Research Article

Sugar Content and Physical Characterization of Four Selected African Nightshade (Solanum nigrum) Edible Berries

Elijah Heka Kamau
University of Eldoret, Kenya.
* Corresponding author
Julius Maina Mathara
Jomo Kenyatta University of Agriculture & Technology, Kenya.
Glaston Mwangi Kenji
Jomo Kenyatta University of Agriculture & Technology, Kenya.
DOI icon 10.24018/ejfood.2020.2.3.44

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Submitted 2020-04-30
Published 2020-05-21

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Table of Contents

Article Main Content

Fruits constitute a major part of the diet in many parts of the world, highly recommended for the nutritional value derived from them. Fruit maturity is an important determinant of the quality as it affects the appearance, an aspect of quality considered by most consumers. Sugar content, colour, size and firmness are some of the quality indicators associated with maturity. While the ripening and maturity indicators are well documented for climacteric fruits, non-climacteric fruits such as berries lag behind. African nightshade (Solanum nigrum L.)  edible berries are among them. This study evaluated the quality parameters of the edible berries of four varieties of African nightshade and found out that they accumulate glucose and fructose as they ripen with glucose being the most abundant sugar. Sucrose is only present during the senescence stage. Size remained relatively constant within each variety while firmness decreased progressively after veraison. Black NS differed with the others in colour besides fructose and sucrose content at 29.35 and 388.40 mg/100g, respectively. Giant NS recorded the highest glucose content at 172.44 mg/100g when ripe. Conclusively, the African nightshade berries are characteristically similar to other non-climacteric fruits adopted as part of the normal diet and should be considered as a valuable addition to the diet.

Keywords: Berries, African nightshade, Ripening, Firmness, Colour.

