Cellular organization of the pumpkin stem, and experimental design of nanoparticle application and sample collection. A) Transversal semithin section of pumpkin stem after staining with toluidine blue, showing the main structural elements of the stem: Vascular cores (VC), epidermis (Ep), pith cavity (PC). B) Diagram showing the bioferrofluid application points, the position of the magnet in the plant and the sampling points.
Corredor et al. BMC Plant Biology 2009 9:45 doi:10.1186/1471-2229-9-45