Öz

Bu araştırmada fasulye bitkisinin vejetatif organlarının (kök, gövde ve yaprak) soğuğa dayanıklılığı üzerine CaCI2 ve KCI (0.025, 0.05 and 0.1 M)’nin etkileri kontrollü üşüme testleriyle araştırıldı. Fideler, sulama suyuna CaCI2 ve KCI ilave edildikten sonra 1 gün boyunca aklime (150C ışık: 100C karanlık,14 saat ışık: 10 saat karanlık) edildi. Daha sonra fideler 9 gün boyunca üşüme sıcaklıklarına (CTs) (10/5oC) maruz bırakıldı. 0.05 M KCI ve 0.025 M CaCI2 gövde uzamasını teşvik ettiği belirlendi. Nisbi Kuru ağırlık (RDW) genellikle kök ve gövdede tüm CaCI2 ve KCI uygulamaları tarafından azaltıldı, ama RDW bu uygulamalar tarafından yaprakta artırıldı (0.05 M KCI hariç). 0.1 M CaCI2 uygulaması ise RDW’ı bütün organlarda artırdı. 0.1 M CaCI2 uygulamasının her üç organda çözünebilir protein miktarını (SPtC) artırdığı belirlendi. Proline içeriği (PlC) bazı uygulamalar tarafından artırılırken, bazıları tarafından azaltıldı. Gövde canlılığının tüm uygulamalar tarafından azaltılmasına karşın, bazı uygulamalar (kök için 0.025 M KCI, yaprak için 0.025 M KCI, 0.1 and 0.05 M CaCI2 ) tarafından kök ve yaprak canlılığı artırıldı. Biz, bu araştırmada, sağlanabilen direnç cok az olsa bile, belirli KCl ve CaCl2 (0.025 M KCI, 0.025 M KCI, 0.1 ve 0.05 M CaCI2) uygulamalarının üşümeye hassas olan fasulyeye direnç sağlamada kullanılabileceğini önermekteyiz.

Anahtar Kelimeler

• Üşümeye direnç, Canlılık, KCl, CaCl2, Fasulye, Phaseolus vulgaris

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