Home⇛Annals of Tropical Research⇛vol. 48 no. 1 (2026)

Effect of Sweet Potato Flour Supplementation on Salak Pondoh (Salacca zalacca) Yogurt Properties and Stability During Storage

Neti Yuliana | Dyah Koesoemawardani | Dewi Sartika | Andani Tiara | Novi Ayu Lestari | Novita Herdiana | Lotis E. Mopera

 

Abstract:

Background: Fruit yogurt often undergoes physical and chemical deterioration due to the instability of its texture. Adding naturalbased stabilizers, such as fermented sweet potato flour, has been investigated as a potential approach for yogurt stabilization. Objectives: This study aimed to evaluate the effect of adding different concentrations (0%, 0.5%, 1%, 1.5%, 2%, and 2.5% w/w) of fermented sweet potato flour on the physicochemical and sensory properties of salak pondoh fruit yogurt and to determine the best treatment during storage. Methods: Yogurt samples were prepared with varying concentrations of fermented sweet potato flour and analyzed for physicochemical properties, including pH, acidity, water-holding capacity, total soluble solids, viscosity, and syneresis. The growth of lactic acid bacteria was also evaluated. Sensory analysis was conducted to assess overall acceptability. The samples were stored and evaluated over 21 days at 5oC. Results: Significant differences were observed in the physicochemical properties of yogurt supplemented with fermented sweet potato flour. Improvements in viscosity and water-holding capacity and reductions in syneresis were noted with increasing concentrations. Likewise, the growth of lactic acid bacteria increased with higher levels of supplementation. Fermented sweet potato flour at 2.5% resulted in the lowest syneresis without affecting physicochemical properties or overall acceptability. Additionally, yogurt supplemented with 2.5% flour maintained good quality during 21 days of storage. Conclusions: Fermented sweet potato flour at 2.5% can be used as an effective natural stabilizer in salak pondoh fruit yogurt, improving its quality and storage stability.



References:

