NO, hydrogen sulfide does not come first during tomato response to high salinity
| Autor: | Luzia V. Modolo, Lázaro Eustáquio Pereira Peres, Cristiane J. da-Silva, Mateus H. Vicente, Débora C.F. Mollica |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Salinity Cancer Research Physiology Hydrogen sulfide Clinical Biochemistry Nitric Oxide medicine.disease_cause Plant Roots Salt Stress 01 natural sciences Biochemistry Nitric oxide Crop 03 medical and health sciences chemistry.chemical_compound Solanum lycopersicum Botany medicine Nitric Oxide Donors Hydrogen Sulfide biology Abiotic stress Chemistry fungi food and beverages equipment and supplies biology.organism_classification Plant Leaves SALINIDADE DO SOLO 030104 developmental biology Solanum Oxidative stress 010606 plant biology & botany |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1089-8603 |
| Popis: | High salinity greatly impacts agriculture, particularly in tomato (Solanum lycopersicum), a crop that is a model to study this abiotic stress. This work investigated whether hydrogen sulfide (H2S) acts upstream or downstream of nitric oxide (NO) in the signaling cascade during tomato response to salt stress. An NO-donor incremented H2S levels by 12-18.9% while an H2S-donor yielded 10% more NO in roots. The NO accumulated in roots one-hour after NaCl treatment while H2S accumulation started two-hour later. The NO stimulated H2S accumulation in roots/leaves, but not the opposite (i.e H2S was unable to stimulate NO accumulation) two-hour post NaCl treatment. Also, NO accumulation was accompanied by an increment of transcript levels of genes that encode for H2S-synthesizing enzymes. Our results indicate that H2S acts downstream of NO in the mitigation of oxidative stress, which helps tomato plants to tolerate high salinity. |
| Databáze: | OpenAIRE |
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