Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Phytochrome B enhances photosynthesis at the expense of water-use efficiency in Arabidopsis

Boccalandro, Hernan EstebanIcon ; Rugnone, Matias LeandroIcon ; Moreno, Javier EdgardoIcon ; Ploschuk, Edmundo Leonardo; Serna, Laura; Yanovsky, Marcelo JavierIcon ; Casal, Jorge JoséIcon
Fecha de publicación: 04/2009
Editorial: American Society of Plant Biologist
Revista: Plant Physiology
ISSN: 0032-0889
e-ISSN: 1532-2548
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ética relacionada con Biotecnología Agrícola

Resumen

In open places, plants are exposed to higher fluence rates of photosynthetically active radiation and to higher red to far-red ratios than under the shade of neighbor plants. High fluence rates are known to increase stomata density. Here we show that high, compared to low, red to far-red ratios also increase stomata density in Arabidopsis (Arabidopsis thaliana). High red to far-red ratios increase the proportion of phytochrome B (phyB) in its active form and the phyB mutant exhibited a constitutively low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves. Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term water-use efficiency estimated by the analysis of isotopic discrimination against (13)CO(2). We propose a model where active phyB promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a reduction of water-use efficiency, which is compensated by a reduced leaf area.
Palabras clave: Phytochrome B , Photosynthesis
Ver el registro completo
 
Archivos asociados
Thumbnail
 
Tamaño: 321.5Kb
Formato: PDF
.
Descargar
Licencia
info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/25934
URL: http://www.plantphysiol.org/content/150/2/1083
DOI: https://doi.org/10.1104/pp.109.135509
Colecciones
Articulos(IBAM)
Articulos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Articulos(IIBBA)
Articulos de INST.DE INVEST.BIOQUIMICAS DE BS.AS(I)
Citación
Boccalandro, Hernan Esteban; Rugnone, Matias Leandro; Moreno, Javier Edgardo; Ploschuk, Edmundo Leonardo; Serna, Laura; et al.; Phytochrome B enhances photosynthesis at the expense of water-use efficiency in Arabidopsis; American Society of Plant Biologist; Plant Physiology; 150; 2; 4-2009; 1083-1092
Compartir
Altmétricas
 

Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • X Conicet Digital
  • Instagram
  • YouTube
  • Sound Cloud
  • LinkedIn

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES