Study on antimicrobial assay of root extract of allelopathic Helianthus annuus Effects of Photoperiod Under Red LED on Growth and Quality of Sunflower Sprouts The Ultracytochemical Localization of ATPase Activity in the Ovules of Sunflower An Ultrastructural Study on the In Vitro Parthenogenesis in Sunflower Chemical constituents from seeds of Helianthus annuus Effects of Photoperiod Under Red LED on Growth and Quality of Sunflower Sprouts Distribution and Accumulating Regularity of Secondary Metabolites in Helianthus annuus L. Uptake and Distribution of 133Cs and 88Sr in sunflower(Helianthus annuus L.)