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TUZ STRESİ (NaCl) ALTINDA ÇİMLENDİRİLEN ARPA TOHUMLARININ MİTOTİK İNDEKS VE KROMOZOM ANORMALLİKLERİ ÜZERİNE BAZI BİTKİ BÜYÜME DÜZENLEYİCİSİ KOMBİNASYONLARININ ETKİLERİ

EFFECTS OF COMBINATIONS OF SOME PLANT GROWTH REGULATORS ON MITOTIC INDEX AND CHROMOSOMAL ABERRATIONS OF BARLEY SEEDS GERMINATED UNDER SALINE (NaCl) CONDITIONS

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Abstract (2. Language): 
In this work, the effects of double, triple and quadruple combinations of gibberellic acid (GA3), kinetin (Kin), benzyladenine (BA), 24-epibrassinolide (EBR), ethylene (E) polyamines (cadaverine, putrescine, spermidine, spemine) on the mitotic index and chromosomal abberations of barley seeds (Hordeum vulgare L. var. Bülbül 89) germinated under saline conditions were studied. In paralel to the rises in salt concentrations rise, mitotic activity significantly decreased and percantage of chromosomal abberation increased. Most of the plant growth regulator combinations studied showed positive effect on mitotic activity in high salt concentrations. Besides, most of this growth regulators were succesful in alleviating of the negative effect of percantage of chromosomal abberation in all the salt levels. Consequently, it was determined that plant growth regulator combinations mentioned affected in different degrees on mitotic index and chromosomal abberations of barley seeds and this difference was statistically important.
Abstract (Original Language): 
Bu çalışmada tuz stresi altında çimlendirilen arpa tohumlarının (Hordeum vulgare L. var. Bülbül 89) mitotik indeks ve kromozom anormallikleri üzerine gibberellik asit (GA3), kinetin (Kin), benziladenin (BA), 24-epibrassinolid (EBR), etilen (E) ve poliamilerin (kadaverin-Kad, putressin-Put, spermidin-Spd, spemin-Spm) ikili, üçlü ve dörtlü kombinasyonlarının etkileri araştırılmıştır. Tuz konsantrasyonunun artışına paralel olarak mitotik aktivite önemli ölçüde azalmış ve kromozom anormallik yüzdesi artmıştır. Çalışılan büyüme düzenleyicisi kombinasyonlarının büyük bir çoğunluğu yüksek tuz konsantrasyonlarında mitotik aktivitesi üzerinde olumlu bir etki göstermiştir. Ayrıca bu büyüme düzenleyicilerinin büyük bir çoğunluğu tüm tuz seviyelerinde kromozom anormallik yüzdesi üzerindeki olumsuz etkiyi önemli ölçüde hafifletmiştir. Sonuç olarak, söz konusu bitki büyüme düzenleyicisi kombinasyonlarının arpa tohumlarının mitotik indeks ve kromozom anormallikleri üzerinde farklı derecelerde etkili oldukları ve bu farkın istatistiksel açıdan önemli olduğu tespit edilmiştir
162-173

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