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Arabidopsis COP1 guides stomatal response in guard cells through pH regulation.
Cha, Seoyeon; Min, Wang Ki; Seo, Hak Soo.
Afiliación
  • Cha S; Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
  • Min WK; Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
  • Seo HS; Department of Agriculture, Forestry and Bioresources, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea. seohs@snu.ac.kr.
Commun Biol ; 7(1): 150, 2024 Feb 05.
Article en En | MEDLINE | ID: mdl-38316905
ABSTRACT
Plants rely on precise regulation of their stomatal pores to effectively carry out photosynthesis while managing water status. The Arabidopsis CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1), a critical light signaling repressor, is known to repress stomatal opening, but the exact cellular mechanisms remain unknown. Here, we show that COP1 regulates stomatal movement by controlling the pH levels in guard cells. cop1-4 mutants have larger stomatal apertures and disrupted pH dynamics within guard cells, characterized by increased vacuolar and cytosolic pH and reduced apoplastic pH, leading to abnormal stomatal responses. The altered pH profiles are attributed to the increased plasma membrane (PM) H+-ATPase activity of cop1-4 mutants. Moreover, cop1-4 mutants resist to growth defect caused by alkali stress posed on roots. Overall, our study highlights the crucial role of COP1 in maintaining pH homeostasis of guard cells by regulating PM H+-ATPase activity, and demonstrates how proton movement affects stomatal movement and plant growth.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Arabidopsis / Proteínas de Arabidopsis / Ubiquitina-Proteína Ligasas / Estomas de Plantas Idioma: En Revista: Commun Biol Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
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: Arabidopsis / Proteínas de Arabidopsis / Ubiquitina-Proteína Ligasas / Estomas de Plantas Idioma: En Revista: Commun Biol Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido