Comparative analysis of phytochemicals and nutrient availability in two contrasting cultivars of sweet potato (Ipomoea batatas L.)

Shekhar, Shubhendu ; Mishra, Divya ; Buragohain, Alak Kumar ; Chakraborty, Subhra ; Chakraborty, Niranjan (2015) Comparative analysis of phytochemicals and nutrient availability in two contrasting cultivars of sweet potato (Ipomoea batatas L.) Food Chemistry, 173 . pp. 957-965. ISSN 0308-8146

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.foodchem.2014.09.172

Abstract

Sweet potato ranks as the world’s seventh most important food crop, and has major contribution to energy and phytochemical source of nutrition. To unravel the molecular basis for differential nutrient availability, and to exploit the natural genetic variation(s) of sweet potato, a series of physiochemical and proteomics experiment was conducted using two contrasting cultivars, an orange-fleshed sweet potato (OFSP) and a white-fleshed sweet potato (WFSP). Phytochemical screening revealed high percentage of carbohydrate, reducing sugar and phenolics in WFSP, whereas OFSP showed increased levels of total protein, flavonoids, anthocyanins, and carotenoids. The rate of starch and cellulose degradation was found to be less in OFSP during storage, indicating tight regulation of gene(s) responsible for starch-degradation. Comparative proteomics displayed a cultivar-dependent expression of proteins along with evolutionarily conserved proteins. These results suggest that cultivar-specific expression of proteins and/or their interacting partners might play a crucial role for nutrient acquisition in sweet potato.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Anthocyanins; Flavonoids; Nutritional Diversity; Phenolics; Phytochemicals; Proteome Profiling; Storage Stress; Transcript Abundance
ID Code:100228
Deposited On:30 Nov 2016 11:57
Last Modified:30 Nov 2016 11:57

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