Abstract
Net photosynthesis was measured from late September to mid-November on leaves of actinorhizal Alnus glutinosa and nonactinorhizal Tilia heterophylla growing in C Illinois. Black alder retained its leaves and continued to photosynthesize for a month longer than white basswood. Maximum photosynthetic rates occurred in September and declined during the autumn for both species, although weekly values fluctuated widely. Mean maximum CO2 fixation rates for black alder and white basswood were 11.88 and 4.62 μmol CO2 . m-2.s-1, respectively, at the initial measurement in late September. On each subsequent weekly measurement date black alder had a significantly higher rate of CO2 fixation than basswood. Night temperatures of 0°C and below caused a sharp decline in photosynthesis for black alder on the following day. Stomatal conductance was highly correlated with photosynthesis, but as these 2 parameters declined over the autumn, intercellular CO2 concentration increased. Thus, nonstomatal limitations are thought to be involved in the temperature-induced reduction in photosynthesis. Prolonged photosynthesis in autumn may give black alder a competitive growth advantage over other deciduous species, compensate for the high energy cost associated with N fixation, or be associated with black alder's inefficient conservation of foliar N via autumnal retranslocation. -Authors
| Original language | English (US) |
|---|---|
| Pages (from-to) | 12-17 |
| Number of pages | 6 |
| Journal | Canadian Journal of Forest Research |
| Volume | 19 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 1989 |
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ASJC Scopus subject areas
- Global and Planetary Change
- Forestry
- Ecology
Cite this
Autumnal photosynthesis is extended in nitrogen-fixing European black alder compared with white basswood : possible adaptive significance. / Neave, I. A.; Dawson, J. O.; Delucia, Evan H.
In: Canadian Journal of Forest Research, Vol. 19, No. 1, 01.01.1989, p. 12-17.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Autumnal photosynthesis is extended in nitrogen-fixing European black alder compared with white basswood
T2 - possible adaptive significance
AU - Neave, I. A.
AU - Dawson, J. O.
AU - Delucia, Evan H
PY - 1989/1/1
Y1 - 1989/1/1
N2 - Net photosynthesis was measured from late September to mid-November on leaves of actinorhizal Alnus glutinosa and nonactinorhizal Tilia heterophylla growing in C Illinois. Black alder retained its leaves and continued to photosynthesize for a month longer than white basswood. Maximum photosynthetic rates occurred in September and declined during the autumn for both species, although weekly values fluctuated widely. Mean maximum CO2 fixation rates for black alder and white basswood were 11.88 and 4.62 μmol CO2 . m-2.s-1, respectively, at the initial measurement in late September. On each subsequent weekly measurement date black alder had a significantly higher rate of CO2 fixation than basswood. Night temperatures of 0°C and below caused a sharp decline in photosynthesis for black alder on the following day. Stomatal conductance was highly correlated with photosynthesis, but as these 2 parameters declined over the autumn, intercellular CO2 concentration increased. Thus, nonstomatal limitations are thought to be involved in the temperature-induced reduction in photosynthesis. Prolonged photosynthesis in autumn may give black alder a competitive growth advantage over other deciduous species, compensate for the high energy cost associated with N fixation, or be associated with black alder's inefficient conservation of foliar N via autumnal retranslocation. -Authors
AB - Net photosynthesis was measured from late September to mid-November on leaves of actinorhizal Alnus glutinosa and nonactinorhizal Tilia heterophylla growing in C Illinois. Black alder retained its leaves and continued to photosynthesize for a month longer than white basswood. Maximum photosynthetic rates occurred in September and declined during the autumn for both species, although weekly values fluctuated widely. Mean maximum CO2 fixation rates for black alder and white basswood were 11.88 and 4.62 μmol CO2 . m-2.s-1, respectively, at the initial measurement in late September. On each subsequent weekly measurement date black alder had a significantly higher rate of CO2 fixation than basswood. Night temperatures of 0°C and below caused a sharp decline in photosynthesis for black alder on the following day. Stomatal conductance was highly correlated with photosynthesis, but as these 2 parameters declined over the autumn, intercellular CO2 concentration increased. Thus, nonstomatal limitations are thought to be involved in the temperature-induced reduction in photosynthesis. Prolonged photosynthesis in autumn may give black alder a competitive growth advantage over other deciduous species, compensate for the high energy cost associated with N fixation, or be associated with black alder's inefficient conservation of foliar N via autumnal retranslocation. -Authors
UR - http://www.scopus.com/inward/record.url?scp=0024484989&partnerID=8YFLogxK
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U2 - 10.1139/x89-002
DO - 10.1139/x89-002
M3 - Article
AN - SCOPUS:0024484989
VL - 19
SP - 12
EP - 17
JO - Canadian Journal of Forest Research
JF - Canadian Journal of Forest Research
SN - 0045-5067
IS - 1
ER -