Mellerowicz, Ewa
- Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
Sammanfattning
Low-methylesterified homogalacturonans have been suggested to play a role in the binding and immobilization of Pb in CW. Using root apices of hybrid aspen, a plant with a high phytoremediation potential, as a model, we demonstrated that the in situ distribution pattern of low-methylesterified homogalacturonan, pectin epitope (JIM5-P), reflects the pattern of Pb occurrence. The region which indicated high JIM5-P level corresponded with "Pb accumulation zone". Moreover, JIM5-P was especially abundant in cell junctions, CWs lining the intercellular spaces and the corners of intercellular spaces indicating the highest accumulation of Pb. Furthermore, JIM5-P and Pb commonly co-localized.The observations indicate that low-methylesterified homogalacturonan is the CW polymer that determines the capacity of ON for Pb sequestration. Our results suggest a promising directions for CW modification for enhancing the efficiency of plant roots in Pb accumulation, an important aspect in the phytoremediation of soils contaminated with trace metals. (C) 2015 Elsevier Ltd. All rights reserved.
Nyckelord
Heavy metal; Cell wall; Populus; Phytoremediation; Tolerance
Publicerad i
Environmental Pollution
2015, volym: 205, sidor: 315-326
Utgivare: ELSEVIER SCI LTD
SLU författare
UKÄ forskningsämne
Miljövetenskap
Ekologi
Publikationens identifierare
- DOI: https://doi.org/10.1016/j.envpol.2015.05.048
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/75377