Relationship between salinity stress and ion uptake of hyacinth (Hyacinthus orientalis)

Yıl 2014, Cilt: 1 Sayı: Özel Sayı-1, 578 - 583, 01.03.2014

Nezihe Koksal Ilknur Kulahlıoglu Ebru Ertargın Ayfer ALKAN Torun

Öz

Salinity is one of the most severe environmental factors limiting the agricultural productivity. Salt stress is also of rising importance in landscaping. Salinity is a reality in coastal area and in countries where de-icing salts are applied to roadways. Plants are affected in a different way by amount of salt and depending on their growth and development stage. Major saline ions can affect nutrient uptake which may cause reductions in plant growth. Hyacinth (Hyacinthus orientalis L.) is grown worldwide as a commercially important bulbous ornamental plant. In this study the effect of salt stress on ion uptake of hyacinth plants were investigated. The plants were irrigated with different NaCl concentration by the addition of 0, 25, 50, 75, 100, 200, 400 and 600 mM for 15 days with two days intervals in soil medium under controlled conditions. Salt treatments were imposed to plants at the beginning of flowering stage. According to the results Na+ uptake were significantly increased by salt stress. The higher concentration of NaCl treatments (75 mM and upper) caused sharply reduction on K+/Na+ and Ca2+/Na+ ratios. This study showed that measuring of Na+ concentrations and calculating the ratios of K+/Na+ and Ca+2/Na+, in leaf tissue are reliable physiological parameters for predicting salt damage of hyacinth plant

Anahtar Kelimeler

Salinity, hyacinth, ion concentrations, bulbous plant

Relationship between salinity stress and ion uptake of hyacinth (Hyacinthus orientalis)

Öz

Tuzluluk tarımsal verimliliği sınırlayan en ciddi çevresel faktörlerden biridir. Tuz stresinin önemi peyzaj düzenlemelerinde de giderek artmaktadır. Tuzluluk, deniz kıyısındaki bölgelerin ve yol buzlanmalarına karşı tuz uygulamasının yapıldığı ülkelerin önemli bir gerçeğidir. Bitkiler tuz stresinden stresin şiddeti ve bitkinin büyüme ve gelişme aşamasına bağlı olarak farklı şekillerde etkilenmektedir. Tuzluluğa yol açan iyonları, bitki besin elementi alımını etkileyerek bitki büyümesinde azalmaya yol açabilmektedir.Sümbül (Hyacinthus orientalis L.) ticari olarak önemli bir soğanlı süs bitkisi olarak dünya çapında yetiştirilmektedir. Bu çalışmada sümbül bitkisinin iyon alımı üzerine tuz stresinin etkisi araştırılmıştır.Bitkiler, kontrollü koşullar altında, toprak ortamında 0, 25, 50, 75, 100, 200, 400 ve 600 mM tuz konsantrasyonu ile iki gün aralıklarla 15 gün süre boyunca sulanmıştır.Tuz uygulamaları bitkilere çiçeklenme döneminin başında uygulanmıştır. Sonuçlara göre, tuz stresinin artışı ile Na+ alımı önemli ölçüde artmıştır. Yüksek NaCI uygulamaları (75 mM ve üstü) K+/Na+ ve Ca2+/Na+ oranlarında keskin bir düşüşe neden olmuştur.Bu çalışma, yaprak dokularında Na+ konsantrasyonunun ölçülmesi ve K+/Na+ ve Ca2+/Na+ oranlarının hesaplamasının sümbül bitkisinde tuz zararının tahmin edilmesinde için güvenilir fizyolojik parametreler olduğunu göstermektedir

Anahtar Kelimeler

Tuzluluk, sümbül, iyon konsantrasyonu, soğanlı bitki

Kaynakça

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