Photosynthetica 2004, 42(3):387-391 | DOI: 10.1023/B:PHOT.0000046157.50624.61

Photosynthetic Parameters of Mosla hangchowensis and M. dianthera as Affected by Soil Moisture

Y. Ge1, Y. J. Lu1, J. X. Liao1, B. H. Guan1, J. Chang1
1 College of Life Science, The State Key Laboratory of Plant Physiology and Biochemistry, Hangzhou, China

We compared the photosynthetic traits in response to soil water availability in an endangered plant species Mosla hangchowensis Matsuda and in a weed Mosla dianthera (Buch.-Ham.) Maxim. The highest diurnal mean net photosynthetic rate (PNmean), stomatal conductance (gs), and water use efficiency (WUE) of both species occurred at 60 % soil water holding capacity (WHC), while the lowest values occurred at 20 % WHC. The PNmean, gs, and chlorophyll (Chl) a and b contents of M. hangchowensis were lower than those of M. dianthera, while the physiological plasticity indices were higher than those of M. dianthera. M. hangchowensis had strong adaptability to the changing soil water status but weak extending population ability in its habitats because of the low PNmean, which may be one of the causes of its endangerment.

Additional key words: adaptation; chlorophyll content; endangered plant; net photosynthetic rate; stomatal conductance; transpiration rate; water use efficiency

Published: September 1, 2004  Show citation

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Ge, Y., Lu, Y.J., Liao, J.X., Guan, B.H., & Chang, J. (2004). Photosynthetic Parameters of Mosla hangchowensis and M. dianthera as Affected by Soil Moisture. Photosynthetica, 42(3), 387-391. doi: 10.1023/B:PHOT.0000046157.50624.61
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