Tuzluluk stresi altında büyütülen ayçiçeği bitkilerine dışsal uygulanan poliaminlerin yaprak alanına etkisi

B u çalışmada kontrollu iklim koşullarında büyütülen ayçiçeği Helianthus annuus L. cv. Santafe bitkilerinin büyüme döneminde uygulanan dışssal poliaminlerin yaprak çiftleri ve total yaprak yüzey alanı üzerine etkileri çalışılmıştır. Çalışmada 3 farklı tuz derişimi 50, 100 ve 200 mM ile üç farklı düzeyde 0.01, 1 ve 2 mM putresin, spermin ve spermidin kullanılmıştır. Hoagland ve değişik konsantrasyonlardaki tuzlu kültür çözeltilerinde 45 gün büyütülen ayçiçeği bitkilerinin yaprak ve gövdelerine 15. günden itibaren 3`er gün arayla toplam 8 kez poliamin çözeltisi püskürtülmüştür.Total yaprak alanı ve yaprak çifti alanları artan tuz derişimine bağlı olarak azalmıştır. Bitkilere püskürtülen Spermin, Spermidin ve Putresin kültür ortamına eklenen tuz ve poliamin düzeyine bağlı olmak üzere sadece belirli ve sınırlı koşullarda olumlu etki gösterebilmiştir. Tuzun yaprak alanı üzerinde yapmış olduğu engelleyici etkiyi kaldırabilmek açısından en etkili poliamin Putresin olarak tespit edilmiştir

Anahtar Kelimeler:

Ayçiçeği, Tuz stresi, Poliaminler, Yaprak alanı

Effects of exogenous polyamines on leaf area of sunflower grown in salinity stress

This study investigated the effects of polyamines, which were applied exogenously in growth period of sunflo- wer Helianthus annuus L. cv. Santafe plants grown, under controlled conditions, on leaf pairs and total leaf surface area. Salt was used in 3 different concentrations 50, 100 and 200 mM NaCl and also, spermine, spermidine and putrescine was applied in 3 levels 0.01, 1 and 2 mM . The leaf and stems of sunflower plants grown in salt culture solutions in Hoagland and at various concentrations for 45 days were sprayed with polyamine solution every other 3 days and 8 times in total as from the 15th day.

Keywords:

Sunflower, Salt stress, Polyamines, Leaf area,

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