Seed Quality, and Fatty Acid and Sugar Contents of Pepper Seeds (Capsicum annuum L.) in Relation to Seed Development and Drying Temperatures

This study was carried out in order to determine the effects of drying temperature (25, 35, and 45 °C) and the developmental stage (55, 65, 75, and 85 days after anthesis (DAA)) on germination, vigor, and the sugar (sucrose, glucose, fructose) and fatty acid contents of pepper seeds (Capsicum annuum L.) over 2 consecutive years. In seeds harvested at 75 DAA and after, seed viability and vigor were not influenced by drying at temperatures up to 45 °C. Linoleic acid (18:2) was the main fatty acid in pepper seeds, comprising 75-80% of total fatty acids. It was followed by oleic (18:1) and palmitic (16:0) as roughly 10%-12% and stearic (18:0) as 3%. The results indicated that drying seeds at different temperatures does not change fatty acid composition. Approximately 30% of the pepper seeds are constituted of sucrose, and this did not change with maturity level between 55 and 85 DAA, nor did it change at different drying temperatures. However, the levels of fructose and glucose gradually decreased as the developmental stage advanced and both were lower than 4% of total sugar at the final harvest. Seeds dried at 45 °C had lower amounts of sugar compared to those dried at 25 and 35 °C. Seed quality and fatty acid and sucrose composition do not change as long as the seeds are harvested within 75 DAA.

Seed Quality, and Fatty Acid and Sugar Contents of Pepper Seeds (Capsicum annuum L.) in Relation to Seed Development and Drying Temperatures

This study was carried out in order to determine the effects of drying temperature (25, 35, and 45 °C) and the developmental stage (55, 65, 75, and 85 days after anthesis (DAA)) on germination, vigor, and the sugar (sucrose, glucose, fructose) and fatty acid contents of pepper seeds (Capsicum annuum L.) over 2 consecutive years. In seeds harvested at 75 DAA and after, seed viability and vigor were not influenced by drying at temperatures up to 45 °C. Linoleic acid (18:2) was the main fatty acid in pepper seeds, comprising 75-80% of total fatty acids. It was followed by oleic (18:1) and palmitic (16:0) as roughly 10%-12% and stearic (18:0) as 3%. The results indicated that drying seeds at different temperatures does not change fatty acid composition. Approximately 30% of the pepper seeds are constituted of sucrose, and this did not change with maturity level between 55 and 85 DAA, nor did it change at different drying temperatures. However, the levels of fructose and glucose gradually decreased as the developmental stage advanced and both were lower than 4% of total sugar at the final harvest. Seeds dried at 45 °C had lower amounts of sugar compared to those dried at 25 and 35 °C. Seed quality and fatty acid and sucrose composition do not change as long as the seeds are harvested within 75 DAA.

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  • Black, M., F. Corbineau, H. Gee and D. Come. 1999. Water content, raffinose and dehydrins in the induction of desiccation tolerance in immature wheat embryos. Plant Physiol. 120: 463-471.
  • Chen, Y. and J.S. Burris. 1990. The role of carbohydrates in the desiccation tolerance and membrane behaviour in maturing maize seeds. Crop Sci. 30: 971-975.
  • Corbineau, F., M.A. Picard, A. Fougerex, F. Ladonne and D. Come. 2000. Effects of dehydration conditions on desiccation tolerance of developing pea seeds as related to oligosaccaride content and cell membrane properties. Seed Sci. Res. 10: 329-339.
  • Demir, İ. and R.H. Ellis. 1992. Development of pepper seed quality. Ann. App. Biol. 121: 385-399.
  • Demir, İ. 2002. The effect of controlled hydration treatment on germination and seedling emergence of unaged and aged pepper seeds during development. Israel J. Plant Sci. 50: 251-257.
  • Hampton, J.G. and D.M TeKrony. 1995. Handbook of vigor test methods. International Seed Testing Association, Zurich. pp. 330.
  • ISTA 1996. International rules for seed testing (ISTA rules and Annexes). Seed Science and Technology. 24: Supplement.
  • IUPAC, 1987. Standard Methods for Analyses of Oils, Fats and Derivates, International Union of Pure and Applied Chemistry, 7th edn., Blackwell Scientific Publications, IUPAC Method. Vol. 2, pp. 301.
  • Kermode, A R. and J.D. Bewley, 1989. Developing seeds of Ricinus communis when detached and maintained in an atmosphere of high relative humidity, switch to a germinative mode without the requirement of complete desiccation. Plant Physiol. 90: 702-707.
  • Martiner-Force, E., R. Alarez-Ortega, S. Cantisan and R. Garces. 1998. Fatty acid composition in developing high saturated sunflower (Helianthus annuus) seeds: Maturation changes and temperature effect. J. Agric. Food Chem. 46: 265-275.
  • Sinniah, U.R., R.H. Ellis and P. John. 1998. Irrigation and seed quality development in rapid-cycling Brassica: Soluble carbohydrates and heat-stable proteins. Ann. Bot. 82: 647-655.
  • Thompson, G.A., and C. Li. 1997. Altered fatty acid composition and membrane lipids in seeds and seedling tissue of high-saturate canolas. In: Williams J.P., M.U. Khan, N.W. Lem (Eds.): Physiology, biochemistry and molecular biology of plant lipids. Kluwer Academic Publishers, Boston. 313-315.
  • Wang, T., T. Harp, E.G. Hammond, J.S. Burris and W.R. Fehr. 2000. Seed physiological performance of soybeans with altered saturated fatty acid contents. Seed Sci. Res. 11: 93-97.
  • Welbaum, G.E. and K.J. Bradford. 1989. Water relations of seed development and germination in muskmelon (Cucumis melo L.). II. Development of germinability, vigor and desiccation tolerance. J. Exp. Bot. 40: 1355-1362.
  • Xu, G. and U. Kafkafi. 2003. Seasonal differences in mineral content distribution and leakage of sweet pepper seeds. Ann. App. Biol. 143: 45-52.
Turkish Journal of Agriculture and Forestry-Cover
  • ISSN: 1300-011X
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
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