Abstract
Hydrogen peroxide (H2O2), a second messenger, plays a vital role in seed germination and plant growth, development as well as the acquisition of stress tolerance, while hydrogen sulfide (H2S) is considered as a new emerging cell signal molecule in higher plants. In the present study, soaking of H2O2 greatly improved germination percentage of Jatropha curcas seeds, stimulated the increase of l-cysteine desulfhydrase activity, which in turn induced accumulation of H2S. On the contrary, pretreatment of aminooxyacetic acid (AOA), inhibitor of H2S biosynthesis, eliminated H2O2 stimulated the increase of activity of l-cysteine desulfhydrase and accumulation of H2S as well as improvement of germination percentage. In addition, exogenously applied H2S also could improve germination percentage of seeds of J. curcas. These results suggested that pretreatment of H2O2 could improve germination percentage of J. curcas seeds and this improvement was mediated by H2S.
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Abbreviations
- AOA:
-
Aminooxy acetic acid
- ABA:
-
Abscisic acid
- ANOVA:
-
Analysis of variance
- APX:
-
Ascorbate peroxidase
- CaM:
-
Calmodulin
- DHA:
-
Dehydroascorbate
- DPI:
-
Diphenylene iodonium chloride
- DTT:
-
Dithiothreitol
- FW:
-
Fresh weight
- GSH:
-
Glutathione
- JA:
-
Jasmonic acid
- MDHA:
-
Modehydroascorbate reductase
- NO:
-
Nitric oxide
- RuBISCO:
-
Ribulose-1,5-bisphosphate carboxylase
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Acknowledgments
This research is supported by Key Grant of Education Department of Yunnan Province of China (ZD 2010004), Natural Science Foundation of Yunnan Province of China (2010ZC066).
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The authors declare that they have no conflicts of interest in regard to this research or its funding.
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Communicated by M. Horbowicz.
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Li, ZG., Gong, M. & Liu, P. Hydrogen sulfide is a mediator in H2O2-induced seed germination in Jatropha Curcas . Acta Physiol Plant 34, 2207–2213 (2012). https://doi.org/10.1007/s11738-012-1021-z
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DOI: https://doi.org/10.1007/s11738-012-1021-z