Isolation and characterisation of invertase inhibitor from sweet potato storage roots

2008 ◽  
Vol 88 (15) ◽  
pp. 2615-2621 ◽  
Author(s):  
Guan-Jhong Huang ◽  
Ming-Jyh Sheu ◽  
Yuan-Shiun Chang ◽  
Te-Ling Lu ◽  
Heng-Yuan Chang ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Potato Storage ◽  
Storage Roots ◽  
Invertase Inhibitor

scholarly journals 162 Assessment of daily intake by beef heifers of sweet potato storage roots under competitive limit-feeding conditions

2019 ◽  
Vol 97 (Supplement_1) ◽  
pp. 57-57
Author(s):  
Jane A Parish ◽  
Cobie Rutherford ◽  
Stephen L Meyers ◽  
Mark W Shankle
Keyword(s):  
Sweet Potato ◽  
Bos Taurus ◽  
Daily Intake ◽  
Feeding Strategies ◽  
Potato Storage ◽  
Beef Heifers ◽  
Storage Roots ◽  
Study Objective ◽  
Mean Values ◽  
Limit Feeding

Abstract Excess consumption of sweet potato storage roots (SWP) poses an acidosis risk to cattle that may be mitigated by limit-feeding strategies. Yet limit-feeding is often administered to achieve mean desired daily DMI in groups of cattle with little regard for DMI variation among individuals. The study objective was to assess variation in daily DMI of SWP by beef heifers in limit-fed, competitive feeding groups. Twenty-four 9- to 10-mo-old Bos taurus crossbred heifers were stratified by initial BW (261.9 ± 8.8 kg) to 4 paddocks (6 heifers/ paddock) and offered SWP (24.9% DM on an as-fed basis; 7.7% CP, 5.9% ADF and 80% TDN on a DM basis) supplementation daily at a rate of 3.4 kg DM/ paddock with ad libitum access to mixed-grass pasture. After a 7-d acclimation period in which all heifers were trained to use a GrowSafe system, daily SWP DMI was monitored for 39 days. Standard deviation estimates were calculated from DMI data and used to classify DMI into the following levels: low (2.0 kg, >0.5 SD). Half of the heifers (mean SWP DMI = 0.0 ± 0.02 kg) never consumed SWP at the high DMI level, but 42% of the heifers (mean SWP DMI = 1.1 ± 0.02 kg) consumed SWP at the high DMI level for at least 18 days over the study duration. No heifers consumed at the moderate DMI level more than 16 days during the trial. This suggests that DMI of individual cattle offered SWP in limit-fed groups often either exceeds by approximately 2-fold per animal mean values of SWP offered per group or is at or near zero. Additional research is needed to elucidate optimal group feeding strategies to achieve individual DMI targets among cattle offered SWP.

scholarly journals Metabonomic Profiling Analyses Reveal ANS Upregulation to Enhance the Flavonoid Pathway of Purple-Fleshed Sweet Potato Storage Root in Response to Deep Shading

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 737
Author(s):  
Ying He ◽  
Dan Zhu ◽  
Yujun Sun ◽  
Qian Wang ◽  
Lan Zhu ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Soluble Sugars ◽  
Economic Benefits ◽  
Mass Spectrometry Analysis ◽  
Anthocyanin Synthesis ◽  
Anthocyanin Content ◽  
Potato Storage ◽  
Storage Root ◽  
Flavonoid Pathway ◽  
Storage Roots

Intercropping, as a common worldwide cultivation pattern, provides opportunities for sustainable agriculture with fuller use of light, temperature and land resources and greater yield per unit of land. The intercropping impact on crop quality is a current focus. This study found that shading cultivation of purple-fleshed sweet potato can improve the storage root pigment accumulation by more than 20% to increase economic benefits. We performed gas chromatography and mass spectrometry analysis of storage roots of the anthocyanin-enriched cultivar Jihei-1 under 60% shading and nonshaded treatments. A total of 224 differential metabolites were identified, among which N-acetyl-5-hydroxytryptamine, 1-monopalmitin, 4-pyridoxic acid, dodecano, arbutin, tryptophan, citrulline and phenylalanine were significantly upregulated under shading with a more than 10-fold change. Furthermore, metabolic pathway enrichment maps were based on the biological processes and stratification level selected. These metabolites mainly influenced the pathways of phenylpropanoid biosynthesis, the citrate cycle, organic acid biosynthesis and metabolism and amino acid metabolism. Through tissue-specific dynamic changes in amino acids, soluble sugars, starch and anthocyanins during storage root development, we proposed a variety-specific strategy of purple-fleshed sweet potato in response to prolonged deep shading, that is, utilizing and enhancing broad aboveground-tissue photosynthesis and transferring photosynthates into roots in advance, leading to a rapid increase in storage root anthocyanin synthesis. With comprehensive qPCR, western blot and enzyme activity analyses, we identified three key enzymes, CHS, ANS and 3GT, in purple-fleshed sweet potato storage roots in response to shading, which affect the root anthocyanin content by influencing the flavonoid metabolism pathway. This study provides a theoretical basis for revealing the regulation of anthocyanin synthesis in crops and a guidance for high-quality sweet potato cultivation and nutritional improvement using shade facilities.

Virus-free sweet potato storage roots derived from meristem-tips and leaf-cuttings

1985 ◽  
Vol 26 (3) ◽  
pp. 231-240 ◽  
Author(s):  
C.G. Kuo ◽  
B.J. Shen ◽  
M.J. Shen ◽  
S.K. Green ◽  
D.R. Lee
Keyword(s):  
Sweet Potato ◽  
Potato Storage ◽  
Storage Roots

Influence of volatiles from healthy and decaying sweet potato storage roots on sclerotial germination and hyphal growth of Sclerotium rolfsii

1989 ◽  
Vol 67 (1) ◽  
pp. 53-57 ◽  
Author(s):  
C. A. Clark
Keyword(s):  
Sweet Potato ◽  
Sclerotium Rolfsii ◽  
Hyphal Growth ◽  
Root Tissue ◽  
Natural Soil ◽  
Potato Storage ◽  
Storage Root ◽  
Storage Roots ◽  
Sweet Potatoes ◽  
Directional Growth

Volatiles released from sweet potato storage root tissue infected by different sweet potato storage root pathogens stimulated eruptive germination of sclerotia of Sclerotium rolfsii but did not influence the direction of hyphal growth on agarose. Volatiles from healthy sweet potato storage root tissue did not affect percent hyphal or eruptive germination of sclerotia of S. rolfsii but stimulated directional growth of hyphae toward the healthy tissue. In laboratory experiments, the frequency of infection of sweet potato stem segments by S. rolfsii on the surface of natural soil was increased when sclerotia were incubated in the presence of decaying sweet potato storage root tissue. Incidence of sclerotial blight lesions on sprouts in plant beds was increased in the presence of roots infected by Fusarium solani or Erwinia chrysanthemi. Volatiles from decaying sweet potato mother roots may predispose sweet potatoes to sclerotial blight.

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