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Hydrogen Sulfide Promotes Wheat Seed Germination and Alleviates Oxidative Damage against Copper Stress
- Source :
- Journal of Integrative Plant Biology. 50:1518-1529
- Publication Year :
- 2008
- Publisher :
- Wiley, 2008.
-
Abstract
- With the enhancement of copper (Cu) stress, the germination percentage of wheat seeds decreased gradually. Pretreatment with sodium hydrosulfide (NaHS), hydrogen sulfide (H(2)S) donor alleviated the inhibitory effect of Cu stress in a dose-dependent manner; whereas little visible symptom was observed in germinating seeds and radicle tips cultured in NaHS solutions. It was verified that H(2)S or HS(-) rather than other sulfur-containing components derived from NaHS attribute to the potential role in promoting seed germination against Cu stress. Further studies showed that NaHS could promote amylase and esterase activities, reduce Cu-induced disturbance of plasma membrane integrity in the radicle tips, and sustain lower levels of malondialdehyde and H(2)O(2) in germinating seeds. Furthermore, NaHS pretreatment increased activities of superoxide dismutase and catalase and decreased that of lipoxygenase, but showed no significant effect on ascorbate peroxidase. Alternatively, NaHS prevented uptake of Cu and promoted the accumulation of free amino acids in seeds exposed to Cu. In addition, a rapid accumulation of endogenous H(2)S in seeds was observed at the early stage of germination, and higher level of H(2)S in NaHS-pretreated seeds. These data indicated that H(2)S was involved in the mechanism of germinating seeds' responses to Cu stress.
- Subjects :
- Lipoxygenase
Germination
Sodium hydrosulfide
Plant Science
Sulfides
medicine.disease_cause
Plant Roots
Biochemistry
Antioxidants
General Biochemistry, Genetics and Molecular Biology
Superoxide dismutase
chemistry.chemical_compound
Ascorbate Peroxidases
Malondialdehyde
Radicle
medicine
Hydrogen Sulfide
Food science
Triticum
biology
Superoxide Dismutase
Cell Membrane
Esterases
food and beverages
Hydrogen Peroxide
Catalase
Oxidative Stress
Peroxidases
chemistry
Amylases
Seeds
biology.protein
Copper
Oxidative stress
Peroxidase
Subjects
Details
- ISSN :
- 17447909 and 16729072
- Volume :
- 50
- Database :
- OpenAIRE
- Journal :
- Journal of Integrative Plant Biology
- Accession number :
- edsair.doi.dedup.....aef017bc2427a7c480d4e6272a56808e