Abstract
Orychophragmus violaceus, Brassica campestris cv. Chuanyou No.8, and Brassica juncea cv. Luzhousileng diurnal changes of net photosynthetic rate (P N) and activities of carbonic anhydrase (CA) of leaves were studied. One uni-modal curve occurred at the diurnal changes of P N in O. violaceus, but bimodal curves were found in B. campestris and B. juncea. Thus photosynthetic midday depression was not found in O. violaceus but in both Brassica species. Midday depression of P N in O. violaceus was not related to high temperature or low humidity at midday but to the activity of CA.
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Abbreviations
- CA:
-
carbonic anhydrase
- E:
-
transpiration rate
- g s :
-
stomatal conductance
- P N :
-
net photosynthetic rate
- PAR:
-
photosynthetically active radiation
- RH:
-
relative humidity
- RuBPCO:
-
ribulose-1,5-bisphosphate carboxylase/oxygenase
- WUE:
-
water use efficiency
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Wu, Y.Y., Wu, X.M., Li, P.P. et al. Comparison of photosynthetic activity of Orychophragmus violaceus and oil-seed rape. Photosynthetica 43, 299–302 (2005). https://doi.org/10.1007/s11099-005-0049-3
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DOI: https://doi.org/10.1007/s11099-005-0049-3