Avtor/Urednik		Paradiž, Jasna
Naslov		Assessment of damage to irradiated onion (Allium cepa L.) by cytogenetic analyses
Prevedeni naslov		Ocena poškodovanosti obsevanih čebul (Allium cepa L.) z citogenetsko analizo
Tip		članek
Vir		Acta Pharm Zagreb
Vol. in št.		Letnik 48, št. 3
Leto izdaje		1998
Obseg		str. 167-78
Jezik		eng
Abstrakt		We studied the effect of the radiation dose on the growth rate, mitotic activity and chromosomal aberrations after onions were irradiated and subsequently grown both under laboratory and field conditions. Biological effects of acute radiation under laboratory conditions cannot be measured on the basis of chromosomal aberrations in plant meristems only. A complete mitotic blockade in irradiated onions grown under field conditions was a key cytogenetic indicator of their potential viability. However, almost normal mitotic activity in roots and decreasing chromosomal aberrations in the prolonged growth period were the two indications of onion viability. It is not just the extent of the clastogenic effects in root meristems, but rather the meristem ability to cope with them, which is the important factor in plants in natural environment.
Izvleček		Proučili smo učinke sevanja na rast, celično aktivnost in obseg kromosomskih poškodb v meristematskih celicah pri obsevanih koreninah in čebulicah čebule (Allium cepa L.). Rezultati so pokazali, da samo z analizo kromosomskih aberacij v rastlinskih meristemih ne moremo zanesljivo oceniti vseh bioloških učinkov sevanja. Najizrazitejša opazena citogenetska indikacija vpliva sevanja na vitalnost rastlin je bila blokada mitotske aktivnosti celic. Preživetje rastlin, obnovitev mitotske aktivnosti in zmanjšanje števila kromosomskih aberacij dalj časa po obsevanju kažejo na možnosti naravnega odpravljanja kromosomskih poškodb oziroma eliminacijo poškodovanih celic.
Deskriptorji		ALLIUM CHROMOSOME ABERRATIONS MITOTIC INDEX PLANT ROOTS RADIATION DOSAGE