Document Detail

Roles of hydrogen sulfide and nitric oxide in the alleviation of cadmium-induced oxidative damage in alfalfa seedling roots.
MedLine Citation:
PMID:  22538639     Owner:  NLM     Status:  Publisher    
Despite hydrogen sulfide (H(2)S) and nitric oxide (NO) are important endogenous signals or bioregulators involved in many vital aspects of plant growth and responses against abiotic stresses, little information was known about their interaction. In the present study, we evaluated the effects of H(2)S and NO on alfalfa (Medicago sativa L.) plants exposed to cadmium (Cd) stress. Pretreatment with an H(2)S donor sodium hydrosulfide (NaHS) and well-known NO donor sodium nitroprusside (SNP) decreased the Cd toxicity. This conclusion was supported by the decreases of lipid peroxidation as well as the amelioration of seedling growth inhibition and Cd accumulation, in comparison with the Cd-stressed alone plants. Total activities and corresponding transcripts of antioxidant enzymes, including superoxide dismutase, peroxidase and ascorbate peroxidase were modulated differentially, thus leading to the alleviation of oxidative damage. Effects of H(2)S above were reversed by 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide potassium salt (cPTIO), the specific scavenger of NO. By using laser confocal scanning microscope combined with Greiss reagent method, further results showed that NO production increased significantly after the NaHS pretreatment regardless of whether Cd was applied or not, all of which were obviously inhibited by cPTIO. These decreases of NO production were consistent with the exaggerated syndromes associated with Cd toxicity. Together, above results suggested that NO was involved in the NaHS-induced alleviation of Cd toxicity in alfalfa seedlings, and also indicated that there exists a cross-talk between H(2)S and NO responsible for the increased abiotic stress tolerance.
Le Li; Yanqin Wang; Wenbiao Shen
Related Documents :
22488489 - Molecular characterization of mercury resistant bacteria inhabiting polluted water bodi...
22796009 - The effects of copper, manganese and zinc on plant growth and elemental accumulation in...
22297229 - Survival and performance of two cellulose-degrading microbial systems inoculated into w...
22668599 - Ozonation as an advanced oxidant in treatment of bamboo industry wastewater.
22629279 - Plant cell wall integrity maintenance as an essential component of biotic stress respon...
22404479 - A fungal endophyte reinforces population adaptive differentiation in its host grass spe...
16370309 - Correlation study of toxicity of substituted phenols to river bacteria and their biodeg...
16781029 - Degradation and toxicity of phenyltin compounds in soil.
20877999 - Influence of soil temperature and moisture on the infectivity of entomopathogenic nemat...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-27
Journal Detail:
Title:  Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine     Volume:  -     ISSN:  1572-8773     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9208478     Medline TA:  Biometals     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
College of Life Sciences, Cooperative Demonstration Laboratory of Centrifuge Technique of Nanjing Agricultural University and Beckman Coulter Ltd. Co., Nanjing, 210095, People's Republic of China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  The Effect of the Microenvironment Created by a Titanium Mesh Cage on Subcutaneous Experimental Bone...
Next Document:  Protective role of simvastatin on isolated rabbit atrioventricular node during experimental atrial f...