Journals / EurAsian Journal of BioSciences (elektronik) / 2007 / Sayı: 1
Arpa ve turp tohumlarının çimlenmesi sırasında çeşitli büyüme teşvik edicileri ve absisik asit arasindaki antagonizmalarin karşılaştırılmasi
- Issue
- 2007 · Sayı: 1
- Pages
- 11–21
- DOI
- —
Abstract
In this work, antagonism among abscisic acid preventing seedling growth and germination of barley and radish seeds and gibberellic acid, kinetin, benzyladenine, ethylene, brassinosteroid, triacontanol and polyamines (cadaverine, putrescine, spermidine, spermine) was studied. Although many stimulators mentioned were not able to overcome the radicle elongationpreventive effect of abscisic acid, the seeds reached 100% germination in this hormone medium. In the seedlings of barley, only benzyladenine, kinetin and gibberellic acid alleviated abscisic acid inhibition on coleoptile emergence and elongation. As for radish, all the stimulators except triacontanol could not overcome abscisic acid inhibition of hypocotyl elongation, while they promoted hypocotyl emergence. The barrier of abscisic acid on the fresh weight of the seedlings was passed by all the stimulators at varying levels. But, only benzyladenine was partly successful in the case of radish.
Özet
u calismada arpa ve turp tohumlarinin cimlenme ve fide buyumesini engelleyen absisik asit ile gibberellik asit, kinetin, benziladenin, etilen, brassinosteroit, triakontanol ve poliaminler (kadaverin, putressin, spermidin, spermin) arasindaki antagonizma incelenmistir. Soz konusu tesvik edicilerin bircogu absisik asitin radikula uzamasi uzerindeki engelleyici etkisini ortadan kaldirmada basarisiz olmalarina ragmen, bu hormon ortaminda tohumlar %100 cimlenme gostermislerdir. Arpa fidelerinde sadece benziladenin, kinetin ve gibberellik asit koleoptil cikisi ve uzamasi uzerindeki absisik asit engellemesini hafifletmistir. Turpta ise, triakontanol disindaki tum tesvik ediciler hipokotil uzamasi uzerindeki absisik asit engellemesini ortadan kaldiramamalarina ragmen, hipokotil cikisini tesvik etmislerdir. Fidelerin taze agirligi uzerindeki absisik asit engellemesi tum tesvik ediciler tarafindan cesitli duzeylerde hafifletilmistir. Fakat turpta sadece benziladenin kismen basarili olmustur.