  1. Abbaspour, N. (2024). Fermentation's pivotal role in shaping the future of plant-based foods: An integrative review of fermentation processes and their impact on sensory and health benefits. Applied Food Research, 4(2), 100468. https://doi.org/10.1016/j.afres.2024.100468
  2. Afiati, F., Priadi, G., & Setiyoningrum, F. (2018). The improvement of functional food in yogurt enriched with purple sweet potato (Ipomoea batatas var. Ayamurasaki). Journal of the Indonesian Tropical Animal Agriculture, 43(2), 159–168. https://doi.org/10.14710/jitaa.43.2.159-168
  3. Ajayi, O. I., Ehiwuogu-Onyibe, J., Oluwole, O. B., Jegede, A. A., Salami, T. A., Asieba, G. O., Chiedu, I. E., Suberu, Y. L., Aba. E. M., Dike, E. N., Ajuebor, F. N. & Elemo, G. N. (2016). Production of fermented sweet potato flour using indigenous starter cultures. African Journal of Microbiology Research, 10(41), 1746–1758. https://doi.org/10.5897/AJMR2016.8016
  4. Alkaisy, Q. H., & Rahi, A. K. (2022). Desirable physical and rheological properties of yogurt produced with a traditional starter compared to different commercial starters. Journal of Hygienic Engineering and Design, 41, 375–380. https://keypublishing.org/jhed/wp-content/uploads/2023/02/25.-Full-paper-Quasar-Hamed-ALKaisy.pdf
  5. Altemimi, A. B. (2018). Extraction and optimization of potato starch and its application as a stabilizer in yogurt manufacturing. Foods, 7(2), 14. https://doi.org/10.3390/foods7020014
  6. Arab, M., Yousefi, M., Khanniri, E., Azari, M., Ghasendeh-Mohammadi, V., & Mollakhalili-Meybodi, N. (2023). A comprehensive review on yogurt syneresis: Effect of processing conditions and added additives. Journal of Food Science and Technology, 60(6), 1656–1665. https://doi.org/10.1007/s13197-022-05403-6
  7. Barus, W. L., Bachruddin, Z., Hanim, C., & Yusiati, L. M. (2020). Effect of yellow sweet potato extract (Ipomoea batatas L.) as a prebiotic source for the kinetics of fermentation and the production of lactic acid by Lactobacillus paracasei. IOP Conference Series: Earth and Environmental Science, 686, 012047. https://doi.org/10.1088/1755-1315/686/1/012047
  8. De Albuquerque, T. M. R., Sampaio, K. B., & De Souza, E. L. (2019). Sweet potato roots: Unrevealing an old food as a source of health-promoting bioactive compounds—A review. Trends in Food Science & Technology, 85, 277–286. https://doi.org/10.1016/j.tifs.2018.11.006
  9. De Albuquerque, T. M. R., Borges, C. W. P., Cavalcanti, M. T., Lima, M. D. S., Magnani, M., & De Souza, E. L. (2020). Potential prebiotic properties of flour from different varieties of sweet potato (Ipomoea batatas L.) roots cultivated in Northeastern Brazil. Food Bioscience, 36, 100614. https://doi.org/10.1016/j.fbio.2020.100614
  10. Dereje, B., Girma, A., Mamo, D., & Chalchisa, T. (2020). Functional properties of sweet potato flour and its role in product development: A review. International Journal of Food Properties, 23(1), 1639–1662. https://doi.org/10.1080/10942912.2020.1818776
  11. Dimitrellou, D., Solomakou, N., Kokkinomagoulos, E., & Kandylis, P. (2020). Yogurts supplemented with juices from grapes and berries. Foods, 9(9), 1158. https://doi.org/10.3390/foods9091158
  12. El Attar, A., Ahmed, N. E. H., Soda, E. L., & Zaki, S. M. (2022). The impact of sweet potato flour supplementation on functional and sensorial properties of yoghurt. Food and Nutrition Sciences, 13, 404–423. https://doi.org/10.4236/fns.2022.134030
  13. Felismino, M. M., Oliveros, M. C. R., Bautista, J. A. N., & Mopera, L. E. (2020). Best inclusion rate of purple yam “Kinampay” (Dioscorea alata L.) powder in yoghurt. Philippine Journal of Veterinary and Animal Sciences, 46(1), 31–41. http://www.pjvas.org/index.php/pjvas/article/viewFile/243/216
  14. Ismail, N. A., & Bakar, M. F. A. (2018). Salak—Salacca zalacca . In:  S. Rodrigues, E. O. Silva, & E. S. Brito (Eds.), Exotic Fruits Reference Guide eBook ISBN 9780128031384 (pp. 383–388). UK: Academic Press. https://www.researchgate.net/profile/Saichol-Ketsa/publication/323618353_Durian_Durio_zibethinus/links/5e8c66aa92851c2f5286bfa9/Durian-Durio-zibethinus.pdf
  15. Khalifa, M. E. A., Elgasim, A. E., Zaghloul, A. H., & Mahfouz, M. B. (2011). Applications of inulin and mucilage as stabilizers in yoghurt production. American Journal of Food Technology, 6(1), 31–39. https://doi.org/10.3923/ajft.2011.31.39
  16. Khalil, O. S., Ismail, H. A., & Elkot, W. F. (2022). Physicochemical, functional, and sensory properties of probiotic yoghurt flavored with white sapote fruit (Casimiroa edulis). Journal of Food Science and Technology, 59(9), 3700–3710.  https://doi.org/10.1007/s13197-022-05393-5
  17. Lambertus, E., Srianta, I., Liem, D., Wanaputra, F., Nugerahani, I., Kuswardhni, I., & Tewfik, I. (2022). Enhancement of the lactic acid bacteria population, chemical and organoleptic properties of soygurt with nutraceuticals from purple sweet potato (Ipomoea batatas L.) paste. E3S Web of Conferences, 344, 02004. https://doi.org/10.1051/e3sconf/202234402004
  18. Li, J., Zhou, T., Yang, Z., Cen, Q., Zhang, R., Hui, F., Chen, H., Dai, Z., & Zeng, X. (2024). Physicochemical, structural, and metabolic products of yogurt as affected by Coriolus versicolor fermented sweet potato pulp water. Food Chemistry X, 23, 101582. https://doi.org/10.1016/j.fochx.2024.101582
  19. Liu, M., Li, X., Zhou, S., Wang, T. T., Zhou, S., Yang, K., Li, Y., Tian, J., & Wang, J. (2020). Dietary fiber isolated from sweet potato residues promotes a healthy gut microbiome profile. Food & Function, 11(1), 689–699. https://doi.org/10.1039/C9FO01009B
