![]() ![]() Moreover, there was a minor freezing–thawing effect with respect to nanoparticle amount and size. ![]() We found that the concentration of nanoparticles and polar lipids was (i) diluted when an increasing amount of sap was extracted, (ii) significantly correlated to each other for three species, (iii) affected by vessel anatomy, (iv) very low and largely different in chemical composition from contamination controls and (v) hardly variable among seasons. Concentrations of nanoparticles and lipids in xylem sap and contamination control samples were measured with a NanoSight device and mass spectrometry. We collected xylem sap of six temperate angiosperm species over the whole year to consider seasonal variation. These predictions included that polar lipid and nanoparticle concentrations would be correlated, that they both do not pass through pit membranes and that they do not vary seasonally because they originate from living vessel element cells. A major goal of this study was to test predictions arising from the hypothesis that the nanoparticles consist largely of polar lipids from the original cell content of vessel elements. In previous research, xylem sap of angiosperms has been found to include low concentrations of nanoparticles and polar lipids.
0 Comments
Leave a Reply. |