Abstract
We compared light-saturated photosynthetic rates and their stomatal limitations among Cryptomeria japonica trees with a similar height but different current growth rates. Although slow-growing trees had a lower stomatal conductance and a higher carbon isotope ratio in shoots, the stomatal limitations in photosynthesis were not different. Large mesophyll CO2 diffusion resistance contributed to the low photosynthetic rate of the slow-growing trees.
Abbreviations
- P N :
-
net photosynthetic rate
- FG:
-
fast-growing
- SG:
-
slow-growing
- C a :
-
ambient CO2 concentration
- C i :
-
intercellular CO2 concentration
- C c :
-
CO2 concentration in chloroplast stroma
- g s :
-
stomatal conductance
- r m :
-
mesophyll CO2 diffusion resistance
- CE:
-
carboxylation efficiency on a nitrogen content basis
- PPFD:
-
photosynthetic photon flux density
- δ13C:
-
stable carbon isotope ratio
- Ψw :
-
water potential
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Acknowledgements: We are grateful to the staff of the Experimental Station at Tanashi, University of Tokyo, for field assistance. This work was financially supported in part by a Grant-in-Aid for Scientific Research to TT (#21380092) from the Japan Society for the Promotion of Science.
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Tange, T., Someya, M., Norisada, M. et al. Photosynthetic limitation of similar-height Cryptomeria japonica trees growing at different rates. Photosynthetica 51, 158–160 (2013). https://doi.org/10.1007/s11099-013-0006-5
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DOI: https://doi.org/10.1007/s11099-013-0006-5