THE EFFECTS OF PRETREATMENTS OF SOME PLANT GROWTH REGULATORS ON GERMINATION AND SEEDLING GROWTH OF RADISH SEEDS UNDER SALINE CONDITIONS

Abstract

The effects of gibberellic acid, kinetin, benzyladenine, ethylene, triacontanol, 24-epibrassinolide and polyamines

(cadaverine, putrescine, spermidine, spermine), alone or in combinations, on seed germination and seedling growth

(fresh weight, hypocotyl percentage, radicle and hypocotyl elongation) of radish under saline conditions were

studied. Although many of the growth regulator pretreatments alone carried out in overcoming of the negative

effect of 0.25 and 0.30 m salinity on the germination and hypocotyl pecentage or fresh weight, they were mostly

unsuccessful on the radicle and hypocotyl elongation. Moreover, the mentioned growth regulators were extremely

ineffective in alleviation of the inhibitive effect of 0.35 m salinity on these parameters. On the other hand, many of

the combination pretreatments carried out in overcoming of the negative effect of 0.35 m salinity on the

germination percentage and fresh weight, while they were mostly ineffective on the other parameters studied.

Keywords

• Plant Growth regulators,seedling growth,seed germination,radish,salt stress

TURP TOHUMLARININ TUZLU KOŞULLAR ALTINDAKİ ÇİMLENME VE FİDE BÜYÜMESİNE BAZI BİTKİ BÜYÜME DÜZENLEYİCİSİ ÖN UYGULAMALARININ ETKİLERİ

Abstract

Tuzlu koşullar altında turp’un tohum çimlenmesi ve fide büyümesine (taze ağırlık, hipokotil yüzdesi, radikula ve hipokotil uzaması) gibberellik asit, kinetin, benziladenin, etilen, triakontanol, 24-epibrassinolit ve poliaminlerin (kadaverin, putressin, spermidin, spermin) tek başına ve kombinasyon halindeki etkileri araştırılmıştır. Tek başına büyüme düzenleyicisi ön uygulamalarının büyük bir çoğunluğu 0.25 ve 0.30 m tuzluluğun çimlenme ve hipokotil yüzdesi ile taze ağırlık üzerindeki olumsuz etkisini ortadan kaldırmada başarılı olurken, radikula ve hipokotil uzaması üzerinde ekseriyetle başarısız olmuşlardır. Dahası, söz konusu büyüme düzenleyicileri 0.35 m tuzluluğun bu parametreler üzerindeki engelleyici etkisini hafifletmede ise son derece etkisiz olmuşlardır. Diğer yandan, kombinasyon ön uygulamalarının büyük bir çoğunluğu 0.35 m tuzluluğun çimlenme yüzdesi ve taze ağırlık üzerindeki olumsuz etkisini ortadan kaldırmada başarılı olurken, çalışılan diğer parametreler üzerinde ise çoğunlukla etkisiz olmuşlardır.

Keywords

• Bitki büyüme düzenleyicileri,fide büyümesi,tohum çimlenmesi,turp,tuz stresi

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