The Effects of Black Cumin (Nigella sativa L.) seed extract on the seed germination, seedling growth, mitotic activity and chromosomal aberrations of Allium cepa L. under saline condition

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In this work, the effects of black cumin seed extract (BCSE) on the seed germination, seedling growth (radicle length, radicle number and fresh weight), mitotic activity and chromosomal aberrations of Allium cepa L. germinated under both normal conditions and salt stress were studied. The radicle number of the seeds germinated in the medium with BCSE alone partly reduced in comparison with ones of the control seeds germinated in distilled water medium while their germination percentage, radicle length and fresh weight statistically showed the same values as the control. Furthermore, the mitotic index in root tip meristems of A. cepa seeds germinated in the medium with BCSE alone demonstrated a significant decrease according to ones of the control seeds germinated in distilled water medium while the frequency of chromosomal aberrations exhibited a significant increase according to the control. On the other hand, salt stress considerably inhibited the seed germination and seedling growth of A. cepa. Moreover, it markedly decreased the mitotic index in root tip meristems of the seeds and increased the number of chromosomal aberrations. Whereas, the inhibitive effects of salt on the seed germination and seedling growth were dramatically alleviated in varying degrees by BCSE application. But, it was ineffective in reducing of salt damage on the mitotic activity and chromosomal aberrations. 

Authors: 
Dilek Çavuşoğlu
Authors: 
Kürşat Çavuşoğlu
Authors: 
Selma Tabur
Publisher: 
ARPN Journal of Agricultural and Biological Science
Year: 
2018