NO, hydrogen sulfide does not come first during tomato response to high salinity

da-Silva, Cristiane Jovelina; Mollica, Débora C.F.; Vicente, Mateus Henrique; Peres, Lázaro Eustáquio Pereira; Modolo, Luzia V.

doi:10.1016/j.niox.2017.09.008

Cited by 68 publications

(24 citation statements)

References 36 publications

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“…This might lead to a mechanism in which NO could also directly inactivate the autophagic process. Moreover, NO was shown to induce the expression of genes encoding hydrogen sulfide (H 2 S)-synthesizing enzymes in tomato plants [131] resulting in higher levels of H 2 S, which inhibits autophagy by an unknown mechanism [132]. This effect of NO would be less relevant when SnRK1 is more active because SnRK1 was shown to phosphorylate nitrate reductase (NR), inactivating its activity and thus reducing NO production [133].…”

Section: Ros Levelsmentioning

confidence: 99%

Linking Autophagy to Abiotic and Biotic Stress Responses

Signorelli

Tarkowski

Ende

et al. 2019

Trends in Plant Science

235

176

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Autophagy is a process in which cellular components are delivered to lytic vacuoles to be recycled and has been demonstrated to promote abiotic/biotic stress tolerance. Here, we review how the responses triggered by stress conditions can affect autophagy and its signaling pathways. Besides the role of SNF-related kinase 1 (SnRK1) and TOR kinases in the regulation of autophagy, abscisic acid (ABA) and its signaling kinase SnRK2 have emerged as key players in the induction of autophagy under stress conditions. Furthermore, an interplay between reactive oxygen species (ROS) and autophagy is observed, ROS being able to induce autophagy and autophagy able to reduce ROS production. We also highlight the importance of osmotic adjustment for the successful performance of autophagy and discuss the potential role of GABA in plant survival and ethylene (ET)-induced autophagy.

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Section: Ros Levelsmentioning

confidence: 99%

Linking Autophagy to Abiotic and Biotic Stress Responses

Signorelli

Tarkowski

Ende

et al. 2019

Trends in Plant Science

235

176

View full text Add to dashboard Cite

show abstract

“…Recently, increasing evidence has demonstrated that H 2 S possesses multiple physiological functions during the development of both animals and plants 19,20 . In tomato, limited studies have shown that H 2 S is involved in the auxin-or methane-induced lateral root formation 21,22 , the modulation of fruit ripening via increasing antioxidant activity 23 , and the alleviation of stress caused by salt or excess nitrate through altering the redox status of the stressed plants 24,25 .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen sulfide inhibits ethylene-induced petiole abscission in tomato (Solanum lycopersicum L.)

Liu

et al. 2020

Hortic Res

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Abscission is a dynamic physiological process that is ubiquitous in plants and can also be an essential agronomic trait in crops, thus attracting attention from plant growers and breeders. In general, the process of plant organ abscission can be divided into four steps, among which the step to obtain the competence to respond to abscission signals (step 2) is the most complex; however, the molecular mechanism underlying this process remains unclear. In this study, we found that hydrogen sulfide (H 2 S) inhibited the abscission of the tomato petiole in a dose-dependent manner, and the abscission of the petiole was accelerated when an H 2 S scavenger was applied. Further enzymatic activity and gene expression analyses showed that H 2 S suppressed the activity of enzymes capable of modifying the cell wall by inhibiting the usual upregulation of the transcription of the corresponding genes during the abscission process but not by affecting the activities of these enzymes by direct posttranslational modification. H 2 S treatment upregulated the expression levels of SlIAA3 and SlIAA4 but downregulated the transcription of ILR-L3 and ILR-L4 in the earlier stages of the abscission process, indicating that H 2 S probably functioned in the second step of the abscission process by preventing the abscission zone cells from obtaining the competence to respond to abscission signals by modulating the content of the bioactive-free auxin in these cells. Moreover, similar H 2 S inhibitory effects were also demonstrated in the process of floral organ abscission and anther dehiscence in other plant species, suggesting a ubiquitous role for H 2 S in cell separation processes.