References

  1. H. Jia, Y. Wang, M. Sun, B. Li, Y. Han, Y. Zhao, … W. Jia, “Sucrose functions as a signal involved in the regulation of strawberry fruit development and ripening,” New Phytologist, Vol. 198, pp. 453–465, 2013.
     Google Scholar
  2. A.A. Kader, “Fruit maturity, ripening, and quality relationships,” in L. Michalczuk (Ed.), Int. Symp. on Effect of Pre- and Post Harvest Factors on Storage of Fruit. Acta Hortic., 1999, pp. 485:203-208.
     Google Scholar
  3. C. Davies and C. Böttcher, “Hormonal control of grape berry ripening.” Glen Osmond, Australia: Commonwealth Scientific and Industrial Research Organization, 2009 https://doi.org/10.1007/978-90-481-2305-6
     Google Scholar
  4. O.A. Fawole and U.L. Opara, "Changes in physical properties, chemical and elemental composition and antioxidant capacity of pomegranate ( cv . Ruby ) fruit at five maturity stages," Scientia Horticulturae, Vol. 150, pp. 37–46, 2013a.. https://doi.org/10.1016/j.scienta.2012.10.026
     Google Scholar
  5. S.Y. Wang, C. Chen and C.Y. Wang, "The influence of light and maturity on fruit quality and flavonoid content of red raspberries," Food Chem, Vol. 112, pp. 676–684, 2009. https://doi.org/10.1016/j.foodchem.2008.06.032
     Google Scholar
  6. X. Zhang, X. Wang, X. Wang, G. Xia, Q. Pan and R. Fan, "A Shift of Phloem Unloading from Symplasmic to Apoplasmic Pathway Is Involved in Developmental Onset of Ripening in Grape Berry," Plant Physiol., Vol. 142, pp. 220–232, 2006. https://doi.org/10.1104/pp.106.081430
     Google Scholar
  7. Li Mingjun, P. Li, F. Ma, A.M. Dandekar and L. Cheng, "Sugar metabolism and accumulation in the fruit of transgenic apple trees with decreased sorbitol synthesis," Hort. Res. Vol. 5, pp. 60–71, 2018. https://doi.org/10.1038/s41438-018-0064-8
     Google Scholar
  8. X. Tang, "Intrinsic change of physical and chemical properties of sea buckthorn (Hippophae rhamnoides) and implications for berry maturity and quality," The Journal of Horticultural Science and Biotechnology, Vol. 77(2), pp. 177–185, 2016. https://doi.org/10.1080/14620316.2002.11511476
     Google Scholar
  9. G. Zhang, Z. Xu, Y. Gao, X. Huang, Y. Zou, and T. Yang, "Effects of Germination on the Nutritional Properties, Phenolic Profiles, and Antioxidant Activities of Buckwheat," J. Food Sci, Vol. 80(118), pp. H1111–H1119, 2015. https://doi.org/10.1111/1750-3841.12830
     Google Scholar
  10. S.A Al-maiman and D. Ahmad, "Changes in physical and chemical properties during pomegranate ( Punica granatum L .) fruit maturation," Food Chem., Vol. 76, pp. 437–441, 2002.
     Google Scholar
  11. P. Legua, P. Melgarejo, M. Martinez and F. Hernandez, "Evolution of sugars and organic acid content in three pomegranate cultivars (Punica granatum L.)," Serie A, Seminaires Mediterraneens, Vol. 42, pp. 99–104, 2000.
     Google Scholar
  12. S.D. Castellarin, G.A. Gambetta, H. Wada, M.N. Krasnow, G.R. Cramer, E. Peterlunger, … M.A. Matthews, "Characterization of major ripening events during softening in grape : turgor, sugar accumulation, abscisic acid metabolism, colour development, and their relationship with growth," J. Exp. Bot., Vol. 67(3), pp. 709–722, 2016. https://doi.org/10.1093/jxb/erv483
     Google Scholar
  13. S.D. Castellarin, G.A. Gambetta, H. Wada, K.A. Shackel and M.A. Matthew, "Fruit ripening in Vitis vinifera: spatiotemporal relationships among turgor, sugar accumulation, and anthocyanin biosynthesis," J. Exp. Bot, Vol. 62(12), pp. 4345–4354, 2011. https://doi.org/10.1093/jxb/err150
     Google Scholar
  14. F. Lecourieux, C. Kappel, D. Lecourieux, A. Serrano, E. Torres, P. Arce-johnson and S. Delrot, "An update on sugar transport and signalling in grapevine," J. Exp. Bot, Vol. 65(3), Vol. 821–832, 2014. https://doi.org/10.1093/jxb/ert394
     Google Scholar
  15. M.S. Defelice, "The Black Nightshades, Solanum nigrum L - Poison, Poultice, and Pie," Weed Tech, Vol. 17(2), pp. 421–427, 2003.
     Google Scholar
  16. H. Sarma and A. Sarma, "Solanum nigrum L ., a Nutraceutical Enriched Herb or Invasive Weed ?" 2011 International Conference on Environment and BioScience, Vol. 21, pp. 105–109, 2011.
