Publicação
ZIFL1.1 transporter modulates polar auxin transport by stabilizing membrane abundance of multiple PINs inArabidopsisroot tip
| Resumo: | Cell-to-cell directional flow of the phytohormone auxin is primarily established by polar localization of the PIN auxin transporters, a process tightly regulated at multiple levels by auxin itself. We recently reported that, in the context of strong auxin flows, activity of the vacuolar ZIFL1.1 transporter is required for fine-tuning of polar auxin transport rates in the Arabidopsis root. In particular, ZIFL1.1 function protects plasma-membrane stability of the PIN 2 carrier in epidermal root tip cells under conditions normally triggering PIN 2 degradation. Here, we show that ZIFL1.1 activity at the root tip also promotes PIN 1 plasma-membrane abundance in central cylinder cells, thus supporting the notion that ZIFL1.1 acts as a general positive modulator of polar auxin transport in roots. |
|---|---|
| Autores principais: | Remy, Estelle |
| Outros Autores: | Baster, Pawel; Friml, Jiří; Duque, Paula |
| Assunto: | Arabidopsis thaliana Major Facilitator Superfamily PIN transporters polar auxin transport root development |
| Ano: | 2013 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Repositório do GIMM – Gulbenkian Institute for Molecular Medicine |
| Idioma: | inglês |
| Origem: | ARCA |
| Resumo: | Cell-to-cell directional flow of the phytohormone auxin is primarily established by polar localization of the PIN auxin transporters, a process tightly regulated at multiple levels by auxin itself. We recently reported that, in the context of strong auxin flows, activity of the vacuolar ZIFL1.1 transporter is required for fine-tuning of polar auxin transport rates in the Arabidopsis root. In particular, ZIFL1.1 function protects plasma-membrane stability of the PIN 2 carrier in epidermal root tip cells under conditions normally triggering PIN 2 degradation. Here, we show that ZIFL1.1 activity at the root tip also promotes PIN 1 plasma-membrane abundance in central cylinder cells, thus supporting the notion that ZIFL1.1 acts as a general positive modulator of polar auxin transport in roots. |
|---|
Atividades financiadas
Carregando projetos financiados...