citrus physiology including somatic embryogenesis; root system formation, morphology, and architecture; plant growth and shoot system architecture; inflorescence, flowering, and flowering-associated events; fruit set, development, and quality; stomatal closure and gas-exchange; and chlorophyll fluorescence and photosynthesis. We believe that the molecular and biochemical understanding of PAs metabolism and their physiological roles in citrus plants will help citrus breeding programs to enhance tolerance to biotic and abiotic stresses and provide bases for further research into potential applications.

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Polyamines and Their Crosstalk with Phytohormones in the Regulation of Plant Defense Responses

Asija

Seth

Umar

et al. 2022

J Plant Growth Regul

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Phytohormone participation during Citrus sinensis non-host response to Xanthomonas campestris pv. vesicatoria

Cited by 8 publications

References 58 publications

Plant responses underlying nonhost resistance of Citrus limon against Xanthomonas campestris pv. campestris

Plant responses underlying nonhost resistance of Citrus limon against Xanthomonas campestris pv. campestris

Citrus Polyamines: Structure, Biosynthesis, and Physiological Functions

Polyamines and Their Crosstalk with Phytohormones in the Regulation of Plant Defense Responses

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