Photosynthetica 2005, 43(2):299-302 | DOI: 10.1007/s11099-005-0049-3

Comparison of photosynthetic activity of Orychophragmus violaceus and oil-seed rape

Y. Y. Wu1,*, X. M. Wu1, P. P. Li1, Y. G. Zhao1, X. T. Li1, X. Z. Zhao1
1 The Institute of the Agricultural Equipment Engineering, Jiangsu University, Jiangsu, China

Orychophragmus violaceus, Brassica campestris cv. Chuanyou No.8, and Brassica juncea cv. Luzhousileng diurnal changes of net photosynthetic rate (PN) and activities of carbonic anhydrase (CA) of leaves were studied. One uni-modal curve occurred at the diurnal changes of PN 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 PN in O. violaceus was not related to high temperature or low humidity at midday but to the activity of CA.

Additional key words: Brassica; carbonic anhydrase; net photosynthetic rate; photosynthetic midday depression

Received: October 1, 2004; Accepted: January 6, 2005; Published: June 1, 2005  Show citation

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Wu, Y.Y., Wu, X.M., Li, P.P., Zhao, Y.G., Li, X.T., & Zhao, X.Z. (2005). Comparison of photosynthetic activity of Orychophragmus violaceus and oil-seed rape. Photosynthetica43(2), 299-302. doi: 10.1007/s11099-005-0049-3
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