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Identification and expression analysis of MinD gene involved in plastid division in cassava
Lei Ke1, Liang-Jing Cao2, Meng-Ting Geng1
1a Hainan Key Laboratory for Sustainable Utilisation of Tropical Bioresource , Institute of Tropical Agriculture and Forestry, Hainan University , Haikou , China.
Abstract:
Cassava is a tropical crop known for its starchy root and excellent properties. Considering that starch biosynthesis in the amyloplast is affected by its division, it appears conceivable that the regulation of plastid division plays an important role in starch accumulation. As a member of the Min system genes, MinD participated in the spatial regulation of the position of the plastid division site.In our studies, sequence analysis and phylogenetic analysis showed that MeMinD has been highly conserved during the evolutionary process. Subcellular localisation indicated that MeMinD carries a chloroplast transit peptide and was localised in the chloroplast. Overexpression of MeMinD resulted in division site misplacement and filamentous formation in E. coli, indicating that MeMinD protein was functional across species. MeMinD exhibited different spatial and temporal expression patterns which was highly expressed in the source compared to that in the sink organ.
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