Effect of Priming on Germination of Lagenaria siceraria Genotypes at Low Temperatures

Abstract

This work was carried out to test whether germination of fifteen Lagenaria siceraria genotypes which were collected from western and southern parts of Turkey were improved by KNO3 and NaCl treatments. The experiment was conducted in two consecutive years, 2004 and 2005. Germination tests were performed at 15 0C and 18 0C. Results indicated that the effect of the treatments varied between the genotypes, temperatures and solutions that were used. KNO3 treatment was better and effective in larger number of lots than NaCl in both years. NaCl promoted germination in a few but inhibitive in large number of lots at both temperatures. As germination temperature was reduced, the positive effect of the KNO3 became greater. As a conclusion, priming treatments, specifically KNO3, appears to be promising in enhancing germination percentages of Lagenaria siceraria particularly at 15 C that is the prevailing temperature in rootstock production for grafted watermelon seedling in unheated glasshouse conditions in early spring. 0C that is the prevailing temperature in rootstock production for grafted watermelon

Keywords

• Lagenaria siceraria,priming,germination,low temperature

Lagenaria siceraria Genotiplerinin Düşük Sıcaklıkta Çimlenmesi Üzerine Ekim Öncesi Uygulamaların Etkisi

Öz

Bu çalışmada; Türkiye’nin batı ve güney bölgelerinden toplanan, 15 adet Lagenaria siceraria genotipine ait tohumlar KNO ve NaCl uygulamasına tabi tutularak çimlenme oranları araştırılmıştır. Araştırma, 2004-2005 yıllarında yürütülmüştür. Çimlendirme testleri, 15 C ve 18 0C sıcaklılarda yapılmıştır. Sonuçlar, uygulamaların etkisinin genotipler, sıcaklıklar ve kullanılan solüsyonlar arasında fark olduğunu göstermiştir. Birçok genotipte her iki yılda da, KNOuygulaması NaCl uygulamasına göre daha etkili ve iyi sonuç vermiştir. Her iki sıcaklıkta, NaCl az da olsa çimlenmeyi olumlu etkilemiştir; fakat, birçok genotipte çimlenmeyi engellemiştir. Çimlenme sıcaklığı düştükçe KNOuygulamasının pozitif etkisi daha iyi gözlenmiştir. Sonuç olarak; uygulamalar, özellikle de KNO3 uygulaması ile 15 0C sıcaklıkta, Lagenaria siceraria tohumlarının çimlenme yüzdesi arttırılmıştır. Belirtilen uygulama, erken ilkbahar döneminde ısıtmasız sera koşullarında aşılı karpuz fidesi için anaç üretiminde etkili şekilde kullanılabilir

Anahtar Kelimeler

• Lagenaria siceraria,ekim öncesi uygulamalar,çimlenme,düşük sıcaklık

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