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“…Salt stress occurring during early grain development causes yield loss in crops like rice (Paul and Roychoudhury ). Earlier reports have shown that H 2 S and NO enhance osmotic stress tolerance and promote seedling growth under salt stress in several plant species (Uchida et al , Wang et al , , Christou et al , Chen et al , Da‐Silva and Modolo , Adamu et al , Da‐Silva et al ). The application of the H 2 S donor, NaHS increased the seed germination rate and improved seedling growth of alfalfa ( Medicago sativa ) by alleviating oxidative damage through increased expression of genes encoding antioxidative enzymes (Wang et al ).…”

Section: Functional Cross‐talk Of H2s and No Systems Under Multiple Amentioning

confidence: 98%

“…In oxidative stress‐responsive signaling, the exact placement of H 2 S with respect to other effectors is a crucial concern. This was investigated in salt‐stressed tomato plants by Da‐Silva et al () and it was found that NO functions upstream of H 2 S and ameliorates oxidative stress, thus contributing to stress tolerance. Li et al (, b) reported that H 2 S functions not only downstream of NO signaling, but also acts downstream of salicylic acid‐induced heat tolerance signaling pathways (Li et al ).…”

Section: Interplay Between H2s and No Signaling Pathwaysmentioning

confidence: 99%

“…Oxidative damage caused by NaCl‐mediated stress could also be overcome in tomato plants, by treating with H 2 S and NO and in a stress‐responsive signaling cascade where H 2 S acts downstream of NO. This induction of the antioxidative enzyme pathway allowed resistance to salt stress (Da‐Silva and Modolo , Da‐Silva et al ). Fan et al () reported that exogenous application of NO enhanced NaCl stress tolerance by increasing the activity of SOD, peroxidase, CAT and APX, and the contents of photosynthetic pigments and proline in cucumber seedlings.…”

Section: Functional Cross‐talk Of H2s and No Systems Under Multiple Amentioning

confidence: 99%

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Regulation of physiological aspects in plants by hydrogen sulfide and nitric oxide under challenging environment

Paul

Roychoudhury

2019

Physiologia Plantarum

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Plants are exposed to a plethora of abiotic stresses such as drought, salinity, heavy metal and temperature stresses at different stages of their life cycle, from germination to seedling till the reproductive phase. As protective mechanisms, plants release signaling molecules that initiate a cascade of stress‐signaling events, leading either to programmed cell death or plant acclimation. Hydrogen sulfide (H2S) and nitric oxide (NO) are considered as new ‘gasotransmitter’ molecules that play key roles in regulating gene expression, posttranslational modification (PTM), as well as cross‐talk with other hormones. Although the exact role of NO in plants remains unclear and is species dependent, various studies have suggested a positive correlation between NO accumulation and environmental stress in plants. These molecules are also involved in a large array of stress responses and act synergistically or antagonistically as signaling components, depending on their respective concentration. This study provides a comprehensive update on the signaling interplay between H2S and NO in the regulation of various physiological processes under multiple abiotic stresses, modes of action and effects of exogenous application of these two molecules under drought, salt, heat and heavy metal stresses. However, the complete picture of the signaling cascades mediated by H2S and NO is still elusive. Recent researches indicate that during certain plant processes, such as stomatal closure, H2S could act upstream of NO signaling or downstream of NO in response to abiotic stresses by improving antioxidant activity in most plant species. In addition, PTMs of antioxidative pathways by these two molecules are also discussed.

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NO, hydrogen sulfide does not come first during tomato response to high salinity

Cited by 68 publications

References 36 publications

Linking Autophagy to Abiotic and Biotic Stress Responses

Linking Autophagy to Abiotic and Biotic Stress Responses

Hydrogen sulfide inhibits ethylene-induced petiole abscission in tomato (Solanum lycopersicum L.)

Regulation of physiological aspects in plants by hydrogen sulfide and nitric oxide under challenging environment

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