Transcription factor BES1 interacts with HSFA1 to promote heat stress resistance of plants.
Heat stress is a major environmental stress type that can limit plant growth and development. To survive sudden temperature increases, plants utilize the heat shock response, an ancient signaling pathway. Initial results had suggested a role for brassinosteroids (BRs) in this response. Brassinostero...
| Autores: | , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2022 |
| País: | España |
| Recursos: | Universidad de Salamanca (USAL) |
| Repositório: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/168982 |
| Acesso em linha: | http://hdl.handle.net/10366/168982 |
| Access Level: | Acceso aberto |
| Palavra-chave: | BES1 HSFA1 Heat stress plant tolerance abiotic stress Heat-Shock Response Arabidopsis Arabidopsis Proteins DNA-Binding Proteins Gene Expression Regulation Brassinosteroids Transcriptional Activation regulación de la expresión génica proteínas de arabidopsis brasinoesteroides proteínas de unión al ADN respuesta al choque por calor activación transcripcional |
| Resumo: | Heat stress is a major environmental stress type that can limit plant growth and development. To survive sudden temperature increases, plants utilize the heat shock response, an ancient signaling pathway. Initial results had suggested a role for brassinosteroids (BRs) in this response. Brassinosteroids are growth-promoting steroid hormones whose activity is mediated by transcription factors of the BES1/BZR1 subfamily. Here, we provide evidence that BES1 can contribute to heat stress signaling. In response to heat, BES1 is activated even in the absence of BRs and directly binds to heat shock elements (HSEs), known binding sites of heat shock transcription factors (HSFs). HSFs of the HSFA1 type can interact with BES1 and facilitate its activity in HSE binding. These findings lead us to propose an extended model of the heat stress response in plants, in which the recruitment of BES1 is a means of heat stress signaling cross-talk with a central growth regulatory pathway. |
|---|