scholarly journals Texture and Unsaccharified Residual Starch Content in Steamed Roots of Sweet Potato Cultivars with Varying Levels of Beta-amylase Activity

2017 ◽  
Vol 64 (2) ◽  
pp. 59-65 ◽  
Author(s):  
Yoshiyuki Nakamura ◽  
Ryouichi Masuda ◽  
Toshikazu Kuranouchi ◽  
Kenji Katayama
Keyword(s):  
Sweet Potato ◽  
Amylase Activity ◽  
Starch Content ◽  
Potato Cultivars

scholarly journals Storage Property Is Positively Correlated With Antioxidant Capacity in Different Sweet Potato Cultivars

2021 ◽  
Vol 12 ◽  
Author(s):  
Hui-Hui Song ◽  
Zhi-Lin Zhou ◽  
Dong-Lan Zhao ◽  
Jun Tang ◽  
Yan-Hong Li ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Antioxidant Enzyme ◽  
Sweet Potato ◽  
Amylase Activity ◽  
Principal Component ◽  
Potato Cultivars ◽  
Antioxidant Enzyme Activities ◽  
Tuberous Roots ◽  
Storage Properties ◽  
Storage Property

Sweet potato decays easily due to its high respiration rate and reactive oxygen species (ROS) accumulation during postharvest storage. In this study, we explored the relationship between antioxidant capacity in leaves and storage properties in different sweet potato cultivars, the tuberous roots of 10 sweet potato cultivars were used as the experimental materials to analyze the storage property during storage at 11–15°C. According to the decay percentage after 290 days of storage, Xu 32 was defined as a storage-tolerant cultivar (rot percentage less than 25%); Xu 55-2, Z 15-1, Shangshu 19, Yushu, and Zhezi 3 as above-moderate storage-tolerant cultivars (rot percentage ranging from 25 to 50%); Sushu 16, Yanshu 5, and Hanzi as medium-storable cultivars (rot percentage 50–75%); and Yan 25 as a storage-sensitive cultivar (rot percentage greater than 75%). Meanwhile, analysis of the α-amylase activity in root tubers of the 10 sweet potato cultivars during storage indicated that α-amylase activity was lowest in the storage-tolerant cultivar Xu 32 and highest in the storage-sensitive cultivar Yan 25. Evaluation of antioxidant enzyme activities and ROS content in the leaves of these 10 cultivars demonstrated that cultivar Xu 32, which showed the best storage property, had higher antioxidant enzyme activity [superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD)] but lower lipoxygenase (LOX) activity, hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents, and superoxide anion radical (O2⋅–) production rates compared with those of the storage-sensitive cultivar Yan 25 and the medium-storability cultivars Hanzi, Yanshu 5, and Sushu 16. Additionally, principal component analysis (PCA) suggested that sweet potato cultivars with different storage properties were clustered separately. Correlation and heat map analysis further indicated that CAT, APX, POD, and SOD activities were negatively correlated with α-amylase activity, while LOX activity and MDA and H2O2 contents were negatively correlated with the storage property of sweet potato. Combined, our findings revealed that storage property is highly correlated with antioxidant capacity in sweet potato leaves and negatively correlated with α-amylase activity in tuberous roots, which provides a convenient means for the screening of storage-tolerant sweet potato cultivars.

Chemical Compositions and Antioxidant Activities of Leaves and Stalks from Different Sweet Potato Cultivars

2012 ◽  
Vol 41 (12) ◽  
pp. 1656-1662 ◽  
Author(s):  
Meishan Li ◽  
Gwi Yeong Jang ◽  
Sang Hoon Lee ◽  
Koan Sik Woo ◽  
Hyun Man Sin ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Antioxidant Activities ◽  
Potato Cultivars ◽  
Chemical Compositions

scholarly journals Storage performance of Taiwanese sweet potato cultivars

2013 ◽  
Vol 51 (12) ◽  
pp. 4019-4025 ◽  
Author(s):  
Che-Lun Huang ◽  
Wayne C. Liao ◽  
Chin-Feng Chan ◽  
Yung-Chang Lai
Keyword(s):  
Sweet Potato ◽  
Potato Cultivars ◽  
Storage Performance

Analysis of accumulation and phytotoxicity mechanism of uranium and cadmium in two sweet potato cultivars

2021 ◽  
Vol 409 ◽  
pp. 124997
Author(s):  
Jin-long Lai ◽  
Ze-wei Liu ◽  
Chen Li ◽  
Xue-gang Luo
Keyword(s):  
Sweet Potato ◽  
Potato Cultivars

scholarly journals Quality Attributes of Malaysia Purple-Fleshed Sweet Potato at Different Peel Condition

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 872
Author(s):  
Nurfarhana Shaari ◽  
Rosnah Shamsudin ◽  
Mohd Zuhair Mohd Nor ◽  
Norhashila Hashim
Keyword(s):  
Vitamin C ◽  
Sweet Potato ◽  
Dry Matter ◽  
Nutritional Value ◽  
Amylose Content ◽  
Starch Content ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

