Detailed Information on Publication Record
2017
The apoplasmic pathway via the root apex and lateral roots contributes to Cd hyperaccumulation in the hyperaccumulator Sedum alfredii
TAO, Qi, Radek JUPA, Jipeng LUO, Alexander LUX, Ján KOVÁČ et. al.Basic information
Original name
The apoplasmic pathway via the root apex and lateral roots contributes to Cd hyperaccumulation in the hyperaccumulator Sedum alfredii
Authors
TAO, Qi (156 China), Radek JUPA (203 Czech Republic, belonging to the institution), Jipeng LUO (156 China), Alexander LUX (703 Slovakia), Ján KOVÁČ (703 Slovakia), Yue WEN (156 China), Yimei ZHOU (156 China), Japenga JAN (156 China), Yongchao LIANG (156 China) and Tingqiang LI (156 China, guarantor)
Edition
Journal of Experimental Botany, Oxford, OXFORD UNIV PRESS, 2017, 0022-0957
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10600 1.6 Biological sciences
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 5.354
RIV identification code
RIV/00216224:14310/17:00096208
Organization unit
Faculty of Science
UT WoS
000397158100032
Keywords in English
Apoplasmic bypass; cadmium; hydraulic conductance; lateral roots; root apex; Sedum alfredii; suberin lamellae; trisodium-8-hydroxy-1-3-6-pyrenetrisulphonic acid (PTS)
Tags
International impact, Reviewed
Změněno: 12/4/2018 12:18, Ing. Nicole Zrilić
Abstract
V originále
Although the significance of apoplasmic barriers in roots with regards to the uptake of toxic elements is generally known, the contribution of apoplasmic bypasses (ABs) to cadmium (Cd) hyperaccumulation is little understood. Here, we employed a combination of stable isotopic tracer techniques, an ABs tracer, hydraulic measurements, suberin lamellae staining, metabolic inhibitors, and antitranspirants to investigate and quantify the impact of the ABs on translocation of Cd to the xylem in roots of a hyperaccumulating (H) ecotype and a non-hyperaccumulating (NH) ecotype of Sedum alfredii. In the H ecotype, the Cd content in the xylem sap was proportional to hydrostatic pressure, which was attributed to pressure-driven flow via the ABs. The contribution of the ABs to Cd transportation to the xylem was dependent on the Cd concentration applied to the H ecotype (up to 37% at the highest concentration used). Cd-treated H ecotype roots showed significantly higher hydraulic conductance compared with the NH ecotype (76 vs 52 × 10–8 m s–1MPa–1), which is in accordance with less extensive suberization due to reduced expression of suberin-related genes. The main entry sites of apoplasmically transported Cd were localized in the root apexes and lateral roots of the H ecotype, where suberin lamellae were not well developed. These findings highlight the significance of the apoplasmic bypass in Cd hyperaccumulation in hyperaccumulating ecotypes of S. alfredii.