Thermal and Morphological Characterization of Native and Plasticized Starches of Sweet Potato (Ipomoea batatas) and Diamante Yam (Dioscorea rotundata)

2020 ◽  
Author(s):  
Keydis Martinez Villadiego ◽  
Mary Judith Arias Tapia ◽  
J. Useche ◽  
Yorleys Ledesma ◽  
Alexander Leyton
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Morphological Characterization ◽  
Dioscorea Rotundata

AKURASI KARAKTERISASI TINGKAT IN SITU TANAMAN UBI JALAR PADA DUA KECAMATAN DI KABUPATEN SERAM BAGIAN BARAT

2017 ◽  
Vol 13 (2) ◽  
pp. 103-110
Author(s):  
Helen Hetharie ◽  
Simon H T Raharjo ◽  
Gelora H Augustyn ◽  
Marietje Pesireron
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Leaf Shape ◽  
Morphological Characters ◽  
Morphological Characterization ◽  
Ex Situ ◽  
Survey Method ◽  
In Situ Characterization

Morphological characters of above ground plant parts can be used to distinguishsweet potato accessions. The objective of this study was to get a number of diversity of sweet potato accessions based on above ground part morphology and to determine the accuracy of in situ characterization. This study used a survey method in five villages in two sub-districts, namely Inomosol and Huamual Muka, Western Ceram District. The first stage of this study involved in situ characterization, and the second stage involved planting and ex situ morphological characterization of 2-month-old plants which was used sweet potato descriptors. Data were analyzed descriptively and qualitatively. The results showed that there were 25 accessions of sweet potato found in Huamual Muka and Inomosol Sub-districts, as distinguished by leaf shape and color, leaf patterns and leaf lobe number, petiole and stem colors, and vine twisting tendency. Verification results of the above ground morphology showed accuracy of ≥80% in 3 phenotypes in leaf lobe pattern, shape of central leaf lobe, linear middle leaves, leaves with 1, 5 and 7 lobes, green abaxial leaf veins, 2 petiole color phenotypes, purplish red stem, and stem additional colors. Meanwhile, the accuracy of characterization of other phenotypes was 0-76%. Keywords: diversity, ex situ, Ipomoea batatas, Maluku, morphology   ABSTRAK Karakter morfologi tajuk ubi jalar dapat digunakan sebagai pembeda antar aksesi. Tujuan penelitian untuk mendapatkan sejumlah klon ubi jalar yang beragam berdasarkan morfologi tajuk serta ketepatan karakterisasi morfologi pada tingkat in situ. Penelitian ini menggunakan metode survei di lima desa pada dua kecamatan yaitu kecamatan Inomosol dan Huamual Muka pada Kabupaten Seram Bagian Barat, Propinsi Maluku. Tahap pertama dengan mengkarakterisasi morfologi tajuk di kebun petani (in situ), dan tahap kedua penanaman dan karakterisasi ex situ di kebun koleksi pada umur tanaman 2 bulan menggunakan deskriptor ubi jalar. Data dianalisis secara deskriptif kualitatif. Hasil penelitian menunjukkan bahwa terdapat 25 aksesi ubi jalar di kecamatan Inomosol dan Huamual Muka yang dibedakan berdasarkan bentuk dan warna daun, pola dan jumlah lekuk daun, warna tangkai dan batang, serta sifat membelit. Hasil verifikasi terhadap karakterisasi in situ didapatkan akurasi ≥80% pada 3 fenotip pada pola lekuk daun, daun dengan bentuk bagian tengah linear, daun dengan jumlah cuping 1, 5 dan 7, tulang daun permukaan bawah berwarna hijau, 2 fenotip pada warna tangkai daun, batang berwarna merah keunguan, serta ada warna tambahan pada batang. Sedangkan akurasi karakterisasi pada fenotip lainnya yaitu 0-76%. Kata kunci: ex situ, Ipomoea batatas, keragaman, Maluku, morfologi

Production and Characterization of Exopolysaccharides from Loss Cooked Sweet Potatoes (Ipomoea batatas) by Lactobacillus Plantarum

2021 ◽  
Vol 2 (7) ◽  
pp. 01-11
Author(s):  
Robert Germain Beka ◽  
Emmanuel Akdowa Panyoo ◽  
Germaine Yadang ◽  
Pamela Homsi ◽  
Laurette Blandine Mezajoug Kenfack ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Chemical Characterization ◽  
Sweet Potatoes ◽  
Fermentation Time ◽  
Total Sugars ◽  
Titrable Acidity ◽  
Lactic Acid Content

