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 Citrus and Other Subtropical Products Research: Fort Pierce, FL
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ARS Home Southeast Area Fort Pierce, Florida U.S. Horticultural Research Laboratory Citrus and Other Subtropical Products Research Research Publications at this Location





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Title:   Author  item
                                            SITTHER, VIJI - Fort Valley State Universityitem
                                            HARRIS, DONNA - Fort Valley State Universityitem
                                            DHEKNEY, SADANAND - Fort Valley State Universityitem
                                            Bai, Jinheitem
                                            Baldwin, Elizabeth

                                                         - *Liz*item
                                            YADAV, ANAND - Fort Valley State University
  Submitted to: International Journal Food Safety, Nutrition and Public Health
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 9/21/2011
                                    Publication  Date: 12/20/2011
                                    Citation: Sitther, V., Harris, D.L., Dhekney, S., Bai, J., Baldwin, E.A., Yadav, A. 2011. Total phenol content of guava fruit and development of an in vitro regeneration protocol amenable to genetic improvement. International Journal Food Safety, Nutrition and Public Health. 4:225-236.Interpretive Summary: Guava fruit are considred very nutritous due to their high vitamin C, fiber and antioxidants. Seven guava varieties, including pink- and white-fleshed guava were studied for ability to propogate (reproduce) in a Souther US climate. Antioxidant compounds were also measured.
                                Technical Abstract: Total soluble phenolics in two white (‘Allahabad Safeda’ and ‘Lucknow-49’), two pink (‘Beaumont’ and ‘Gushiken Sweet’), and three red fleshed (‘Ka Hua Kola’, ‘Ruby Supreme’ and ‘Red Fleshed’) guava (Psidium guajava. L.) fruits were assessed using the Folin-Ciocalteu procedure. ‘Allahabad Safeda’ and ‘Ruby Supreme’ contained the highest level of phenols (1967.5 and 1921.25 μg/g gallic acid equivalents. No significant difference in phenolic content was observed between white and red fleshed guava fruits. An in vitro method was developed for clonal propagation of ‘Lucknow-49’ and ‘Gushiken Sweet’ cultivars. Five concentrations of 6-benzylaminopurine (BAP) and kinetin (KIN) plant growth regulators were tested for in vitro regeneration. A maximum of 4.5 shoots per explant was produced on Murashige and Skoog medium supplemented with 8.9 μM BAP + 9.4 μM KIN. These studies indicate that guava, a rich source of natural phenolic antioxidants can be efficiently micropropagated for genetic studies to enhance its nutraceutical value.


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