В статье приведены результаты анализа проростков сахарной свеклы, семена которых перед посевом были инкрустированы защитно-стимулирующими составами (ЗСС) на основе поливинилацетатной дисперсии (ПВА), содержащими брассинолид (БЛ, ЗСС-БЛ) или эпибрассинолид (ЭБЛ, ЗСС-ЭБЛ) в концентрации 10–8 М. Изучены ростовые параметры, содержание фотосинтетических пигментов и фотосинтетическая активность растений. Установлено, что обработка семян ЗСС-ЭБЛ обеспечила увеличение массы корня проростков на 56 % относительно контроля. Методом PAM-флуориметрии выявлено, что ЗСС-БЛ снижает нерегулируемые потери энергии фотосистемы (ФС) II (Y(NO)) на 24 % и повышает эффективность работы ФС II (Y(II)) на 62 %.

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