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Light affects salt stress-induced transcriptional memory of P5CS1 in Arabidopsis.
Feng, Xuan Jun; Li, Jing Rui; Qi, Shi Lian; Lin, Qing Fang; Jin, Jing Bo; Hua, Xue Jun.
Afiliación
  • Feng XJ; Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
  • Li JR; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Qi SL; Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
  • Lin QF; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Jin JB; Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
  • Hua XJ; Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
Proc Natl Acad Sci U S A ; 113(51): E8335-E8343, 2016 12 20.
Article en En | MEDLINE | ID: mdl-27930298
To cope with environmental stresses, plants often adopt a memory response upon primary stress exposure to facilitate a quicker and stronger reaction to recurring stresses. However, it remains unknown whether light is involved in the manifestation of stress memory. Proline accumulation is a striking metabolic adaptation of higher plants during various environmental stresses. Here we show that salinity-induced proline accumulation is memorable and HY5-dependent light signaling is required for such a memory response. Primary salt stress induced the expression of Δ1-pyrroline-5-carboxylate synthetase 1 (P5CS1), encoding a proline biosynthetic enzyme and proline accumulation, which were reduced to basal level during the recovery stage. Reoccurring salt stress-induced stronger P5CS1 expression and proline accumulation were dependent upon light exposure during the recovery stage. Further studies demonstrated that salt-induced transcriptional memory of P5CS1 is associated with the retention of increased H3K4me3 level at P5CS1 during the recovery stage. HY5 binds directly to light-responsive element, C/A-box, in the P5CS1 promoter. Deletion of the C/A-box or hy5 hyh mutations caused rapid reduction of H3K4me3 level at P5CS1 during the recovery stage, resulting in impairment of the stress memory response. These results unveil a previously unrecognized mechanism whereby light regulates salt-induced transcriptional memory via the function of HY5 in maintaining H3K4me3 level at the memory gene.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Sales (Química) / Estrés Fisiológico / Proteínas Nucleares / Arabidopsis / Fosfotransferasas (Aceptor de Grupo Alcohol) / Proteínas de Arabidopsis / Glutamato-5-Semialdehído Deshidrogenasa / Factores de Transcripción con Cremalleras de Leucina de Carácter Básico / Luz / Complejos Multienzimáticos Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2016 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Sales (Química) / Estrés Fisiológico / Proteínas Nucleares / Arabidopsis / Fosfotransferasas (Aceptor de Grupo Alcohol) / Proteínas de Arabidopsis / Glutamato-5-Semialdehído Deshidrogenasa / Factores de Transcripción con Cremalleras de Leucina de Carácter Básico / Luz / Complejos Multienzimáticos Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2016 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos