African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

The mechanism of seedlessness in watermelon generated using soft-X-ray irradiated pollen

Hai-yong Qu
  • Hai-yong Qu
  • College of Horticulture, Qingdao Agricultural University, Qingdao City, Shandong province, China.
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Chaoyang Zhang
  • Chaoyang Zhang
  • Huaiyin Institute of Agricultural Sciences of Xuhuai Region In Jiangsu, No.104 Huaihai Road, Huaian City, Jiangsu Province, 223003, China.
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Yudong Sun
  • Yudong Sun
  • Huaiyin Institute of Agricultural Sciences of Xuhuai Region In Jiangsu, No.104 Huaihai Road, Huaian City, Jiangsu Province, 223003, China.
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  •  Received: 08 May 2015
  •  Accepted: 09 October 2015
  •  Published: 23 June 2016

Abstract

A new variety of seedless watermelon, with high sugar content, good taste, and easy storage has been developed using scanning electron microscopy (SEM) fluorescence staining, paraffin and 4',6-diamidino-2-phenylindole (DAPI) staining. The study investigated the mechanism behind the production of seedless watermelon after soft X-ray irradiation. The results showed that soft X-ray irradiation did not damage the cell walls of the watermelon pollen, and leading to normal pollination and fertilization. However, the chromosomal double helix of the watermelon pollen were damaged, thereby inhibiting embryotic developmental processes, leading to abortion of the embryo and degeneration of endosperm, which lead to the production of seedless watermelon. In conclusion, artificial pollination of pollen after soft X-ray irradiation can produce no seed watermelon, and the sugar content is higher than that of the seed watermelon.

Key word: Watermelon, X-ray, seedless.