Acid phosphatase activity may affect the tuber swelling by partially regulating sucrose-mediated sugar resorption in potato

Journal of Integrative Plant Biology
Da-Yong WangDe-Wei Zhu

Abstract

APase activity is involved in regulating many physiological and developmental events by affecting the resorption process. In this study, we investigate the role of APase activity in tuber development in potato. APase activities were mainly localized in cytoplasm, gaps among cells and stroma of amyloplasts of parenchyma cells at the stage of tuber swelling. AP1, encoding a putative APase, was also highly expressed in swelling tubers and a low level of expression was observed in elongated stolons and matured tubers. Inhibition of APase activity by applying Brefeldin A, an inhibitor of APase production and secretion, significantly suppressed the tuber swelling and moderately affected the stolon elongation and the tuberization frequency. During tuber development, sucrose serves as the main soluble sugar for long-distance transportation and resorption. Moreover, inhibition of APase activity by Brefeldin A markedly reduced the sucrose content in tubers and further decreased the starch accumulation, suggesting that the function of APase in regulating the tuber swelling might be at least partially mediated by the sugar resorption. Exogenous sucrose treatments further indicate the important role of sucrose-mediated sugar resorption in t...Continue Reading

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Citations

Jun 12, 2012·Applied Biochemistry and Biotechnology·Asha Anand, Pramod Kumar Srivastava
Jan 18, 2017·Critical Reviews in Biotechnology·Som DuttHemant Balasaheb Kardile

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