Akoetey, W, Britain, MM and Morawicki, RO (2017) Potential use of byproducts from cultivation and processing of sweet potatoes. Ciência Rural, Santa Maria 47: e20160610, 8 pp.
Ameny, M and Wilson, P (1997) Relationship between hunter color values and β-carotene contents in white fleshed African sweet potatoes (Ipomoea batatas Lam.). Journal of the Science of Food and Agriculture 73: 301–306.
Anonymous (2018a) Command® 3ME microencapsulated herbicide. Specimen label. FMC Corporation, Philadelphia, Pennsylvania, USA, 19 pp. Available at http://www.cdms.net/ldat/ld324004.pdf (accessed 14 August 2018).
Arias, R, Lee, T-C, Logendra, L and Janes, H (2000) Correlation of lycopene measured by HPLC with the L*, a*, b* color readings of a hydroponic tomato and the relationship of maturity with color and lycopene content. Journal of Agricultural and Food Chemistry 48: 1697–1702.
Armitage, AM and Garner, JM (2001) Ipomoea batatas ‘Margarita’. HortScience 36: 178.
Bolger, M, Schwacke, R, Gundlach, H, Schmutzer, T, Chen, J, Arend, D, Oppermann, M, Weise, S, Lange, M, Fiorani, F, Spannagl, M, Scholz, U, Mayer, K and Usadel, B (2017) From plant genomes to phenotypes. Journal of Biotechnology 261: 46–52.
Carvalho, IS, Cavaco, T, Carvalho, LM and Duque, P (2010) Effect of photoperiod on flavonoid pathway activity in sweet potato (Ipomoea batatas (L.) Lam.) leaves. Food Chemistry 118: 384–390.
Chalfant, RB, Jansson, RK, Seal, DR and Schalk, JM (1990) Ecology and management of sweet potato insects. Annual Review of Entomology 35: 157–180.
Chao, P-Y, Huang, Y-P and Hsieh, W-B (2013) Inhibitive effect of purple sweet potato leaf extract and its components on cell adhesion and inflammatory response in human aortic endothelial cells. Cell Adhesion and Migration 7: 237–245.
Chao, P-Y, Lin, S-Y, Lin, K-H, Liu, Y-F, Hsu, J-I, Yang, C-M and Lai, J-Y (2014) Antioxidant activity in extracts of 27 indigenous Taiwanese vegetables. Nutrients 6: 2115–2130.
Chen, C-M, Li, S-C, Lin, Y-L, Hsu, C-Y, Shieh, M-J and Liu, J-F (2005) Consumption of purple sweet potato leaves modulates human immune response: t-lymphocyte functions, lytic activity of natural killer cell and antibody production. World Journal of Gastroenterology 11: 5777–5781.
Claessens, L, Stoorvogel, JJ and Antle, JM (2009) Ex ante assessment of dual-purpose sweet potato in the crop-livestock system of western Kenya: a minimum-data approach. Agricultural Systems 99: 13–22.
Clark, CA, Ferrin, DM, Smith, TP and Holmes, GJ (2013) Compendium of Sweetpotato Diseases, Pests, and Disorders. St. Paul, Minnesota, USA: APS Press, American Phytopathological Society, 160 pp.
Close, DC and Beadle, CL (2003) The ecophysiology of foliar anthocyanin. The Botanical Review 69: 149–161.
de Pascual-Teresa, S and Sanchez-Ballesta, MT (2008) Anthocyanins: from plant to health. Phytochemistry Reviews 7: 281–299.
Dwivedi, SL, Scheben, A, Edwards, D, Spillane, C and Ortiz, R (2017) Assessing and exploiting functional diversity in germplasm pools to enhance abiotic stress adaptation and yield in cereals and food legumes. Frontiers in Plant Science 8: Article 1461, 30 pp.
Gibson, RW, Mpembe, I, Alicai, T, Carey, EE, Mwanga, ROM, Seal, SE and Vetten, HJ (1998) Symptoms, aetiology and serological analysis of sweet potato virus disease in Uganda. Plant Pathology 47: 95–102.
Gould, KS (2004) Nature's Swiss army knife: the diverse protective roles of anthocyanins in leaves. BioMed Research International 5: 314–320.
Gould, KS, Davies, KM and Winefield, C (2009) Anthocyanins: Biosynthesis, Functions, and Applications. New York, USA: Springer, 336 pp.
Gregory, P (1987) Exploration, maintenance, and utilization of sweet potato genetic resources. Report of the First Sweet Potato Planning Conference, 23–27 February 1987. International Potato Center (CIP), Lima, Peru, 369 pp.
