The NPR1-dependent salicylic acid signalling pathway is pivotal for enhanced salt and oxidative stress tolerance in Arabidopsis

Jayakannan, Maheswari; Bose, Jayakumar; Babourina, Olga; Shabala, Sergey; Massart, Amandine; Poschenrieder, Charlotte; Rengel, Zed

doi:10.1093/jxb/eru528

Cited by 119 publications

(89 citation statements)

References 50 publications

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“…), salicylic acid and ethylene in tuning ion uptake, antioxidant defense and concomitant gene expression (Jayakannan et al . ; Zhang et al . ) are other examples highlighting the important roles of hormones in shaping the plant response to salinity.…”

Section: Signaling and Contribution Of Plant Hormonesmentioning

confidence: 99%

Salinity and crop yield

2018

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Thirty crop species provide 90% of our food, most of which display severe yield losses under moderate salinity. Securing and augmenting agricultural yield in times of global warming and population increase is urgent and should, aside from ameliorating saline soils, include attempts to increase crop plant salt tolerance. This short review provides an overview of the processes that limit growth and yield in saline conditions. Yield is reduced if soil salinity surpasses crop-specific thresholds, with cotton, barley and sugar beet being highly tolerant, while sweet potato, wheat and maize display high sensitivity. Apart from Na , also Cl , Mg , SO or HCO contribute to salt toxicity. The inhibition of biochemical or physiological processes cause imbalance in metabolism and cell signalling and enhance the production of reactive oxygen species interfering with cell redox and energy state. Plant development and root patterning is disturbed, and this response depends on redox and reactive oxygen species signalling, calcium and plant hormones. The interlink of the physiological understanding of tolerance processes from molecular processes as well as the agronomical techniques for stabilizing growth and yield and their interlinks might help improving our crops for future demand and will provide improvement for cultivating crops in saline environment.

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Section: Signaling and Contribution Of Plant Hormonesmentioning

confidence: 99%

Salinity and crop yield

2018

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“…It has been revealed that salicylic acid signaling enhances salt and oxidative stress tolerance in Arabidopsis by the induction of the NONEXPRESSER OF PATHOGENESIS RELATED1 (NPR1) gene (Jayakannan et al, 2015). Upon pathogen infection, ethylene is known to enhance salicylic acid/NPR1-dependent defenses through the ethylene signaling and response pathway (Leon-Reyes et al, 2009).…”

Section: Other Hormonesmentioning

confidence: 99%

“…Several plant hormones, such as ethylene (Zhao and Schaller, 2004;Cheng et al, 2013), abscisic acid (ABA; Wu et al, 2007), jasmonates (Cela et al, 2011;Cheng et al, 2013), salicylic acid (Jayakannan et al, 2015), GAs (Magome et al, 2008), cytokinins , auxin (He et al, 2005), and brassinosteroids (Divi et al, 2010), have been reported to be involved in stress signaling. Despite its simple two-carbon structure, the plant hormone ethylene serves as a key mediator of biotic and abiotic stress factors.…”

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confidence: 99%

Ethylene Response Factors: A Key Regulatory Hub in Hormone and Stress Signaling

2015

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ORCID IDs: 0000-0001-7494-6841 (M.M.); 0000-0001-6523-6848 (S.M.-B.).Ethylene is essential for many developmental processes and a key mediator of biotic and abiotic stress responses in plants. The ethylene signaling and response pathway includes Ethylene Response Factors (ERFs), which belong to the transcription factor family APETALA2/ERF. It is well known that ERFs regulate molecular response to pathogen attack by binding to sequences containing AGCCGCC motifs (the GCC box), a cis-acting element. However, recent studies suggest that several ERFs also bind to dehydration-responsive elements and act as a key regulatory hub in plant responses to abiotic stresses. Here, we review some of the recent advances in our understanding of the ethylene signaling and response pathway, with emphasis on ERFs and their role in hormone cross talk and redox signaling under abiotic stresses. We conclude that ERFs act as a key regulatory hub, integrating ethylene, abscisic acid, jasmonate, and redox signaling in the plant response to a number of abiotic stresses.

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“…In general, salt-stress treatment induced an increase in the concentration of both free-and bound-phenolic fractions in sprouts extracts of TDiZ, although the differences were not always significant (Table 3). The contribution to total bound-PAs increase is also attributable to SA, which showed the highest values in 50_S treatment (Table 3) and which could act as a signaling molecule inducing salt tolerance in plants (Jayakannan et al, 2015).…”

Section: Genotypesmentioning

confidence: 99%

Effects of sprouting and salt stress on polyphenol composition and antiradical activity of einkorn, emmer and durum wheat

et al. 2017

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Germination is related with improvements of nutritional value of seeds, since it promotes accumulation of health-promoting phytochemicals. However, only few studies have investigated on phytochemicals accumulation during sprouting under sub-optimal conditions. Thus, we investigated the effect of salinity during germination of an einkorn (TMoM), an emmer (TDiZ) and a durum wheat (TDuC) genotype on the total polyphenols (TPC), free-and bound-phenolic acids [PAs; i.e. caffeic acid, syringic acid, Pcoumaric acid, trans-ferulic acid, and salicylic acid] contents and antiradical activity (Trolox equivalent antioxidant capacity; TEAC) of sprouts and wheatgrass. The following NaCl treatments were applied: 0 (control), 25, 50 and 100 mM NaCl concentration throughout the whole experiment, or 50 and 100 mM NaCl until sprout stage and then 0 mM until wheatgrass stage (recovery treatments). TMoM showed higher total bound-PAs both in sprouts and wheatgrass with respect to the other Triticum genotypes (+25% and 24%, respectively) as well as of total bound-PAs and bound-SA in the recovery treatments. Moderate salt stress significantly increased all the investigated variables in TDiZ. Salt stress induced higher TPC and TEAC as well as total free-PAs values till 50 mM NaCl in TDuC, whilst significantly lowered total boundPAs due to the negative variation of both P-CA (-84%) and trans-FA (-81%) acids. Results indicate that salinity during germination could be efficiently modulated to improve the nutritional quality of sprouts, wheatgrass and cereal-based products.

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The NPR1-dependent salicylic acid signalling pathway is pivotal for enhanced salt and oxidative stress tolerance in Arabidopsis

Abstract: SummaryNPR1-dependent salicylic acid signalling controls sodium entry into the roots while preventing potassium loss through depolarization-activated outward-rectifying potassium and ROS-activated non-selective cation channels during salt and oxidative stresses.

Cited by 119 publications

References 50 publications

Salinity and crop yield

Salinity and crop yield

Ethylene Response Factors: A Key Regulatory Hub in Hormone and Stress Signaling

Effects of sprouting and salt stress on polyphenol composition and antiradical activity of einkorn, emmer and durum wheat

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