     Google Scholar
  17. C. Bvenura & A.J. Afolayan (2016) Maturity effects on mineral concentration and uptake in Solanum nigrum L . L., Acta Agriculturae Scandinavica, Section B. - Soil & Plant Sci, 64(8):657–665. https://doi.org/10.1080/09064710.2014.953984
     Google Scholar
  18. A. Ribera-Fonseca, M. Noferrini, E. Jorquera-Fontena and A.D. Rombola, "Assessment of technological maturity parameters and anthocyanins in berries of cv. Sangiovese (Vitis vinifera L.) by a portable vis/NIR device," Scientia Horticulturae, Vol. 209, pp. 229–235, 2016.
     Google Scholar
  19. H. Lee and J. Lee, "Effects of Various Kinds of Salt on the Quality and Storage Characteristics of Tteokgalbi," Korean J. Food Sci. An., 34(5):604–613, 2014.
     Google Scholar
  20. M. Li, M. Chen, Y. Zhang, C. Fu, B. Xing, W. Li, … X. Yang, "Apple Fruit Diameter and Length Estimation by Using the Thermal and Sunshine Hours Approach and Its Application to the Digital Orchard Management Information System," PLOS One, Vol. 10(4), pp. 1–13, 2015. https://doi.org/10.1371/journal.pone.0120124
     Google Scholar
  21. D.D. Leite, de F, Queiroz, M.J. de, R.M.F. de Figuiredo, A.R.N. Campos, D.C. Santos and T.L.B. de Lima, "Germination Impact in the Nutrition and Technological Properties of Jackfruit Seeds," Journal of Agricultural Studies, Vol. 8(1), pp. 79–100, 2020. https://doi.org/10.5296/jas.v8i1.15524
     Google Scholar
  22. M.A. Hayes, C. Davies and I.B. Dry, "Isolation, functional characterization, and expression analysis of grapevine ( Vitis vinifera L .) hexose transporters: differential roles in sink and source tissues*," Journal of Experimental Botany, Vol. 58(8), pp. 1985–1997, 2007. https://doi.org/10.1093/jxb/erm061
     Google Scholar
  23. A. Raffo, F. Paoletti and M. Antonelli, "Changes in sugar , organic acid , flavonol and carotenoid composition during ripening of berries of three seabuckthorn (Hippophae rhamnoides L.) cultivars," Eur Food Res Technol, Vol. 219, pp. 360–368, 2004. https://doi.org/10.1007/s00217-004-0984-4
     Google Scholar
  24. O.A. Fawole and U.L. Opara, "Developmental changes in maturity indices of pomegranate fruit: A descriptive review," Scientia Horticulturae, Vol. 159, pp. 152–161, 2013b. https://doi.org/10.1016/j.scienta.2013.05.016
     Google Scholar
  25. C. Davies and S.P. Robinson, "Sugar Accumulation in Grape Berries," Plant Physiol, Vol. 111, pp. 275–283, 1996.
     Google Scholar
  26. S. Yamaki, "Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation," J. Japan Soc. Hort. Sci, Vol. 79(1), pp. 1–15, 2010.
     Google Scholar
  27. L. Fuentes, C.R. Figueroa and M. Valdenegro, "Recent Advances in Hormonal Regulation and Cross-Talk during Non-Climacteric Fruit Development and Ripening," Horticulturae, Vol. 5(45), pp. 1–28, 2019.
     Google Scholar
  28. B. Dobrzanski and R. Rybczynski, Color as a Quality Factor of Fruits and Vegetables, In J. et al Blahovec (Ed.), Physical Methods in Agriculture, New York, NY: Springer Science, pp. 376-377, 1999.
     Google Scholar
  29. S. Forlani, S. Masiero and C. Mizzotti, "Fruit Ripening: The role of hormones, cell wall modifications and their intersection with pathogens," J. Exp. Bot, Vol. 70(11), pp. 2993–3006, 2019.
     Google Scholar
  30. D.A. Brummell, "Cell wall disassembly in ripening fruit," Functional Plant Biology, Vol. 33, pp. 103–119, 2006.
     Google Scholar
  31. J. Kan, J. Liu and C.H. Jin, "Changes in cell walls during fruit ripening in Chinese ‘Honey’ peach," J. Hort. Sci. Biotech, Vol. 88(1), pp. 37–46, 2013. https://doi.org/10.1080/14620316.2013.11512933
     Google Scholar
  32. D.A. Brummell, V.D. Cin, C.H. Crisosto and J.M. Labavitch, "Cell wall metabolism during maturation, ripening and senescence of peach fruit," Journal of Experimental Botany, Vol. 55(405), pp. 2029–2039, 2004. https://doi.org/10.1093/jxb/erh227
     Google Scholar
  33. K.J. Nunan, I.M. Sims, A. Bacic, S.P. Robinson and G.B. Fincher, "Changes in Cell Wall Composition during Ripening of Grape Berries," Plant Physiol. Vol. 118, pp. 783–792, 1998.
     Google Scholar