Your browser doesn't support javascript.
loading
Important Roles of Thiols in Methylmercury Uptake and Translocation by Rice Plants.
Hao, Yun-Yun; Zhu, Yu-Jie; Yan, Ruo-Qun; Gu, Baohua; Zhou, Xin-Quan; Wei, Ren-Rui; Wang, Chuang; Feng, Jiao; Huang, Qiaoyun; Liu, Yu-Rong.
Afiliación
  • Hao YY; State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
  • Zhu YJ; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
  • Yan RQ; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
  • Gu B; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
  • Zhou XQ; Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
  • Wei RR; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
  • Wang C; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
  • Feng J; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
  • Huang Q; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
  • Liu YR; State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
Environ Sci Technol ; 56(10): 6765-6773, 2022 05 17.
Article en En | MEDLINE | ID: mdl-35483101
The bioaccumulation of the neurotoxin methylmercury (MeHg) in rice is a significant concern due to its potential risk to humans. Thiols have been known to affect MeHg bioavailability in microorganisms, but how thiols influence MeHg accumulation in rice plants remains unknown. Here, we investigated effects of common low-molecular-weight thiols, including cysteine (Cys), glutathione (GSH), and penicillamine (PEN), on MeHg uptake and translocation by rice plants. Results show that rice roots can rapidly take up MeHg, and this process is influenced by the types and concentrations of thiols in the system. The presence of Cys facilitated MeHg uptake by roots and translocation to shoots, while GSH could only promote MeHg uptake, but not translocation, by roots. Conversely, PEN significantly inhibited MeHg uptake and translocation to shoots. Using labeled 13Cys assays, we also found that MeHg uptake was coupled with Cys accumulation in rice roots. Moreover, analyses of comparative transcriptomics revealed that key genes associated with metallothionein and SULTR transporter families may be involved in MeHg uptake. These findings provide new insights into the uptake and translocation of MeHg in rice plants and suggest potential roles of thiol attributes in affecting MeHg bioavailability and bioaccumulation in rice.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oryza / Contaminantes del Suelo / Mercurio / Compuestos de Metilmercurio Límite: Humans Idioma: En Revista: Environ Sci Technol Año: 2022 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oryza / Contaminantes del Suelo / Mercurio / Compuestos de Metilmercurio Límite: Humans Idioma: En Revista: Environ Sci Technol Año: 2022 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos