Su Stresinin Hidroponik Ortamda Yetiştirilen Pamuk Fidelerinin Bitkisel Özelliklerine Etkisinin Belirlenmesi

Öz

Bu çalışmanın amacı, yapay olarak oluşturulan su stresinin hidroponik ortamda yetiştirilen pamuk bitkisinin kök ve yeşil aksam gelişimi ile klorofil içeriğine etkilerini belirlemektir. Deneme polietilen glikol (PEG) 6000 ile oluşturulmuş 2 farklı su stresi (kontrol % 0 ve % 1.6) içeren hidroponik ortamda 10 farklı pamuk çeşidi ile tesadüf parselleri deneme desenine göre iki faktörlü ve 4 tekrarlamalı olarak yürütülmüştür. Bitkiler bitki büyütme kabininde 16/8 saat fotoperiyot, 30/22 oC (gündüz/gece) sıcaklık ve % 50±2 nem koşullarında yetiştirilmiş ve 21 gün sonunda bitkilerde gözlem ve ölçümler alınarak tamamlanmıştır. Araştırmada su stresinin bitkide kök uzunluğu, gövde uzunluğu, kök/gövde oranı, kök yaş ağırlığı, gövde yaş ağırlığı, kök kuru ağırlığı, gövde kuru ağırlığı, kök yüzey alanı ve yaprak alanını olumsuz yönde etkilediği, stres koşullarının bitkide sadece klorofil içeriği değerini arttırdığı tespit edilmiştir. Çeşitler arasında SJU-86 ve Edessa çeşitlerinin incelenen özellikler bakımından öne çıktığı, klorofil içeriği bakımından ise Solmaz çeşidinin yüksek değer gösterdiği belirlenmiştir. Bu araştırma ile SJU-86 ve Edessa çeşitlerinin su stresi koşullarında üstün performans gösterdikleri ve diğer çeşitlere göre daha tolerant oldukları sonucuna varılmıştır.

Anahtar Kelimeler

• Pamuk
• su stresi
• hidroponik ortam
• fizyoloji
• polietilen glikol

Determination of the Effect of Water Stress on Plant Characteristics of Cotton Seedlings Grown in Hydroponics

Öz

The aim of this study was to determine the effects of artificially induced water stress on root and green development and chlorophyll content of cotton plants grown in hydroponics. The experiment was carried out with 10 different cotton varieties in hydroponic environment containing 2 different water stresses (control 0% and 1.6%) created with polyethylene glycol (PEG) 6000 according to a randomized plot design with two factors and 4 replications. Plants were grown in a plant growth chamber under 16/8-hour photoperiod, 30/22 oC (day/night) temperature and 50±2% humidity conditions and observations and measurements were taken on the plants at the end of 21 days. In the research, it was determined that water stress negatively affected root length, stem length, root/stem ratio, root weight, stem weight, root dry weight, stem dry weight, root surface area and leaf area, while stress conditions only increased the chlorophyll content value in the plant. Among the varieties, SJU-86 and Edessa varieties were determined to be prominent in terms of the examined characteristics, while Solmaz variety showed high value in terms of chlorophyll content. With this research, it was concluded that SJU-86 and Edessa varieties showed superior performance in terms of water stress conditions and were more tolerant than other varieties.

Anahtar Kelimeler

• Cotton
• water stress
• hydroponic medium
• physiology
• polyethylene glycol

Kaynakça

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