Absorption of copper by Lemna as influenced by some factors which nullify the copper effect on flowering and growth

absorption acide acide organique acids agentes nocivos ammonia ammoniac biological development chelating agents chemicophysical properties cobre contaminantes contaminantes industriales copper crecimiento croissance cuivre desintoxicantes detoxicants developmental stages drugs elements etapas de desarrollo etapas de desarrollo de la planta facteur nuisible fisiologia floraison flowering fonction physiologique gases gaz growth heavy metals industrial pollutants injurious factors inorganic compounds lemnaceae medicamentos metal metales metales pesados metals monocotyledons organic acids organic compounds physical states physiological functions physiologie physiology plant developmental stages polluant polluant industriel pollutants quelatos spathiflorae transition elements