Micronutrient content does not reflect the status of health in the aquatic carnivorous plant Aldrovanda vesiculosa

Tissue micronutrient content (B, Fe, Mn, Zn, Cu, Mo, Co) was compared in healthy and ill shoots of a rootless aquatic carnivorous plant Aldrovanda vesiculosa growing in an outdoor culture, in plants in the field, in different accessions from around the world, and in shoots and turions. On the basis of microelemental analyses, the observed disorder of shoot apices cannot be explained as deficiency of any of the above micronutrients.