Abstract
Oligosaccharides from the water-soluble β-glucan, Salecan, were investigated to evaluate the activation effect on the defense responses of Arabidopsis thaliana Col0. Salecan oligosaccharides (ScOs, DP 5–10) were prepared at first by acid hydrolysis and gel filtration chromatography and then employed for foliar spray on Arabidopsis seedlings and plants. After ScOs treatment, increase of hydrogen peroxide was histologically and analytically detected in leaves. Transcription levels of several indicator genes which correspond to the signaling pathways and pathogenesis-related proteins were up-regulated at different time by means of quantitative RT-PCR analysis. Importantly, the sequential activation of salicylic acid-mediated and jasmonate-mediated signaling pathway was observed in leaves. Furthermore, pot test and antimicrobial test gave the fact that pretreatment with ScOs restrained the leaf lesions caused by infection of Botrytis cinerea Bc0510 via the enhancement of defense responses of A. thaliana. In conclusion, Salecan oligosaccharides serve as an elicitor which can be used for biological control of plant pathogen.
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Acknowledgements
This work is funded by the research grants from the National Natural Science Foundation of China (No. 31500418), the Natural Science Foundation of Jiangsu Province (Grants No. BK20150773), and the Fundamental Research Funds for the Central Universities (No. 30915011101, 30915011310). The authors would like to thank these organizations for financial supports.
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Xu, H., Li, J., Wang, S. et al. Oligosaccharide elicitor prepared from Salecan triggers the defense responses of Arabidopsis thaliana Col0 against Botrytis cinerea infection. World J Microbiol Biotechnol 33, 165 (2017). https://doi.org/10.1007/s11274-017-2333-3
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DOI: https://doi.org/10.1007/s11274-017-2333-3