J 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

EID Scopus

Klíčová slova anglicky

Apoplastic barriers; Cadmium; Casparian strips; Ethylene; Suberin lamellae; Hyperaccumulator.

Štítky

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.