Effect of Different Hydrogel Dosage Treatments on the Development and Quality of Gerbera jamesonii Plants under Different Salt Stress

Öz

This study was carried out to determine the effects of hydrogel applications on plant development of white Gerbera (Gerbera jamesonii (Gerbera colorbloom white dark eye) flowers grown in pots with different salinity levels under greenhouse conditions. The experimental subjects were 4 different salinity (NaCl) levels [EC₁: tap water (0.26 dS.m⁻¹), EC₂: 3.7 dS.m⁻¹, EC₃: 5.7 dS.m⁻¹, EC₄: 8.7 dS.m⁻¹)] and 2 different hydrogel (H₁: 5.0 g/pot and H₀: 0.0 g/pot) doses. According to the research results; plants could not survive at EC₄ salinity level. Increasing salt stress negatively affected the plants, causing their death. Leaf number, root length, root fresh and root dry weight values were determined to be higher in the control group plants, and positive effects of H₁ application were determined in reducing the negative effects seen in plants irrigated with saline water at EC₂ level. In this context, it was concluded that adding 5 g of hydrogel to the growing medium was the most effective application in reducing the negative effects of salt stress determined in plants irrigated with water containing EC₂: 3.7 dS.m⁻¹. In addition, it was concluded that the hydrogel had no phytotoxicity on the plants grown at the end of the experiment, and that the negative effects of salt on the growth and quality of plants in the experiment groups irrigated with different salt levels and with hydrogel added to the growing medium could be reduced. These results showed that the synthesized hydrogel could be a very good absorbent and could contribute to the plant being less affected by salt stress by absorbing the salt in the growing medium.

Anahtar Kelimeler

• Hydrogel
• dimethyl acrylamide
• potted gerbera
• salt stress

Farklı Tuz Stresi Altındaki Gerbera jamesonii Bitkilerinin Gelişimi ve Kalitesi Üzerine Farklı Hidrojel Dozu Uygulamalarının Etkisi

Öz

Bu çalışma, sera koşullarında farklı tuzluluk seviyelerindeki saksılarda yetiştirilen beyaz renkli Gerbera (Gerbera jamesonii (Gerbera colorbloom white dark eye) çiçeklerinin bitki gelişimi üzerine hidrojel uygulamalarının etkilerini belirlemek amacıyla yürütülmüştür. Deneme konularını 4 farklı tuzluluk (NaCl) seviyesi [EC₁: çeşme suyu (0,26 dS/m), EC₂: 3,7 dS/m, EC₃: 5,7 dS/m, EC₄: 8,7 dS/m)] ve 2 farklı hidrojel (H₁: 5.0 g/saksı ve H₀: 0.0 g/saksı) dozu oluşturmuştur. Araştırma sonuçlarına göre; EC₄ tuzluluk düzeyinde bitkiler yaşayamamıştır. Artan tuz stresi bitkileri olumsuz etkilemiş, ölümlerine neden olmuştur. Yaprak sayısı, kök uzunluğu, kök yaş ve kök kuru ağırlık değerleri kontrol grubu bitkilerinde daha yüksek tespit edilmiş, EC₂ düzeyinde tuzlu su ile sulanan bitkilerde görülen olumsuz etkilerin azaltılmasında H₁ uygulamasının olumlu etkileri tespit edilmiştir. Bu bağlamda EC₂: 3,7 dS.m⁻¹ içeren su ile sulanan bitkilerde belirlenen tuz stresinin olumsuz etkilerinin azaltılmasında 5 g hidrojelin yetiştirme ortamına ilave edilmesinin en etkili uygulama olduğu sonucuna varılmıştır. Ayrıca, deneme sonunda yetiştirilen bitkiler üzerinde hidrojelin fitotoksisitesinin olmadığı, farklı tuz düzeyleri ile sulanan ve yetiştirme ortamına hidrojel eklenen deneme gruplarındaki bitkilerin büyümesinde ve kalitesinde tuzun olumsuz etkilerinin azaltılabileceği sonucuna da varılmıştır. Bu sonuçlar sentezlenen hidrojelin çok iyi bir absorban olabileceğini ve yetiştirme ortamında bulunan tuzu bünyelerine emerek bitkinin tuz stresinden daha az etkilenmesine katkıda bulunabileceğini göstermiştir.

Anahtar Kelimeler

• Hidrojel
• dimetil akrilamit
• saksılı gerbera
• tuz stresi.

Kaynakça

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