Hydrogen Sulfide: A Novel Gaseous Molecule for Plant Adaptation to Stress

Aim.The aim of the work described herein was to study the dynamics of allantoin accumulation in the underground phytomass ofEchium vulgareL.,Symphytum caucasicumM. Bieb. andS. asperumLepech. as well as to clarify the role of allantoin in plant adaptation to stress factors.Methods.We studied the roots of plants growing in the foothill (Nalchik, 490–512 m above sea level) and the mountain zones of the Kabardino-Balkarian Republic (Terskol village, 2530 m above sea level; Verkhnyaya Balkaria village, 2680 m above sea level). The roots were collected at the stages of rosetting, flowering, fruiting and at the end of the growing season. Aqueous-alcoholic extracts of shredded roots were analyzed by high-performance liquid chromatography.Results.The highest content of allantoin in the roots ofEchium vulgare,Symphytum caucasicum,S. asperumplants was noted at the end of the growing season, respectively 0.915; 0.342–0.658; 2,842–3,426%. Under conditions of low temperatures and increased solar radiation, the content of allantoin in the roots increases 1.2–1.9 times as compared with the plants of the foothill zone.Conclusion.Allantoin plays an important role in the process of adapting species of the family Boraginaceae to oxidative stress caused by hypothermia and increased solar radiation.

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Influence of biostimulant and substrate volume on root growth and development of scarlet sage (Salvia splendens L.) transplants

Journal of Agricultural Sciences Belgrade ◽

10.2298/jas1001029z ◽

2010 ◽

Vol 55 (1) ◽

pp. 29-36 ◽

Cited By ~ 5

Author(s):

Svjetlana Zeljkovic ◽

Nada Paradjikovic ◽

Tamara Babic ◽

Gordana Djuric ◽

Rodoljub Oljaca ◽

...

Keyword(s):

Root Growth ◽

Growth And Development ◽

Untreated Control ◽

Dry Mass ◽

Adaptation To Stress ◽

Plant Adaptation ◽

Salvia Splendens ◽

Fresh And Dry Mass ◽

Root Growth And Development

The influence of biostimulant and substrate volume on scarlet sage transplants growth and development was examined in this investigation. There was one cultivar of scarlet sage used in trial which was transplanted in pots of two different volumes. Plants were treated with biostimulant (Radifarm) in concentration of 0.25% or left untreated (control). During the trial, root and aboveground fresh and dry mass were recorded. Treatment with biostimulant and bigger substrate volume showed good results by increasing investigated parameters. Investigation shows how biostimulant application to scarlet sage transplants production improves growth and development of root and aboveground mass which is important for faster plant adaptation to stress during transplanting.

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Do nitric oxide, carbon monoxide and hydrogen sulfide really qualify as ‘gasotransmitters’ in bacteria?

Biochemical Society Transactions ◽

10.1042/bst20170311 ◽

2018 ◽

Vol 46 (5) ◽

pp. 1107-1118 ◽

Cited By ~ 15

Author(s):

Lauren K. Wareham ◽

Hannah M. Southam ◽

Robert K. Poole

Keyword(s):

Nitric Oxide ◽

Carbon Monoxide ◽

Hydrogen Sulfide ◽

Small Molecule ◽

Toxic Effects ◽

Gaseous Molecule ◽

Recent Advances ◽

Definition Of

A gasotransmitter is defined as a small, generally reactive, gaseous molecule that, in solution, is generated endogenously in an organism and exerts important signalling roles. It is noteworthy that these molecules are also toxic and antimicrobial. We ask: is this definition of a gasotransmitter appropriate in the cases of nitric oxide, carbon monoxide and hydrogen sulfide (H2S) in microbes? Recent advances show that, not only do bacteria synthesise each of these gases, but the molecules also have important signalling or messenger roles in addition to their toxic effects. However, strict application of the criteria proposed for a gasotransmitter leads us to conclude that the term ‘small molecule signalling agent’, as proposed by Fukuto and others, is preferable terminology.

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Hydrogen sulfide-mediated regulation of cell death signaling ameliorates adverse cardiac remodeling and diabetic cardiomyopathy

AJP Heart and Circulatory Physiology ◽

10.1152/ajpheart.00004.2019 ◽

2019 ◽

Vol 316 (6) ◽

pp. H1237-H1252 ◽

Cited By ~ 6

Author(s):

Sumit Kar ◽

Tyler N. Kambis ◽

Paras K. Mishra

Keyword(s):

Cell Death ◽

Hydrogen Sulfide ◽

Diabetic Cardiomyopathy ◽

Myocardial Cell ◽

Therapeutic Strategies ◽

Targeted Therapeutics ◽

Gaseous Molecule ◽

Cardioprotective Effects ◽

Cell Death Signaling ◽

And Oxidative Stress

The death of cardiomyocytes is a precursor for the cascade of hypertrophic and fibrotic remodeling that leads to cardiomyopathy. In diabetes mellitus (DM), the metabolic environment of hyperglycemia, hyperlipidemia, and oxidative stress causes cardiomyocyte cell death, leading to diabetic cardiomyopathy (DMCM), an independent cause of heart failure. Understanding the roles of the cell death signaling pathways involved in the development of cardiomyopathies is crucial to the discovery of novel targeted therapeutics and biomarkers for DMCM. Recent evidence suggests that hydrogen sulfide (H2S), an endogenous gaseous molecule, has cardioprotective effects against cell death. However, very little is known about signaling by which H2S and its downstream targets regulate myocardial cell death in the DM heart. This review focuses on H2S in the signaling of apoptotic, autophagic, necroptotic, and pyroptotic cell death in DMCM and other cardiomyopathies, abnormalities in H2S synthesis in DM, and potential H2S-based therapeutic strategies to mitigate myocardial cell death to ameliorate DMCM.

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