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@article{1707543,
author = {Liu, Yuankun and Tao, Qi and Li, Jinxing and Guo, Xinyu and Luo, Jipeng and Jupa, Radek and Liang, Yongchao and Li, Tingqiang},
article_location = {Amsterdam},
article_number = {February 2021},
doi = {http://dx.doi.org/10.1016/j.jhazmat.2020.123729},
keywords = {Apoplastic barriers; Cadmium; Casparian strips; Ethylene; Suberin lamellae; Hyperaccumulator.},
language = {eng},
issn = {0304-3894},
journal = {Journal of Hazardous Materials},
title = {Ethylene-mediated apoplastic barriers development involved in cadmium accumulation in root of hyperaccumulator Sedum alfredii},
url = {https://www.sciencedirect.com/science/article/pii/S0304389420317155},
volume = {403},
year = {2021}
}
TY - JOUR
ID - 1707543
AU - Liu, Yuankun - Tao, Qi - Li, Jinxing - Guo, Xinyu - Luo, Jipeng - Jupa, Radek - Liang, Yongchao - Li, Tingqiang
PY - 2021
TI - Ethylene-mediated apoplastic barriers development involved in cadmium accumulation in root of hyperaccumulator Sedum alfredii
JF - Journal of Hazardous Materials
VL - 403
IS - February 2021
SP - 1-10
EP - 1-10
PB - Elsevier Science
SN - 03043894
KW - Apoplastic barriers
KW - Cadmium
KW - Casparian strips
KW - Ethylene
KW - Suberin lamellae
KW - Hyperaccumulator.
UR - https://www.sciencedirect.com/science/article/pii/S0304389420317155
L2 - https://www.sciencedirect.com/science/article/pii/S0304389420317155
N2 - Ethylene is an important phytohormone for plant adaptation to heavy metal stress. However, the effects of ethylene on radial apoplastic transport of Cd remain elusive. This study investigated the role of ethylene on apoplastic barriers development and consequences for Cd uptake in Sedum alfredii. In response to Cd, endogenous ethylene production in hyperaccumulating ecotype (HE) roots was decreased due to the down-regulated ex-pressions of ethylene biosynthesis genes, while the opposite result was observed in non-hyperaccumulating ecotype (NHE). Interestingly, the ethylene emission in HE was always higher than that in NHE, regardless of Cd concentrations. Results of exogenous application of ethylene biosynthesis precursor/inhibitor indicate that ethylene with high level would delay the formation of apoplastic barriers in HE through restraining phenylal-anine ammonia lyase activity and gene expressions related to lignin/suberin biosynthesis. Simultaneously, correlation analyses suggest that Cd-induced apoplastic barriers formation may be also regulated by ethylene signaling. By using an apoplastic bypass tracer and scanning ion-selected electrode, we observed that the delayed deposition of apoplastic barriers significantly promoted Cd influx in roots. Taken together, high endogenous ethylene in HE postponed the formation of apoplastic barriers and thus promoted the Cd accumulation in the apoplast of roots.
ER -
LIU, Yuankun, Qi TAO, Jinxing LI, Xinyu GUO, Jipeng LUO, Radek JUPA, Yongchao LIANG a Tingqiang LI. Ethylene-mediated apoplastic barriers development involved in cadmium accumulation in root of hyperaccumulator Sedum alfredii. \textit{Journal of Hazardous Materials}. Amsterdam: Elsevier Science, 2021, roč.~403, February 2021, s.~1-10. ISSN~0304-3894. Dostupné z: https://dx.doi.org/10.1016/j.jhazmat.2020.123729.
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