Development of an approach to assess critical doses and dose rates for cultivated plants

Abstract

Abstract. The aim of this work is to develop methods for an assessment of critical doses and dose rates that can result in significant radiation-induced effects in agrocenoses. This is realized on an example of cultivated plants which are one of the main components of agroecosystems. Available information on dose dependences in such umbrella endpoints as reproduction, survival, morbidity, alterations in morphological and biochemical processes, genetic effects in crops, vegetables, fruit trees, etc are gathered from papers issued mainly in Russian scientific press during last 50 years. Data are maintained as database in MS Access that contains about 10000 records at the moment. As critical exposure values, doses are considered producing 50% changes of biological effect at acute impact (ED 50 ), or dose rates resulting in 10% changes at chronic exposure of plants (EDR 10 ). The critical doses and dose rates for agrocenosis estimated from available information on reproduction and survival are presented here. Primary data are assesed for their quality according to several criteria. Three models (linear, logariphmic, logistic) for dose-effect relationship are tested for an applicability to fit a dose-effect dependence taking account of their goodness-of-fit and robustness of ED 50 and EDR 10 estimates.

Economic aspects of food irradiation

“…В работах отечественных и зарубежных ученых детально рассмотрены проблемы радиационной обработки пищевых продуктов, особенностей технологий радиационной обработки [2][3][4], влияния доз облучения и вида ионизирующего излучения на потребительскую ценность сельскохозяйственной продукции [4][5][6][7][8][9]. Особенно следует отметить исследование [8], в котором представлена структура и описано содержание базы данных по воздействию ионизирующих излучений на растения, содержащей более пяти тысяч наборов данных и девятнадцати тысяч пар числовых значений «уровень радиационного воздействия -биологический эффект».…”