Photosynthetica 2007, 45(4):601-605 | DOI: 10.1007/s11099-007-0103-4

Comparative photosynthesis characteristics of Calycanthus chinensis and Chimonanthus praecox

L. Z. Mao1, H. F. Lu1,*, Q. Wang1, M. M. Cai1
1 College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, Zhejiang, China

Calycanthus chinensis is an endangered plant of the national second-grade protection of China restricted in a small area in Zhejiang Province. We studied parameters of photosynthesis, chlorophyll (Chl) contents, and Chl fluorescence (minimum fluorescence, F0, maximum fluorescence, Fm, variable fluorescence, Fv, and Fv/Fm) of C. chinensis and Chimonanthus praecox. C. chinensis had lower compensation irradiance but higher saturation irradiance than C. praecox. Hence C. chinensis has more advantage in obtaining and utilizing photon energy and higher Chl content, and is more adaptive to higher temperature and propitious to thermal dissipation than C. praecox. In addition, C. chinensis produces abundant, well-preserved seed with a higher germination rate and a wider adaptability to temperature than C. praecox. Thus C. chinensis is prone to survival and viability, and gets rid of the endangered plant species of the national second-grade protection of China.

Additional key words: biodiversity; chlorophyll content and fluorescence; endangered plant; irradiance; net photosynthetic rate; species differences; temperature; transpiration

Received: January 2, 2007; Accepted: April 20, 2007; Published: December 1, 2007  Show citation

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Mao, L.Z., Lu, H.F., Wang, Q., & Cai, M.M. (2007). Comparative photosynthesis characteristics of Calycanthus chinensis and Chimonanthus praecox. Photosynthetica, 45(4), 601-605. doi: 10.1007/s11099-007-0103-4
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