PJB-2019-1529
Morphology and structure of starch granules in storage root of purple sweet potato
Hongmei Zhu, Meng Zhao, Xiaodan Su, Meijun Zhu and Gang Gao
Abstract
The microstructure and formation process of starch granule in purple sweet potato tube were examined by light microscopy (LM), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) in this study. The results showed that the proliferation of division activities of amyloplasts was followed by massive accumulation of amyloplasts in cells. The amyloplasts then produced several eccentric starch granules, and the structure of binary and tetrad starch granules was evident upon imaging by LM, TEM, and SEM. In the original formation of starch granule, there were no absolute crystals aggregated. Some blocklet crystals gradually appeared in the starch granules as numerous ‘microgranules’ were tightly connected into the chain, containing the double helix of amylopectin. Many ‘microgranules’ were observed on the exterior surface of the starch granule and formed multiple concentric shells which increased the diameter of starch.
To Cite this article:
Zhu, H., M. Zhao, X. Su, M. Zhu and G. Gao. 2019. Morphology and structure of starch granules in storage root of purple sweet potato. Pak. J. Bot., 51(5): DOI: http://dx.doi.org/10.30848/PJB2019-5(19)
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