Geras'kin Stanislav, Churyukin Roman, Volkova Polina
Russian Institute of Radiology and Agroecology, Kievskoe Shosse, 109 Km, 249020, Obninsk, Russia.
Russian Institute of Radiology and Agroecology, Kievskoe Shosse, 109 Km, 249020, Obninsk, Russia.
J Environ Radioact. 2017 Oct;177:71-83. doi: 10.1016/j.jenvrad.2017.06.008. Epub 2017 Jun 15.
The reactions of barley seeds (Nur and Grace varieties) in terms of the root and sprout lengths, germination and root mass were studied after γ-irradiation with doses in the range of 2-50 Gy. The dose range in which plants' growth stimulation occurs (16-20 Gy) was identified. It was shown that increased size of seedlings after irradiation with stimulating doses was due to the enhancing pace of development rather than an earlier germination. The activity of the majority of the enzymes studied increased in the range of doses that cause stimulation of seedlings development. The influences of the dose rate, the quality of seeds, their moisture and time interval between irradiation and initiation of germination on the manifestation of the effects of radiation were investigated. The experimental data on the effect of γ-irradiation on seedlings development were significantly better explained by mathematical models that take into account the hormetic effect.
研究了大麦种子（Nur和Grace品种）在2-50 Gy剂量范围内进行γ辐照后，其根长、芽长、发芽率和根质量的反应。确定了植物生长受到刺激的剂量范围（16-20 Gy）。结果表明，用刺激剂量辐照后幼苗尺寸增加是由于发育速度加快，而非发芽提前。在所研究的大多数酶中，其活性在导致幼苗发育受到刺激的剂量范围内有所增加。研究了剂量率、种子质量、种子水分以及辐照与发芽开始之间的时间间隔对辐射效应表现的影响。考虑到 hormetic效应的数学模型能更好地解释γ辐照对幼苗发育影响的实验数据。