  20. Mazumdar, P., Pratama, H., Lau, S. E., Teo, C. H., & Harikrishna, J. A. (2019). Biology, phytochemical profile and prospects for snake fruit: An antioxidant-rich fruit of Southeast Asia. Trends in Food Science & Technology, 91, 147–158. https://doi.org/10.1016/j.tifs.2019.06.017
  21. Muchiri, M. N., & McCartney, A. L. (2017). In vitro investigation of orange-fleshed sweet potato prebiotic potential and its implication on human gut health. Functional Foods in Health and Disease, 7(10), 833–848. https://doi.org/10.1016/j.tifs.2019.06.017
  22. Muñoz-Tebar, N., Muñoz-Bas, C., Viuda-Martos, M., Sayas-Barberá, E., Pérez-Álvarez, J. A., & Fernández-López, J. (2024). Fortification of goat milk yogurts with date palm (Phoenix dactylifera L.) coproducts: Impact on their quality during cold storage. Food Chemistry, 454, 139800. https://doi.org/10.1016/j.foodchem.2024.139800
  23. Nurdjanah, S., & Yuliana, N. (2018). Ubi jalar: Teknologi produksi dan karakteristik tepung ubi jalar ungu termodifikasi. Penerbit CV. Anugrah Utama Raharja. http://repository.lppm.unila.ac.id/10992/1/isbn%20UBI%20JALAR-3.pdf
  24. Pereira, C., Henriques, M., Gomes, D., Gomez-Zavaglia, A., & De Antoni, G. (2015). Novel functional whey-based drinks with great potential in the dairy industry. Food Technology and Biotechnology, 53(3), 307–314. https://doi.org/10.17113/ftb.53.03.15.4043
  25. Parasthi, L. Y. E., Afifah, D. N., Nissa, C., & Panunggal, B. (2020). Total lactic acid bacteria and antibacterial activity in yoghurt with addition of Ananas comosus Merr. and Cinnamomum burmannii. Amerta Nutrition, 4(4), 257–264. https://doi.org/10.20473/amnt.v4i4.2020.257-264
  26. Prihatini, R., Budiyanti, T., & Al-Khayri, J. M. (2023). Environmental friendly snake fruit (Salacca spp.) cultivation for agricultural land utilization and conservation supporting climate change resilience. In J. M. Al-Khayri et al. (Eds.), Cultivation for climate change resilience (Vol. 1, pp. 272–286). CRC Press. https://www.taylorfrancis.com/chapters/edit/10.1201/9780429055584-15/environmental-friendly-snake-fruit-salacca-spp-cultivation-agricultural-land-utilization-conservation-supporting-climate-change-resilience-riry-prihatini-tri-budiyanti-jameel-al-khayri
  27. Ragab, E. S., Zhang, S., Korma, S. A., Buniowska-Olejnik, M., Nasser, S. A. A., Esatbeyoglu, T., Lv, J., & Nassar, K. S. (2023). Physicochemical and rheological properties of stirred yoghurt during storage induced from high-intensity thermosonicated goat and cow milk. Fermentation, 9(1), 42. https://doi.org/10.3390/fermentation9010042
  28. Rani, R., Unnikrishnan, V., Dharaiya, C. N., & Singh, B. (2012). Factors affecting syneresis in yoghurt: A review. Indian Journal of Dairy & Biosciences, 23, 1–9. https://www.researchgate.net/publication/335528113_FACTORS_AFFECTING_SYNERESIS_IN_YOGHURT_A_REVIEW
  29. Sanchez, L., Perez, D., & Parron, J. A. (2020). HPP in dairy products: Impacts on quality and applications. In: F.J. Barba, C. Tonello-Samson, E. Puertolas, & M. Lavilla (Eds). Present and Future of High Processing: A Tool for Developing Innovative, Safe and Healthy Food. eBook ISBN: 9780128172667 (245-272). USA: Elsevier.  https://doi.org/10.1016/B978-0-12-816405-1.00011-X
  30. Saleh, A., Mohamed, A. A., Alamri, M. S., Hussain, S., Qasem, A. A., & Ibraheem, M. A. (2020). Effect of different starches on the rheological, sensory and storage attributes of non-fat set yogurt. Foods, 9(1), 61. https://doi.org/10.3390/foods9010061
  31. Shaheryar, M., Afzaal, M., Nosheen, F., Imran, A., Islam, F., Noreen, R., Shehzadi, U., Shah, M. A., & Rasool, A. (2023). Functional exploration of taro starch (Colocasia esculenta) supplemented yogurt. Food Science & Nutrition, 11(6), 2697–2707. https://doi.org/10.1002/fsn3.3358
  32. Sidgel, A., Ojha, P., & Karki, T. B. (2018). Phytochemicals and syneresis of osmo-dried mulberry incorporated yoghurt. Food Science & Nutrition, 6(4), 1045–1052. https://doi.org/10.1002/fsn3.645
  33. Simatupang, T. H., Hartini, S., Mustika, D. A., Purwoto, A., Junef, M., Sanusi, A., Nugroho, T. W. A., Mareta, J., Jazuli, A., & Firdaus, I. (2024). Salak from Indonesia: Legal protection, potential geographical indications and development practices toward international markets. Cogent Social Sciences, 10(1), 2341963. https://doi.org/10.1080/23311886.2024.2341963
  34. Wong, S. S., Wicklund, R., Bridges, J., Whaley, J., & Koh, Y. B. (2020). Starch swelling behavior and texture development in stirred yogurt. Food Hydrocolloids, 98, 105274. https://doi.org/10.1016/j.foodhyd.2019.105274
  35. Ye, F., Xiao, L., Liang, Y., Zhou, Y., & Zhao, G. (2019). Spontaneous fermentation tunes the physicochemical properties of sweet potato starch by modifying the structure of starch molecules. Carbohydrate Polymers, 213, 79–88. https://doi.org/10.1016/j.carbpol.2019.02.077
  36. Yuliana, N., Nurdjanah, S., & Dewi, Y. R. (2018). Physicochemical properties of fermented sweet potato flour in wheat composite flour and its use in white bread. International Food Research Journal, 25(3), 1051–1059. http://ifrj.upm.edu.my/25%20(03)%202018/(23).pdf
  37. Yuliana, N., Zuidar, A. S., & Arpani, N. A. P. (2023). The effect of fermented sweet potato flour supplementation on the characteristics of Ambon banana yoghurt. MOJ Food Processing & Technology, 11(2), 106–109. https://doi.org/10.15406/mojfpt.2023.11.00287

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