Harrison, HF and Jackson, DM (2011) Greenhouse assessment of differences in clomazone tolerance among sweetpotato cultivars. Weed Technology 25: 501–505.
Hualla, VR, Simon, R, Mwanga, R, Soto, HSJ and Montesinos, GR (2015) The sweetpotato ontology. Metadata and ubiquitous access to culture. In: Proceedings DCMI International Conference on Dublin Core and Metadata Applications. 1–4 September 2015, Sao Paulo, Brazil, pp. 206–208. Available at http://hdl.handle.net/10568/72497 (accessed 14 August 2018).
Huamán, Z, Aguilar, C and Ortiz, R (1999) Selecting a Peruvian sweetpotato core collection on the basis of morphological, eco-geographical, and disease and pest reaction data. Theoretical and Applied Genetics 98: 840–844.
Huang, Y-J, To, K-Y, Yap, M-N, Chiang, W-J, Suen, D-F and Chen, S-CG (2001) Cloning and characterization of leaf senescence up-regulated genes in sweet potato. Physiologia Plantarum 113: 384–391.
Hue, S-M, Boyce, AN and Somasundram, C (2011) Influence of growth stage and variety on the pigment levels in Ipomoea batatas (sweet potato) leaves. African Journal of Agricultural Research 6: 2379–2385.
Hue, S-M, Boyce, AN and Somasundram, C (2012) Antioxidant activity, phenolic and flavonoid contents in the leaves of different varieties of sweet potato (Ipomoea batatas). Australian Journal of Crop Science 6: 375–380.
Hue, S-M, Boyce, AN and Somasundram, C (2014) Extraction from agricultural waste, Ipomoea batatas L. Lam leaves as a cheap source of natural dye. International Journal of Environmental Bioremediation and Biodegradation 2: 1–4.
Humplík, JF, Lazár, D, Husiíková, A and Spíchal, L (2015) Automated phenotyping of plant shoots using imaging methods for analysis of plant stress responses – a review. Plant Methods 11: 29.
Hunt, RWG (1991) Measuring Colour Ellis Horwood Series in Applied Science and Industrial Technology, 2nd edn. Chichester, UK: Ellis Horwood Ltd., 313 pp.
Hunter, RS and Harold, RW (1987) The Measurement of Appearance, 2nd edn. New York, USA: Wiley-Interscience Publ, John Wiley & Sons, Inc, 411 pp.
Ishida, H, Suzuno, H, Sugiyama, N, Innami, S, Tadokoro, T and Maekawa, A (2000) Nutritive evaluation on chemical components of leaves, stalks and stems of sweet potatoes (Ipomoea batatas poir). Food Chemistry 68: 359–367.
Ishiguro, K, Toyama, J, Islam, MS, Yoshimoto, M, Kumagai, T, Kai, Y, Nakazawa, Y and Yamakawa, O (2004) Suioh, a new sweetpotato cultivar for utilization in vegetable greens. ISHS Acta Horticulturae 637: 339–367.
Islam, MS (2006) Sweetpotato (Ipomoea batatas L.) leaf: its potential effect on human health and nutrition. Journal of Food Science 71: R13–R21.
Islam, MS, Yoshimoto, M, Terahara, N and Yamakawa, O (2002a) Anthocyanin compositions in sweetpotato (Ipomoea batatas L.) leaves. Bioscience, Biotechnology, and Biochemistry 66: 2483–2486.
Islam, MS, Yoshimoto, M, Yahara, S, Okuno, S, Ishiguro, K and Yamakawa, O (2002b) Identification and characterization of foliar polyphenolic composition in sweetpotato (Ipomoea batatas L.) genotypes. Journal of Agricultural and Food Chemistry 50: 3718–3722.
Islam, MS, Yoshimoto, M, Ishiguro, K and Yamakawa, O (2003) Bioactive compounds in Ipomoea batatas leaves. ISHS Acta Horticulturae 628: 693–699.
Islam, MS, Jalaluddin, M, Garner, JO, Yoshimoto, M and Yamakawa, O (2005) Artificial shading and temperature influence on anthocyanin compositions in sweetpotato leaves. HortScience 40: 176–180.
Jackson, DM, Harrison, HF, Jarret, RL and Wadl, PA (2018a) Color analysis of storage roots from the USDA, ARS sweetpotato germplasm collection. Genetic Resources and Crop Evolution 65: 1217–1236.
Jackson, DM, Harrison, HF, Jarret, RL and Wadl, PA (2018b) Data from: Color analysis of sweetpotato leaves from the USDA, ARS germplasm collection. Ag Data Commons Beta, United States Department of Agriculture, Agricultural Research Service, National Agriculture Library. Available at https://data.nal.usda.gov/dataset/data-color-analysis-sweetpotato-leaves-usda-ars-germplasm-collection (accessed 14 August 2018).