The aim of the work was to produce and characterize the exopolysaccharides from loss cooked sweet potato (Ipomoea batatas) using fermentation with Lactobacillus. The cooked sweet potato was fermented according to the factorial design with the following factors: the time (21.51h-38.48h) and the amount of Lactobacillus (1.58*106-5*106UFC). Responses were represented by production yield, pH, and titrable acidity. Characterization of the exopolysaccharides was then done by determination of total sugars, solubility index and viscosity. The results show that the pH of unfermented cooked potatoes was between 6.23 to 6.63. The pH of fermented potatoes varies from 3.96 to 4.06. The lactic acid content was found from 7.75 to 9.9% for the fermented samples. The production yields are 1.90% for the samples fermented for 21.5 hours with 3.5*106UFC of bacteria and 5.62% for those fermented for 30 hours with the same volume of inoculum. The average viscosity of the products was 4mPas regardless of the fermentation time. Chemical characterization indicates glucose contents of 68.21 and 94.01% in fermented potato for 24h and 21h respectively. The solubility index gives values of 70.3 ± 0.16 and 88.11 ± 0.23 for fermentation times of 21h and 24h respectively. Results of this work indicated that cooked sweet potatoes ferment for 21h was a promising substrate for production of exopolysaccharides.

scholarly journals Molecular characterization of genes encoding isoamylase-type debranching enzyme in tuberous root of sweet potato, Ipomoea batatas (L.) Lam.

2016 ◽  
Vol 33 (5) ◽  
pp. 351-359
Author(s):  
Moe Nabemoto ◽  
Riho Watanabe ◽  
Mizuho Ohsu ◽  
Kaname Sato ◽  
Motoyasu Otani ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Tuberous Root ◽  
Debranching Enzyme ◽  
Genes Encoding

scholarly journals Control of Sprouting of Yam (Dioscorea rotundata) and Sweet Potato (Ipomoea batatas) using African Cardamon (Aframomum danielli), Turmeric (Curcuma longa) and Clove (Syzygium aromaticum)

2017 ◽  
Vol 1 (1) ◽  
pp. 59
Author(s):  
G. O. Adegoke ◽  
A. O. Odebadeu ◽  
M. O. Afolabi
Keyword(s):  
Weight Loss ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Treatment Time ◽  
Curcuma Longa ◽  
Syzygium Aromaticum ◽  
Aqueous Extracts ◽  
Dioscorea Rotundata ◽  
Percentage Weight ◽  
The Difference

This study investigated the effects of the aqueous extracts of Aframomum danielli, Turmeric and Clove in sprouting of yam (Dioscorea rotundata) and sweet potato (Ipomoea batatas). The sliced tubers were dipped into the aqueous extracts of A. danielli, turmeric and Clove, each at concentrations of 5%, 10% and 15%. The tubers were allowed to stand in the solution for 5 and 10 minutes. Distilled water was used in the control samples. The yam slices were air dried after removal from the liquids, placed in paper boxes and incubated at room temperature (28.9 ± 4.0°C) and Relative Humidity of 44.6 ± 18.4 % for a period of six weeks (Bibah, 2014). Weight loss was determined by finding the difference between the initial and final weights and expressed as percentage weight loss. The results indicated that Turmeric treatments at different concentrations of 5%, 10% and 15% were more effective in reducing sprouting index at 5 minutes treatment time with values of 1.79%; 3.00% and 3.02% respectively. Clove treatment at 15%, 10% and 15% A. danielli treatment were more effective in controlling sprouting at 10 minutes treatment time for the yam tubers. There was no clear distinction in the effectiveness of each of aqueous extract of A. danielli, Turmeric and Clove in controlling sprouting at 5 and 10 minutes treatment time for sweet potato tubers.

Intercropping to control weeds in yam (Dioscorea rotundata) and sweet potato (Ipomoea batatas)

1969 ◽  
Vol 75 (1) ◽  
pp. 11-18
Author(s):  
Félix M. Román ◽  
Alberto Beale ◽  
Héber Irizarry
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Cropping Systems ◽  
Dioscorea Rotundata ◽  
Weed Population ◽  
Weed Growth ◽  
Tuber Production ◽  
Agricultural Experiment ◽  
Potato Yields ◽  
Made In

Monoculture and intercropping systems for yam (Dioscorea rotundata Poir) and sweet potato (Ipomoea batatas) production in two planting seasons were evaluated at the Corozal Agricultural Experiment Substation. In Experiment 1, yam cv. Guinea Blanco and sweet potato cv. Dominicana were planted the same date; and sweet potato 6 weeks before or after yam in February, April and May. In Experiment 2, the same cropping treatments were evaluated, but plantings were made in October and December 1983 and in January 1984. In this experiment Guinea Negro yam was used. In Experiment 1, sweet potato planted in monoculture or intercropped suppressed weed growth. However, the yam competition significantly reduced sweet potato yields. Although weeds grew freely in monoculture planting, yields were not significantly reduced. In Experiment 2, no significant differences were detected among cropping systems with regard to weed control. However, late plantings (December and January) reduced the weed population in both planting systems. When yam and sweet potato were intercropped during these months, the association did not affect yam production but did reduce sweet potato yields. The yam-sweet potato intercropping planting of December yielded highest for yams with 36,738 k/ha, and the highest combined yam-sweet potato tuber production with 59,014 k/ha. The sweet potato planted as a monoculture in December yielded (36,559 k/ha).

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