Temporal Variability of Gallium in Natural Plants

Abstract

The aim of the research was to study the distribution of gallium (Ga) in rhizosphere soil and in plants growing under natural conditions in uncontaminated sites, with an emphasis on temporal fluctuations of Ga concentration in plants. For this purpose, two field experiments were conducted in St. Petersburg, Russia, in 2019 and 2020, at two sites. Three widespread grasses (couch grass, plantain, and dandelion) were chosen for the experiments. ICP–MS analytical technique was applied for the determination of Ga. All plants were capable of accumulating Ga, but the uptake of Ga was different in different plant species, although the plants grew under the same conditions. It can be assumed that one of the main reasons for such differences was the belonging of the plants to different botanical classes, where biochemical processes can proceed differently. The concentration of Ga in plants and rhizosphere soil varied in the daytime. The daily fluctuations of Ga in different plant species were often completely different and did not resemble the temporal fluctuations of Ga in rhizosphere soil. These short-term variations were due to natural reasons and should be considered when collecting plant and soil samples.

Persistent Luminescence Nanoplatform for Autofluorescence-Free Tracking of Submicrometer Plastic Particles in Plant

“…We then studied the feasibility of our PS@PLNP nanoplatform for the quantitation of plastic particles in plants in order to develop a valuable and sensitive method to investigate the biological fate of plastic particles in plants at low concentrations. For this purpose, we also used Ga element as the representative of PS@PLNP for ICP-MS quantitation due to its negligible background in plants . Therefore, it is necessary to establish a quantitative function between the concentration of Ga and PS@PLNP concentration in the plant.…”