Johnson, M and Pace, RD (2010) Sweet potato leaves: properties and synergistic interactions that promote health and prevent disease. Nutrition Reviews 68: 604–615.
Johnson, ET, Berhow, MA and Dowd, PF (2008) Colored and white sectors from star-patterned petunia flowers display differential resistance to corn earworm and cabbage looper larvae. Journal of Chemical Ecology 34: 757–765.
Karageorgou, P and Manetas, Y (2006) The importance of being red when young: anthocyanins and the protection of young leaves of Quercus coccifera from insect herbivory and excess light. Tree Physiology 26: 613–621.
Karna, P, Gundala, SR, Gupta, MV, Shamsi, SA, Pace, RD, Yates, C, Narayan, S and Aneja, R (2011) Polyphenol-rich sweet potato greens extract inhibits proliferation and induces apoptosis in prostate cancer cells in vitro and in vivo. Carcinogenesis 32: 1872–1880.
Khoo, H-E, Prasad, KN, Kong, K-W, Jiang, Y and Ismail, A (2011) Carotenoids and their isomers: color pigments in fruits and vegetables. Molecules 16: 1710–1738.
Lee, J-S, Park, Y-K, Ahn, Y-S, Kim, H-S, Chung, M-N, Jeong, B-C and Bang, J-K (2007) Antioxidative and biological activities of extracts of sweetpotato tips. Korean Journal of Crop Science 52: 411–420.
Levene, H (1960) Robust tests for equality of variances. In: Olkin, I, Ghurye, SG, Hoeffding, W, Madow, WG and Mann, HB (eds) Contributions to Probability and Statistics: Essays in Honor of Harold Hotelling. Palo Alto, California, USA: Stanford University Press, pp. 278–292.
Lev-Yadun, S and Gould, KS (2008) Role of anthocyanins in plant defense. In: Winefield, C, Davies, K and Gould, K (eds) Anthocyanins: Biosynthesis, Functions, and Applications. New York, USA: Springer, pp. 22–28.
Liao, WC, Lai, Y-C, Yuan, M-C, Hsu, Y-L and Chan, C-F (2011) Antioxidative activity of water extract of sweet potato leaves in Taiwan. Food Chemistry 127: 1224–1228.
Luo, C-L, Zhou, Q, Yang, Z-W, Wang, R-D and Zhang, J-L (2018) Evaluation of structure and bioprotective activity of key high molecular weight acylated anthocyanin compounds isolated from the purple sweet potato (Ipomoea batatas L. cultivar Eshu No. 8). Food Chemistry 241: 23–31.
McGuire, RG (1992) Reporting of objective color measurements. HortScience 27: 1254–1255.
McLaren, K (1976) XIII-The development of the CIE 1976 (L*a*b*) uniform colour space and colour-difference formula. Journal of the Society of Dyers and Colourists 92: 338–341.
Menelaou, E, Kachatryan, A, Losso, JN, Cavalier, M and LaBonte, D (2006) Lutein content in sweetpotato leaves. HortScience 41: 1269–1271.
Mohanraj, R and Sivasankar, S (2014) Sweet potato (Ipomoea batatas [L.] Lam) – A valuable medicinal food: a review. Journal of Medicinal Food 17: 733–741.
Mortley, DG, Burrell, S, Bonsi, CK, Hill, WA and Morris, CE (2009) Influence of daily light period and irradiance on yield and leaf elemental concentration of hydroponically grown sweetpotato. HortScience 44: 1491–1493.
Moyer, JW and Salazar, LF (1989) Viruses and virus-like diseases of sweet potato. Plant Disease 73: 451–455.
Murugan, S, Paramasivam, SK and Nedunchezhiyan, M (2012) Sweet potato as an animal feed and fodder. In: Nedunchezhiyan, M and Byju, G (eds), Sweet Potato. Fruit, Vegetable and Cereal Science and Biotechnology 6 (Special Issue 1). Ikenobe, Japan: Global Sci Books, Ltd, UK, pp. 106–114.
Mussoline, EA and Wilkie, AC (2017) Feed and fuel: the dual-purpose advantage of an industrial sweetpotato. Journal of the Science of Food and Agriculture 97: 1567–1575.
