Parthenocarpic fruit set in triploid watermelon induced by CPPUand 2,4-D applications

Abstract

The localized application of the synthetic cytokinin CPPU ((2-chloro-4-pyridyl)-N-phenyl urea) to ovaries at flower opening was as effective as free pollination in setting parthenocarpic fruit in the triploid watermelon cultivar ‘Reina de Corazones’, and increased yield per unit land area by at least 50%, simply due to the lack of requirement for diploid pollen producing plants within the orchard. The application of the synthetic auxin 2,4-D (2,4-dichlorophenoxy acetic acid) as a full coverage spray, was also effective in setting fruit; total yield was however 10% smaller than in the CPPU-treated plots, but the cost of application was much less expensive. These applications had no adverse effect on fruit quality, and their effectiveness in commercial watermelon production was evaluated over 4 years. Localized applications of 2,4-D to ovaries were less effective in setting fruit, and increased hollow fruit.

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References

  1. 1.

    Y. Hayata Y. Niimi N. Iwasaki (1995) ArticleTitleSynthetic cytokinin – 1-(2-chloro-4 pyridyl)-3-phenylurea (CPPU) – promotes fruit set and induces parthenocarpy in watermelon J. Am. Soc. Hort. Sci. 20 997–1000

    Google Scholar 

  2. 2.

    Y. Hayata Y. Niimi K. Inoue S. Kondo (2000) ArticleTitleCPPU and BAwith and without pollination, affect setgrowthand quality of muskmelon fruit HortScience 35 868–870

    Google Scholar 

  3. 3.

    Y. Kano (2000) ArticleTitleEffects of CPPU treatment on fruit and rind development of watermelons (Citrullus lanatus Matsum et Nakai) J. Hort. Sci. Biotechnol. 75 651–654

    Google Scholar 

  4. 4.

    Y. Kondou M. Murozono (1975) ArticleTitleStudy of artificial fruit setting of watermelon Abstr. Jpn. Hort. Sci. 44 178–179

    Google Scholar 

  5. 5.

    S. López-Galarza A. San Bautista M. Perez A. Miguel C. Baixauli B. Pascual J.V. Maroto J.L. Guardiola (2004) ArticleTitleEffects of grafting and cytokinin-induced fruit setting on colour and sugar-content traits in glasshouse-grown triploid watermelon J. Hort. Sci. Biotechnol. 79 971–976

    Google Scholar 

  6. 6.

    J.V. Maroto (2002) Horticultura Herbácea Especial Mundi-Prensa Madrid 562

    Google Scholar 

  7. 7.

    J.V. Maroto A. Miguel F. Pomares (1996) El cultivo de la sandía Cuadernos de Agricultura 3 Fundación Caja Rural ValenciaValencia

    Google Scholar 

  8. 8.

    D.N. Maynard (1989) ArticleTitleTriploid watermelons: a new version of an old crop Am. Veg. Grow. 37 42–43

    Google Scholar 

  9. 9.

    A. Miguel J.V. Maroto (2000) Nuevas técnicas en el cultivo de la sandía (Citrullus lanatus (Thun.) Matsum. and Nakai) Consellería de Agricultura Pesca y Alimentación de la Generalitat Valenciana y Fundación Caja Rural ValenciaValencia 37–38

    Google Scholar 

  10. 10.

    A. Miguel J.V. Maroto A. San Bautista C. Baixauli V. Cebolla B. Pascual S. López J.L. Guardiola (2004) ArticleTitleThe grafting of triploid watermelon is an advantageous alternaive to soil fumigation by methyl bromide for control of Fusarium wilt Sci. Hort. 103 9–17 Occurrence Handle10.1016/j.scienta.2004.04.007

    Article  Google Scholar 

  11. 11.

    H. Miyazaki (1965) ArticleTitleStudy of parthenocarpy of watermelon. I. Effect of plant hormone on parthenocarpy of watermelon Bul. Miyazaki Agric. Coll. 1 3–8

    Google Scholar 

  12. 12.

    E. Primo P. Cuñat (1968) Herbicidas y fitorreguladores Aguilar Madrid 232–239

    Google Scholar 

  13. 13.

    InstitutionalAuthorNameSAS Institute (1989) SAS/STAT User’s Guide. Ver 6 SAS Institute Inc. Cary, NC, USA

    Google Scholar 

  14. 14.

    T. Terada K. Masuda (1940) ArticleTitleParthenocarpy of watermelon by hetero auxin Agr. Hort. 15 458–468

    Google Scholar 

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Correspondence to S. Lopez-Galarza.

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Maroto, J., Miguel, A., Lopez-Galarza, S. et al. Parthenocarpic fruit set in triploid watermelon induced by CPPUand 2,4-D applications. Plant Growth Regul 45, 209–213 (2005). https://doi.org/10.1007/s10725-005-3992-x

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Keywords

  • Citrullus lanatus
  • Fruit quality
  • Fruit set
  • Fruit yield
  • Growth regulators
  • Triploid watermelon