Water-use efficiency declines during autumn leaf senescence in three deciduous tree species

Adriana Sanchez, Nicole M. Hughes, William K. Smith

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

1 Cita (Scopus)


During fall leaf senescence in deciduous species, photosynthesis nears completion due to chlorophyll breakdown and re-assimilation. However, several other processes such as leaf nutrient uptake, re-translocation, and storage, or tissue dehydration to avoid frost damage, may be important and dependent upon stom-atal opening. We report here on measured changes in photosynthesis (A), leaf conductance to water vapor (g), and WUE (estimated by A/g) in three deciduous tree species (Acer saccharum, Cornus florida, and Ginkgo biloba) during the weeks of leaf senescence preceding abscission. Substantial decreases in A of 60 up to 80% were not matched quantitatively by similar declines in g (40 to 70%), resulting in corresponding decreases in WUE (estimated by A/g) from near 50% to over 300% among the three species. This shift to a lower WUE may reflect adaptive value in maintaining a higher g relative to A during the fall leaf senescence period.

Idioma originalInglés estadounidense
Páginas (desde-hasta)26-28
Número de páginas3
PublicaciónInternational Journal of Plant Biology
EstadoPublicada - 2013
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Botánica


Profundice en los temas de investigación de 'Water-use efficiency declines during autumn leaf senescence in three deciduous tree species'. En conjunto forman una huella única.

Citar esto