Niyireba, TN, Ebong, C, Agili, S, Low, J, Lukuyu, B, Kirui, J, Ndirigwe, J, Uwimana, G, Kakundiye, L, Mutimura, M, Gahakwa, D and Gachuiri, CK (2013) Evaluation of dual purpose sweet potato [Ipomoea batatas (L.) Lam] cultivars for root and fodder production in Eastern province Rwanda. Agricultural Journal 8: 242–247.
Ojong, PB, Njiti, V, Guo, Z, Gao, M, Besong, S and Barnes, SL (2008) Variation of flavonoid content among sweetpotato accessions. Journal of the American Society for Horticultural Science 133: 819–824.
Oren-Shamir, M (2009) Does anthocyanin degradation play a significant role in determining pigment concentration in plants? Plant Science 177: 310–316.
Oren-Shamir, M and Levi-Nissim, A (1997) Temperature effects on the leaf pigmentation of Cotinus coggygria ‘Royal purple’. Journal of Horticultural Science 72: 425–432.
Pace, RD, Dull, GG, Phills, BR, Bonsi, C and Forrester, IT (1988) The effect of topping frequency on nutrient content of sweet potato green tips. Journal of Food Composition and Analysis 1: 326–333.
Pathare, PB, Opara, UL and Al-Said, FAJ (2013) Colour measurement and analysis in fresh and processed foods: a review. Food and Bioprocess Technology 6: 36–60.
Pecota, K, Yencho, GC and Pierce, C (2004a) Ornamental sweetpotato plant named ‘Sweet Caroline Purple’. United States Patent Number US PP14,912 P3. Available at http://www.google.com/patents/USPP14912 (Accessed 14 August 2018). Pecota, K, Yencho, GC and Pierce, C (2004b) Ornamental sweetpotato plant named ‘Sweet Caroline Light Green’. United States Patent Number US PP15,028 P2. Available at http://www.google.com/patents/USPP15028 (Accessed 14 August 2018). Pecota, K, Yencho, GC and Pierce, C (2004c) Ornamental sweetpotato plant named ‘Sweet Caroline Bronze’. United States Patent Number US PP15,437 P3. Available at http://www.google.com/patents/USPP15437 (Accessed 14 August 2018). Pecota, K, Yencho, GC and Hancock, CN Jr (2007) Ornamental sweetpotato plant named ‘Sweet Caroline Red. United States Patent Number US PP17,483 P3. Available at http://www.google.com/patents/USPP17483 (Accessed 14 August 2018).
Prokopy, RJ and Owens, ED (1983) Visual detection of plants by herbivorous insects. Annual Review of Entomology 28, 337–364.
Quisenberry, SS and Ni, X (2007) Feeding injury. In: van Emden, H and Harrington, R (eds) Aphids as Crop Pests. Oxford, UK: CABI, Oxford University Press, pp. 331–352.
Ravi, V and Saravanan, R (2012) Crop physiology of sweet potato. In: Nedunchezhiyan, M and Byju, G (eds), Sweet Potato. Fruit, Vegetable and Cereal Science and Biotechnology 6 (Special Issue 1). Ikenobe, Japan: Global Science Books, Ltd, UK, pp. 17–29.
Roca, WM, Laliberté, B, Renoso, D, Rao, R and de Chavez, H (2007) Global Strategy for ex-Situ Conservation of Sweet Potato Genetic Resources. Lima, Peru: International Potato Center (CIP), 76 pp.
Rodríguez-Delfín, A, Posadas, A, León-Velarde, C, Mares, V and Quiroz, R (2011) Effect of salt and water stress on the proline and total chlorophyll content and nutrients uptake on two sweet potato cultivars grown on soilless culture. In: II International Symposium on Soilless Culture and Hydroponics. ISHS Acta Horticulturae 947: 55–62.
Si, Z, Du, B, Huo, J, He, S, Liu, Q and Zhai, H (2016) A genome-wide BAC-end sequence survey provides first insights into sweetpotato (Ipomoea batatas (L.) Lam.) genome composition. BMC Genomics 17: 945, 15 pp.
Simko, I, Jimenez-Berni, JA and Sirault, XRR (2017) Phenomic approaches and tools for phytopathologists. Phytopathology 107: 6–17.
Steyn, WJ, Wand, SJE, Holcroft, DM and Jacobs, G (2002) Anthocyanins in vegetative tissues: a proposed unified function in photoprotection. New Phytologist 155: 349–361.
Steel, RGD and Torrie, JH (1960) Principles and Procedures of Statistics. New York, USA: McGraw-Hill Book Company Incorporated, 481 pp.
Sun, H, Mu, T, Xi, L, Zhang, M and Chen, J (2014) Sweet potato (Ipomoea batatas L.) leaves as nutritional and functional foods. Food Chemistry 156: 380–389.
Tairo, F, Mneney, E and Kullaya, A (2008) Morphological and agronomical characterization of sweet potato [Ipomoea batatas (L.) Lam.] germplasm collection from Tanzania. African Journal of Plant Science 2: 77–85.
Tanaka, M, Ishiguro, K, Oki, T and Okuno, S (2017) Functional components in sweetpotato and their genetic improvement. Breeding Science 67: 52–61.
Truong, V-D, McFeeters, RF, Thompson, RT, Dean, LL and Shofran, B (2007) Phenolic acid content and composition in leaves and roots of common commercial sweetpotato (Ipomoea batatas L.) cultivars in the United States. Journal of Food Science 72: 343–349.
Tucker, AO, Maciarello, MJ and Tucker, SS (1991) A survey of color charts for biological descriptions. Taxon 40: 201–214.
Ustin, SL, Gitelson, AA, Jacquemoud, S, Schaepman, M, Asner, GP, Gamon, JA and Zarco-Tejada, P (2009) Retrieval of foliar information about plant pigment systems from high resolution spectroscopy. Remote Sensing of Environment 113: S67–S77.
Veasey, EA, Borges, A, Rosa, MS, Queiroz-Silva, JR, de Andrade Bressan, E and Peroni, N (2008) Genetic diversity in Brazilian sweet potato (Ipomoea batatas (L.) Lam) landraces assessed with microsatellite markers. Genetics and Molecular Biology 31: 725–733.
Villareal, RL, Tsou, SCS, Lin, SK and Chiu, SC (1979) Use of sweet potato (Ipomoea batatas) leaf tips as vegetables II. Evaluation of yield and nutritive quality. Experimental Agriculture 15: 117–122.
Voss, DH (1992) Relating colorimeter measurement of plant color to the royal horticultural society colour chart. HortScience 27: 1256–1260.
Wadl, PA, Olukolu, BA, Branham, SE, Jarret, RL, Yencho, GC and Jackson, DM (2018) Genetic diversity and population structure of the USDA sweetpotato (Ipomoea batatas) germplasm collections using GBSpoly. Frontiers in Plant Science 9, article 1166, 13 pp. Available at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6111789/pdf/fpls-09-01166.pdf (accessed 20 November 2018).
Wang, S, Nie, S and Zhu, F (2016) Chemical constituents and health effects of sweet potato. Food Research International 89: 90–116.
Weng, J-H, Chien, L-F, Jiang, C-Y, Shih, F-C and Chen, H-Y (2011) A comparison between yellow-green and green cultivars of four vegetable species in pigments, ascorbate, photosynthesis, energy dissipation, and photoinhibition. Photosynthetica 49: 361–370.
Woolfe, JA (1992) Sweet Potato: An Untapped Food Reserve. Cambridge University Press, Cambridge, UK, 643 pp.
Wyszecki, G and Stiles, WS (1982) Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd edn. New York, USA: Wiley-Interscience Publication, John Wiley & Sons, Incorporated, 949 pp.
Yencho, GC and Pecota, K (2008a) Ornamental sweetpotato plant named ‘Sweet Caroline Bewitched Purple’. United States Patent Number US PP18,574 P3. Available at http://www.google.com/patents/USPP18574 (Accessed 14 August 2018). Yencho, GC and Pecota, K (2008b) Ornamental sweetpotato plant named ‘Sweet Caroline Green Yellow’. United States Patent Number US PP18,673 P3. Available at http://www.google.com/patents/USPP18673 (Accessed 14 August 2018). Yencho, GC and Pecota, K (2008c) Ornamental sweetpotato plant named ‘Sweet Caroline Sweetheart Red’. United States Patent Number US PP19,013 P3. Available at http://www.google.com/patents/USPP19013 (Accessed 14 August 2018). Yencho, GC, Pecota, K and Hancock, CN Jr (2008a) Ornamental sweetpotato plant named ‘Sweet Caroline Sweetheart Light Green’. United States Patent Number US PP18,572 P3. Available at http://www.google.com/patents/USPP18572 (Accessed 14 August 2018). Yencho, GC, Pecota, K and Hancock, CN Jr (2008b) Ornamental sweetpotato plant named ‘Sweet Caroline Sweetheart Purple’. United States Patent Number US PP18,573 P3. Available at http://www.google.com/patents/USPP18573 (Accessed 14 August 2018).
Yoshimoto, M, Kurata, R, Okuno, S, Ishiguro, K, Yamakawa, O, Tsubata, M, Mori, S and Takagaki, K (2006) Nutritional value and physiological functions of sweetpotato leaves. ISHS Acta Horticulturae 703: 107–115.