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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences AGRIVITA, Journal of Agricultural Science
Mas'udah, Shofiyatul
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Agriculture, Biological Sciences & Forestry Environmental Science

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Biochemical Composition and Nutritional Value of Fresh Tuber of Water Yam (Dioscorea alata L.) Local Accessions from East Java, Indonesia Fauziah, Fauziah; Mas'udah, Shofiyatul; Hapsari, Lia; Nurfadilah, Siti
AGRIVITA, Journal of Agricultural Science Vol 42, No 2 (2020)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v0i0.2552

Abstract

Water yam (Dioscorea alata L.) is an important tuber crop containing essential nutrition as an alternative food source. This study aimed to analyze the biochemical composition and nutritional value of fresh tuber of fifteen local accessions of water yam from East Java and followed by the accession selection for the recommendation of accession with the best nutritional value. Results showed that the nutritional value of proximates including moisture, carbohydrate and fiber were significantly different; except in protein, fat, and ash, with the range of moisture (65.47-82.46%), carbohydrate (17.10-29.37%), protein (1.29- 3.00%), fat (0.00-0.29%), fiber (6.70-11.62%) and ash (0.85-1.44%). The ranges of mineral contents (mg/100g) were K (224.54-483.21), Ca (15.63-61.97), Mg (16.75-43.06), Fe (1.40-13.40), Zn (0.43-2.83) and P (329.37-699.91); Na mostly not detected. The anti-nutritions contents (mg/100g) comprised tannin (63.36-167.68) and oxalic acid (12.73-44.92). Analysis through HCA showed three clusters with a range of similarity from 67% to 96%; through PCA scatter biplot clearly illustrated the variation and correlation pattern among local accessions. Six promising accessions are recommended for further breeding and development i.e. Uwi Perti/30, Uwi Bangkulit/36, Uwi Bangkulit/42, Uwi Bangkulit/43, Uwi Biru/58 and Uwi Legi/66, based on their highest carbohydrates and protein content, and the lowest fat content.
Study on The Starch Granules Morphology of Local Varieties of Dioscorea hispida and Dioscorea alata Fauziah, Fauziah; Mas'udah, Shofiyatul; Hendrian, Hendrian
Journal of Tropical Life Science Vol 6, No 1 (2016)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.06.01.09

Abstract

Starch is regarded as vital in the food industry, where granule size and shape determine its function and uses. One plant taxon that is widely known as a starch source is Dioscorea (Dioscoreaceae), whose starch and protein content make it a healthy food. As the initial step to identify which varieties possess potential as starch sources, we conducted study on starch granule morphology of some local varieties of D. hispida and D. alata. The aim of this study was to determine shape and size variation of starch granule of each variety of D. hispida and D. alata. The results showed that starch granule morphology does not only vary between species of D. hispida and D. alata, but also among varieties of those species. The shape of starch granules in D. hispida is dominantly polygonal (polyhedral). It showed similar results as those reported by other authors in their studies, except that – in this study - we found there is also a triangular shape, which has never been reported before. Starch granule size of D. hispida is found to be “Very small – Small” and only 1 variety of the species – that is gadung jahe – is classified as “Small” type. According to previous studies, varieties with small type starch granule are recommended as potential sources for non-food industrial raw materials. The shape of starch granules in D. alata is similar to those reported in other studies, which is dominantly triangular and polygonal; the size is classified as “Medium” type, except for two varieties that are uwi ratu and uwi ulo (DC5), which are classified as “Large”. According to previous studies, varieties with large type starch granule are recommended as potential sources for food. Thus, from this study 3 potential local varieties are identified, i.e. gadung jahe of D. hispida, and uwi ratu & uwi ulo of D. alata.
Co-Authors Hendrian Hendrian, Hendrian Lia Hapsari Mudinillah, Adam Siti Nurfadilah