Leaf photosynthetic characteristics of seedlings of actinorhizal Alnus spp. and Elaeagnus spp.
Photosynth Res
; 16(3): 211-8, 1988 Jun.
Article
en En
| MEDLINE
| ID: mdl-24429528
Single leaf photosynthetic characteristics of Alnus glutinosa, A. incana, A. rubra, Elaeagnus angustifolia, and E. umbellata seedlings conditioned to ambient sunlight in a glasshouse were assessed. Light saturation occurred between 930 and 1400 µmol m(-2)s(-1) PAR for all species. Maximum rates of net photosynthesis (Pn) measured at 25°C ranged from 12.8 to 17.3 µmol CO2m(-2)s(-1) and rates of dark respiration ranged from 0.74 to 0.95 µmol CO2m(-2)s(-1). These values of leaf photosynthetic variables are typical of early to midsuccessional species. The rate of Pn measured at optimal temperature (20°C) and 530µmol m(-2)s(-1) PAR was significantly (p<0.01) correlated with leaf nitrogen concentration (r=0.69) and negatively correlated with the mean area of a leaf (r=-0.64). We suggest that the high leaf nitrogen concentration and rate of Pn observed for Elaeagnus umbellata and to a lesser degree for E. angustifolia are genetic adaptations related to their crown architecture.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Photosynth Res
Asunto de la revista:
METABOLISMO
Año:
1988
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Países Bajos