Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia.
Budker Institute of Nuclear Physics of the Siberian Branch of the of Russian Academy of Sciences, Novosibirsk, Russia.
Int J Radiat Biol. 2021;97(2):276-281. doi: 10.1080/09553002.2021.1844337. Epub 2020 Nov 16.
The purpose of this study was to assess the long-term effects of gamma-radiation, including low-dose radiation, on growth parameters of onion () seedling roots 6-10 days after irradiation.
Onion seedlings were exposed to a Cs gamma source at doses ranging from 0.1 to 10 grays (Gy). Responses of root and shoot length growth were studied 6 and 10 days after irradiation.
Our results showed inhibition of the root and shoot length growth 6 days after exposure at all doses, including the low dose - 0.1 Gy. At a later point in time (day 10), root and shoot inhibition was only observed after irradiation at high doses (above 5 Gy), and that suggested the occurrence of cell repair after irradiation at low doses. The results indicated that the length of seedling roots was more sensitive to gamma-irradiation than the shoot length.
The results of the study suggested that short-term gamma-irradiation of onion seedlings (absorbed doses of 0.1-10 Gy) caused inhibition of plant growth 6 and 10 days after irradiation. The dose dependence of the onion root length was linear. The present study showed for the first time that short-term low-dose gamma-irradiation could induce long-term negative effects on plant growth.
本研究旨在评估伽马辐射（包括低剂量辐射）对洋葱（）幼苗根系在辐照后 6-10 天生长参数的长期影响。
洋葱幼苗暴露于 Cs 伽马源，剂量范围从 0.1 至 10 戈瑞（Gy）。研究了辐照后 6 天和 10 天根和茎长度生长的反应。
我们的结果表明，在所有剂量下，包括低剂量 - 0.1Gy，暴露 6 天后，根和茎的长度生长均受到抑制。在稍后的时间点（第 10 天），仅在高剂量（5Gy 以上）辐照后观察到根和茎的抑制，这表明低剂量辐照后发生了细胞修复。结果表明，幼苗根的长度对伽马辐射比茎的长度更敏感。
该研究结果表明，洋葱幼苗的短期伽马辐射（吸收剂量为 0.1-10Gy）在辐照后 6 天和 10 天导致植物生长抑制。洋葱根长的剂量依赖性呈线性。本研究首次表明，短期低剂量伽马辐射可对植物生长产生长期的负面影响。
