Влияние низкоинтенсивного электромагнитного поля на чувствительность рачков Daphnia magna Straus (Daphniidae, Crustacea) к солям тяжелых металлов на примере бихромата калия и сульфата кадмия

Исследовали влияние низкоинтенсивного электромагнитного поля (ЭМП) на чувствительность Daphnia magna Straus, 1820 к двум модельным токсикантам – бихромату калия К₂Сr₂O₇ и сульфату кадмия 3CdSO₄ꞏ8H₂O. Использовали два режима воздействия ЭМП с частотой 30 МГц: с постоянной амплитудой и в режиме амплитудной манипуляции (АМ) меандром с частотой 50 Гц. О влиянии ЭМП на чувствительность дафний судили по изменению выживаемости рачков, помещенных в растворы токсикантов после воздействия ЭМП. Различия в чувствительности дафний, облученных ЭМП, к исследуемым токсикантам проявлялись в динамике снижения выживаемости в растворах солей в течение 96 ч экспозиции. Наиболее заметными были различия между эффектами воздействия кадмия и бихромата на рачков, облученных в режиме АМ. С целью анализа наследования признаков проведено сравнение эффектов тяжелых металлов на выживаемость потомства у непосредственно облученных самок (серия I) и необлученного ЭМП потомства облученных самок (серия II). Потомство дафний от облучённых самок (серия II) характеризовалось более высокой устойчивостью к токсикантам по сравнению с серией I. Для объяснения повышенной устойчивости потомства облученных рачков обсуждается возможность запуска адаптивных механизмов к повреждающему информационному воздействию ЭМП на генетический материал самок. 

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