Chemical Priming of Plants Against Multiple Abiotic Stresses: Mission Possible?

Savvides, Andreas; Ali, Shawkat; Tester, Mark; Fotopoulos, Vasileios

doi:10.1016/j.tplants.2015.11.003

Cited by 518 publications

(327 citation statements)

References 99 publications

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“…For example, environmentally-observed soil residual levels of glyphosate (1.8 μM), AMPA (2.7 μM) or hydroxyatrazine (760 nM) activate the transcription of the gene encoding ABA degrading enzyme ABA 8′-hydroxylase , whose activity controls ABA levels and tolerance to drought and salinity stress (Horn et al, 2013). Finally, the effects of safener and chemical primer treatments (Borges et al, 2014;Riechers et al, 2010;Savvides et al, 2015) demonstrate that xenobiotic signaling effects can be effective in the field and in the environment.…”

Section: Involvement Of Herbicide-related Signaling In the Environmenmentioning

confidence: 99%

“…It thus seems that, under certain types of conditions, low subtoxic or non-toxic levels of herbicides, of herbicide metabolites, or of other pesticides can also promote mechanisms of growth (Belz and Duke, 2014;Serra et al, 2015a;Velini et al, 2008) or stress defence (Serra et al, , 2015aStamm et al, 2014) that could be adaptive for additional conditions of stress, such as drought or oxidative stress, and provide a mechanism of chemical priming against abiotic stress (Savvides et al, 2015). Conversely, Zhou et al (2015) have suggested that knowledge on interactions between herbicide and endogenous signaling pathways in plants (as described in Fig.…”

Section: Involvement Of Herbicide-related Signaling In the Environmenmentioning

confidence: 99%

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Herbicide-related signaling in plants reveals novel insights for herbicide use strategies, environmental risk assessment and global change assessment challenges

Alberto

Serra

Sulmon

et al. 2016

Science of The Total Environment

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Section: Involvement Of Herbicide-related Signaling In the Environmenmentioning

confidence: 99%

Section: Involvement Of Herbicide-related Signaling In the Environmenmentioning

confidence: 99%

Herbicide-related signaling in plants reveals novel insights for herbicide use strategies, environmental risk assessment and global change assessment challenges

Alberto

Serra

Sulmon

et al. 2016

Science of The Total Environment

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“…Seed priming with chemical agents such as sodium nitroxide, hydrogen peroxide, sodium hydrosulphide, melatonin, polyamines and polyethylene glycol (PEG) or biological agents such as bacterial suspensions improves plants tolerance to diferent abiotic stresses by improving cellular homeostasis and plant growth [74]. The most commonly used priming agents share the same modes of action, especially under stressful conditions.…”

Section: Seed Osmopriming and Drought Tolerance In Alfalfamentioning

confidence: 99%

“…The most commonly used priming agents share the same modes of action, especially under stressful conditions. Moreover, when used against diferent abiotic constraints, their modes of action exhibit similarities, but also distinct speciicities and their performance mainly depend on concentration of the priming agent, priming period and temperature [74].…”

Section: Seed Osmopriming and Drought Tolerance In Alfalfamentioning

confidence: 99%

Alfalfa and Its Symbiosis Responses to Osmotic Stress

Mouradi¹,

Farissi²,

Bouizgaren³

et al. 2018

New Perspectives in Forage Crops

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Alfalfa (Medicago sativa L.) is one of the most cultivated forage legumes in Morocco thanks to its great adaptation to the climatic conditions of this country, its high protein content and its ability to ix atmospheric nitrogen in symbiosis with rhizobia. Environmental stresses such as drought and salinity constitute a major factor limiting the symbiotic nitrogen ixation and legume productivity. In the last decades, this process has interested scholars in understanding the implication of these strains in legume stress tolerance in order to make these symbioses more eicient under diicult conditions. Seed osmopriming is a great technique in the amelioration of seed germination and seedlings growth in responses to several abiotic stress conditions. In this chapter, the efects of water deicit on the Moroccan alfalfa populations and their symbiotic association with rhizobia were discussed. Besides, osmopriming could make these symbioses more eicient especially under stress conditions.

