The effect of priming treatments on the performance of watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai) seeds under temperature and osmotic stress

DEMİR İ., van de Venter H.

SEED SCIENCE AND TECHNOLOGY, cilt.27, sa.3, ss.871-875, 1999 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 3
  • Basım Tarihi: 1999
  • Dergi Adı: SEED SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.871-875
  • Ankara Üniversitesi Adresli: Evet

Özet

Watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai) seeds were subjected to osmoconditioning (2% KNO3, 20 degrees C, 6 d) or hydropriming (30 degrees C, 18 h) and incubated at 15, 25 and 38 degrees C. Mean time to germination was decreased and germination increased by both priming treatments at 15 degrees C with osmoconditioning being superior to hydropriming. However, neither osmoconditioning nor hydropriming treatment affected germination significantly at 25 and 38 degrees C. The effect of priming on root growth and on emergence from deep plantings was also assessed after synchronisation of radicle emergence between treatments to exclude the confounding effect of germination rate differences. Root growth was not significantly improved by priming but emergence at 15 degrees C was enhanced. It can be concluded from this result that improved emergence after priming is not due to the beneficial effect on radicle emergence only, but also to improved hypocotyl growth. Osmoconditioning increased germination under osmotic stress.