Multiscale imaging on Saxifraga paniculata provides new insights into yttrium uptake by plants

Abstract

Yttrium (Y) has gained importance in high tech applications and, together with the other rare earth elements (REEs), is also considered to be an emerging environmental pollutant. The alpine plant Saxifraga paniculata was previously shown to display high metal tolerance and an intriguing REE accumulation potential. In this study, we analysed soil grown commercial and wild specimens of Saxifraga paniculata to assess Y accumulation and shed light on the uptake pathway. Laser ablation inductively coupled plasma mass spectrometry and synchrotron-based micro X-ray fluorescence spectroscopy was used to localise Y within the plant tissues and identify colocalized elements. Y was distributed similarly in commercial and wild specimens. Within the roots, Y was mostly located in the epidermis region. Translocation was low, but wild individuals accumulated significantly more Y than commercial ones. In plants of both origins, we observed consistent colocalization of Al, Fe, Y and Ce in all plant parts except for the hydathodes. This indicates a shared pathway during translocation and could explained by the formation of a stable organic complex with citrate, for example. Our study provides important insights into the uptake pathway of Y in S. paniculata, which can be generalised to other plants.

Production of, Factors Affecting, Gene Regulations, and Challenges in Tissue Cultured Plant through Soilless Culture

“…The hardening process consumes more time and counters regenerated plant loss . In the soilless culture, the tissue cultured plants are directly transferred in the water based culture and substrate based culture in the closed and controlled environmental system . The water based culture and substrate based culture continuously enhance the cellular, biochemical, and molecular processes in tissue cultured plant under the closed system, and they also eliminate the hardening process and save growing time …”

Relationships between carboxylate-based nutrient-acquisition strategies, phosphorus-nutritional status and rare earth element accumulation in plants

“…A split-root approach was used to exclude the direct effects of P-addition on REE availability, i.e. by precipitation as REE-phosphates (Fehlauer et al 2022;Liu et al 2022). Thus, one root half received all essential plant nutrients except phosphate, which was supplied to one root half only.…”

“…Liu et al 2021;Fehlauer et al 2022). In B. napus, high shoot and low root [Cd] can be primarily explained by the e cient in ux and transport of Cd from roots to shoots(Selvam and Wong 2009).…”