A study on photosynthetic characteristics and simulation of the psammophyte Artemisia halodendron

Abstract

Abstract: The diurnal dynamics and light response curve of photosynthetic rate (Pn) were measured in Artemisia halodendron. Under natural conditions the diurnal dynamics of A. halodendron Pn showed double peaks with a significant mid-day depression. The decrease in Pn between 8:00-14:00 was attributed to the stomatal limitation and after 14:00 the decrease was due to non-stomatal limitation. Diurnal dynamics of water use efficiency was similar to that of Pn, showing its strong adaptation to drought. Furthermore, different photosynthetic response models and stomatal models were used to simulate the response and we found that the simulated value of a modified rectangular hyperbola model and modified stomatal model had the best fit with observed values.

CLC Number:

Q945.11

LI Xi-meng, LU Zhi-yao, MA Shuai, FENG Jin-zhao. A study on photosynthetic characteristics and simulation of the psammophyte Artemisia halodendron[J]. Acta Prataculturae Sinica, 2011, 20(6): 293-298.

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