Photosynthetica 2005, 43(1):111-115 | DOI: 10.1007/s11099-005-1115-6

Effects of irradiance on photosynthetic characteristics and growth of Mosla chinensis and M. scabra

J. X. Liao1, Y. Ge1, C. C. Huang1, J. Zhang1, Q. X. Liu1, J. Chang1,*
1 College of Life Science, State Key Laboratory of Plant Physiology and Biochemistry, Zhejiang University, Hangzhou, P.R. China

Photosynthetic and growth characteristics of Mosla chinensis and M. scabra were compared at three irradiances similar to shaded forest understory, forest edge, and open land. At 25 % full ambient irradiance, M. chinensis and M. scabra had similar photosynthetic characteristics, but saturation irradiance, compensation irradiance, and apparent quantum yield of M. chinensis were higher than those of M. scabra at full ambient irradiance and 70 % full ambient irradiance. At the same irradiance treatment, specific leaf area and leaf area ratio of M. chinensis were lower than those of M. scabra. Photon-saturated photosynthetic rate and water use efficiency of M. chinensis, however, were not significantly higher than those of M. scabra, and the leaf area and total biomass were lower than those of M. scabra. As a sun-acclimated plant, the not enough high photosynthetic capacity and lower biomass accumulation may cause that M. chinensis has weak capability to extend its population and hence be concomitant in the community.

Additional key words: biomass accumulation; compensation and saturation irradiance; concomitant species; leaf area ratio; net photosynthetic rate; plasticity; specific leaf area; water use efficiency

Received: July 1, 2004; Accepted: October 11, 2004; Published: March 1, 2005  Show citation

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Liao, J.X., Ge, Y., Huang, C.C., Zhang, J., Liu, Q.X., & Chang, J. (2005). Effects of irradiance on photosynthetic characteristics and growth of Mosla chinensis and M. scabra. Photosynthetica, 43(1), 111-115. doi: 10.1007/s11099-005-1115-6
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