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“…A number of antibiotics and pathogenesis-related proteins targeted against secondary infection are expressed more strongly and rapidly. This general phenomenon is called priming (1); priming induced by and against pathogens is called systemic acquired resistance (SAR) (2). SAR was discovered decades ago (3,4) and has the potential to confer on crops enhanced resistance against diverse pathogens; for this reason, induction of SAR using chemical and biological agents has been explored.…”

mentioning

confidence: 99%

rgs-CaM Detects and Counteracts Viral RNA Silencing Suppressors in Plant Immune Priming

Jeon

Tadamura

Murakami

et al. 2017

J Virol

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Primary infection of a plant with a pathogen that causes high accumulation of salicylic acid in the plant typically via a hypersensitive response confers enhanced resistance against secondary infection with a broad spectrum of pathogens, including viruses. This phenomenon is called systemic acquired resistance (SAR), which is a plant priming for adaption to repeated biotic stress. However, the molecular mechanisms of SAR-mediated enhanced inhibition, especially of virus infection, remain unclear. Here, we show that SAR against cucumber mosaic virus (CMV) in tobacco plants (Nicotiana tabacum) involves a calmodulin-like protein, rgs-CaM. We previously reported the antiviral function of rgs-CaM, which binds to and directs degradation of viral RNA silencing suppressors (RSSs), including CMV 2b, via autophagy. We found that rgs-CaM-mediated immunity is ineffective against CMV infection in normally growing tobacco plants but is activated as a result of SAR induction via salicylic acid signaling. We then analyzed the effect of overexpression of rgsCaM on salicylic acid signaling. Overexpressed and ectopically expressed rgs-CaM induced defense reactions, including cell death, generation of reactive oxygen species, and salicylic acid signaling. Further analysis using a combination of the salicylic acid analogue benzo-(1,2,3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH) and the Ca 2ϩ ionophore A23187 revealed that rgs-CaM functions as an immune receptor that induces salicylic acid signaling by simultaneously perceiving both viral RSS and Ca 2ϩ influx as infection cues, implying its autoactivation. Thus, secondary infection of SAR-induced tobacco plants with CMV seems to be effectively inhibited through 2b recognition and degradation by rgs-CaM, leading to reinforcement of antiviral RNA silencing and other salicylic acid-mediated antiviral responses.IMPORTANCE Even without an acquired immune system like that in vertebrates, plants show enhanced whole-plant resistance against secondary infection with pathogens; this so-called systemic acquired resistance (SAR) has been known for more than half a century and continues to be extensively studied. SAR-induced plants strongly and rapidly express a number of antibiotics and pathogenesis-related proteins targeted against secondary infection, which can account for enhanced resistance against bacterial and fungal pathogens but are not thought to control viral infection. This study showed that enhanced resistance against cucumber mosaic virus is caused by a tobacco calmodulin-like protein, rgs-CaM, which detects and counteracts the major viral virulence factor (RNA silencing suppressor) after SAR induction. rgs-CaM-mediated SAR illustrates the growth versus defense trade-off in plants, as it targets the major virulence factor only under specific biotic stress conditions, thus avoiding the cost of constitutive activation while reducing the damage from virus infection.

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Chemical Priming of Plants Against Multiple Abiotic Stresses: Mission Possible?

Cited by 518 publications

References 99 publications

Herbicide-related signaling in plants reveals novel insights for herbicide use strategies, environmental risk assessment and global change assessment challenges

Herbicide-related signaling in plants reveals novel insights for herbicide use strategies, environmental risk assessment and global change assessment challenges

Alfalfa and Its Symbiosis Responses to Osmotic Stress

rgs-CaM Detects and Counteracts Viral RNA Silencing Suppressors in Plant Immune Priming

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