In this study, physical and chemical properties (dry matter, ash, moisture, protein, fat, fiber, carbohydrate, starch, amylose, and vitamin C) of sweet potato tuber and flour of Anggun 1 cultivar were evaluated at different conditions. During peeling, the tuber and flour were processed subjected to three different conditions, which were unpeeled tubers (C1), peeled tubers (C2), and skin of tuber only (C3). From the results, the highest (p < 0.05) dry matter was observed in C1 while higher contents of ash, moisture, and protein were found in C3. Regarding the fat and vitamin C content, no significant differences (p > 0.05) were found between each condition. The highest fiber, carbohydrate, and amylose content (p < 0.05) were found in C1. The C1 and C2 reflected significantly higher (p < 0.05) starch content. Overall, these results provide important information about the peeling effect on the physical and chemical properties of Anggun 1. The information could be used as adding value to healthy food in the Malaysian diet due to the nutritional value of sweet potato.

Internal gas atmospheres, ethanol, and leakage of electrolytes from a flood-tolerant and a flood-susceptible sweet potato cultivar as influenced by anaerobiosis

1983 ◽  
Vol 61 (12) ◽  
pp. 3399-3404 ◽  
Author(s):  
Ling A. Chang ◽  
Larry K. Hammett ◽  
David M. Pharr
Keyword(s):  
Sweet Potato ◽  
Electrolyte Leakage ◽  
Potato Cultivar ◽  
Enriched Environment ◽  
Potato Cultivars ◽  
Susceptible Cultivar ◽  
Low Concentrations ◽  
Gas Atmosphere ◽  
High Concentrations

The postanaerobic behavior of sweet potato roots from a flood-tolerant cultivar, 'Centennial,' and a flood-susceptible cultivar, 'Caromex,' was studied. High concentrations of CO2 and low concentrations of O2 were present in the internal atmosphere of 'Caromex' roots even after the anaerobically pretreated roots were restored to air for a few days, whereas in 'Centennial,' the internal gas atmosphere was less affected by anoxia. Ethanol accumulation in 'Caromex' was consistently higher than in 'Centennial,' and the postanaerobic changes were different between cultivars. An inducation of electrolyte leakage was observed from both cultivars immediately after roots were exposed to a CO2-enriched environment for 48 h. The leakage became greater in 'Caromex' after a 3-day aerobic exposure. In 'Centennial,' leakage of electrolytes due to CO2 treatment diminished at the end of 3 days. Application of ethanol to the discs had no immediate effect on electrolyte leakage in either cultivar under a N2 environment. However, anaerobiosis alone resulted in higher electrolyte leakage. It remains to be determined that the postanaerobic patterns of 'Caromex' and 'Centennial' are characteristic of flood-susceptible and flood-tolerant sweet potato cultivars in general.

scholarly journals Morpho-physiological characteristics by sweet potato cultivars as function of irrigation depth

2018 ◽  
Vol 90 (4) ◽  
pp. 3541-3549
Author(s):  
FÁBIO T. DELAZARI ◽  
IGOR R. ASSIS ◽  
DIEGO F.V. CABRERA ◽  
MARIANE G. FERREIRA ◽  
LUIZ E. DIAS ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Potato Cultivars ◽  
Physiological Characteristics ◽  
Irrigation Depth

scholarly journals Primary metabolite mobilization during germination in rosewood (Aniba rosaeodora Ducke) seeds

2008 ◽  
Vol 32 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Renata Braga Souza Lima ◽  
José Francisco de Carvalho Gonçalves ◽  
Silvana Cristina Pando ◽  
Andréia Varmes Fernandes ◽  
André Luis Wendt dos Santos
Keyword(s):  
Seed Germination ◽  
Amylase Activity ◽  
Starch Content ◽  
Initial Period ◽  
Soluble Sugar ◽  
Soluble Sugars ◽  
Alpha Amylase ◽  
Primary Metabolite ◽  
Radicle Growth ◽  
Starch Mobilization

This study aimed to characterize protein, oil, starch and soluble sugar mobilization as well as the activity of alpha-amylase during rosewood seed germination. Germination test was carried out at 25°C and the following parameters were analyzed: percentage of germination, initial, average, and final germination time. Seed reserve quantification was monitored in quiescent seeds and during different stages of radicle growth. Starch mobilization was studied in function of a-amylase activity. Germination reached 87.5% at the initial, average, and final time of 16, 21 and 30 days, respectively. Oil mobilization showed a negative linear behavior, decreasing 40% between the first and the last stage analyzed, whereas protein levels increased 34.7% during the initial period of germination. Starch content (46.4%) was the highest among those of the metabolites analyzed and starch mobilization occurred inversely to the observed for soluble sugars; alpha-amylase activity increased until the 15th day, a period before radicle emission and corresponding to the highest starch mobilization. The high percentage of rosewood seed germination may be related to the controlled condition used in the germination chamber as well as to high seed reserve mobilization, in special oil and starch.

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