甘藷WRKY轉錄因子參與受傷誘導鈣離子訊息路徑調控sporamin基因表現

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甘藷WRKY轉錄因子參與受傷誘導鈣離子訊息路徑調控sporamin基因表現

The Sweet Potato WRKY Transcription Factors Regulate Sporamin Expression in Wound-Mediated Calcium Signaling Pathway

高正朴 , Masters　　Advisor：蕭世輝　　Co-advisor ：葉開溫

繁體中文

sporamin ； IbWRKY75 ； IbCaM41 ；晚期防禦表現； sporamin ； IbWRKY75 ； IbCaM41 ； late wounding response

Abstract │ Reference (38) │ Altmetrics

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Sporamin functions to inhibit the activity of trypsin uniquely in sweet potato. Sporamin is induced by herbivore attack and mechanical wounding. In previous study, the expression of sporamin in late response of wounding might be regulated by WRKY transcription factors and wound-mediated calcium influxes. In order to study the regulatory mechanism of sporamin expression by WRKY transcription factors and calcium signaling, we selected a wound-inducible WRKY transcription factors, IbWRKY75, and a calmodulin, IbCaM41, from transcriptome database. Then, the full-length sequence of IbWRKY75 and IbCaM41 were cloned by RLM-RACE technology. The phylogenetic tree showed that IbWRKY75 is closely to AtWRKY45, which belongs to the group I of WRKY transcription factors, and IbCaM41 is similar to AtCaM38. Based on expression analysis under treatment of wounding, osmotic stress and calcium chloride by qPCR, IbWRKY75 and IbCaM41 might be a positive regulator for sporamin expression upon calcium influxes. Furthermore, subcellular localization analysis of IbWRKY75 and IbCaM41 showed that IbWRKY75 and IbCaM41 are localized in nucleus and cytosol, and they could interact with each other by yeast-two hybridization assay. Collectively, we suggest that IbWRKY75 participate in wound-mediated calcium signaling via interaction with IbCaM41 to regulate sporamin expression.

Reference ( 38 ) 〈TOP〉

Apel K. and Hirt H. (2004). Reactive Oxygen Species: Metabolism, Oxidative Stress, and Signal Transduction. Plant Biology, 55, 373-399.
連結：
Bowles, D. J. (1990). Defense-Related Proteins in Higher-Plants. Annual Review of Biochemistry, 59, 873-907.
連結：
Baron, C. and Zambryski, P. C. (1995). The plant response in pathogenesis, symbiosis, and wounding: variations on a common theme? Annual Review of Genetics, 29, 107-129.
連結：
Bakshi1, M. and Oelmüller, R. (2014). WRKY transcription factors Jack of many trades in plants. Plant Signaling & Behavior, 9 (e27700), 1-18.
連結：
de Bruxelles, G. L. and Roberts, M. R., (2001). Signals regulating multiple responses to wounding and herbivores. Critical Reviews in Plant Sciences, 20, 487-521.
連結：

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