2021
Ethylene-mediated apoplastic barriers development involved in cadmium accumulation in root of hyperaccumulator Sedum alfredii
LIU, Yuankun; Qi TAO; Jinxing LI; Xinyu GUO; Jipeng LUO et al.Základní údaje
Originální název
Ethylene-mediated apoplastic barriers development involved in cadmium accumulation in root of hyperaccumulator Sedum alfredii
Autoři
LIU, Yuankun; Qi TAO; Jinxing LI; Xinyu GUO; Jipeng LUO; Radek JUPA; Yongchao LIANG a Tingqiang LI
Vydání
Journal of Hazardous Materials, Amsterdam, Elsevier Science, 2021, 0304-3894
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10611 Plant sciences, botany
Stát vydavatele
Nizozemské království
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 14.224
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14310/21:00120861
Organizační jednotka
Přírodovědecká fakulta
UT WoS
EID Scopus
Klíčová slova anglicky
Apoplastic barriers; Cadmium; Casparian strips; Ethylene; Suberin lamellae; Hyperaccumulator.
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 14. 1. 2021 11:09, Mgr. Marie Novosadová Šípková, DiS.
Anotace
V originále
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.