The effects of different salt concentrations on growth and chlorophyll content of some pumpkin rootstocks

Abstract

This study was conducted to determine the effects of different salinity levels, (0.7, 4.0, 8.0, 12.0, 16.0 dS m^-1) on some physiological parameters of Obez F₁, Ferro F₁, RS841 F₁, which are used as rootstocks in watermelon cultivation. Salty irrigation water was obtained through mixing of NaCl and CaCl₂ salt into tap water. When the plants were at the 3-4 leaf stage, different salinity levels were applied. Plants were harvested during the phase of florescence. The study was carried out using split plots in randomized complete block design while rootstocks are main plot, salinity levels are sub-plot with three replications. While the salinity level was increasing, the physiological parameters decreased in each three rootstocks. While the plant height changed between 14.4-107.1 cm, the plant leaf area varied between 152.0-2182.7 cm². Chlorophyll-a, chlorophyll-b and total carotenoid values decreased as the salinity level increased. Excluding the maximum value obtained from control plot, the highest chlorophyll-a, chlorophyll-b, and total carotenoid values were obtained in Obez variety under 4.0 dS m^-1 application with 14.8 mg l^-1, 12.8 mg l^-1 and 0.28 mg g^-1 fw, respectively.

Keywords

• Salinity; Pumpkin; Water quality; Chlorophyll; Carotenoid

Farklı tuz konsantrasyonlarının bazı kabak anaçlarının büyüme ve klorofil içerikleri üzerine etkisi

Abstract

Bu çalışma, farklı tuzluluk seviyelerinin (0.7, 4.0, 8.0, 12.0, 16.0 dS m^-1) karpuz yetiştiriciliğinde anaç olarak kullanılan bazı ticari hibrit kabak çeşitlerine ait (Obez F₁, Ferro F₁, RS841 F₁) fizyolojik parametreler üzerindeki etkilerini belirlemek amacıyla yürütülmüştür. Tuzlu sulama suları; NaCl ve CaCl₂ tuzlarının şebeke suyuna karıştırılmasıyla elde edilmiştir. Bitkiler 3-4 yapraklı döneme geldikten sonra farklı tuzluluk seviyelerinin uygulamasına geçilmiştir. Bitkiler çiçeklenme aşamasında hasat edilmiştir. Tesadüf bloklarında bölünmüş parseller deneme deseninde yürütülen araştırmada anaçlar ana konu iken, sulama suyu tuzluluk seviyeleri ise alt konuları oluşturmuş ve her konu 3 kez tekrarlanmıştır. Üç anaçta da, tuzluluk seviyesi arttıkça fizyolojik parametrelere ait değerlerin azaldığı belirlenmiştir. Kontrol ve tuz uygulamaları birlikte değerlendirildiğinde, bitki boyları 14.4-107.1 cm arasında değişirken, bitki yaprak alanları 152.0-2182.7 cm² arasında ölçülmüştür. Klorofil-a, klorofil-b ve toplam karotenoid değerlerinin tuzluluk seviyesi arttıkça azaldığı belirlenmiştir. En yüksek klorofil ve karotenoid ölçümlerinin elde edildiği kontrol uygulaması hariç tutulduğunda, en yüksek klorofil-a, klorofil-b ve toplam karotenoid değerleri sırasıyla 14.8 mg l^-1, 12.8 mg l^-1 ve 0.28 mg g^-1 fw ile Obez F₁ çeşidinin 4.0 dS m^-1 dozundaki tuz uygulamasından elde edilmiştir.

Keywords

• Tuzluluk; Kabak; Su kalitesi; Klorofil; Karotenoid

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