Abstract
In order to identify the relationship between diurnal changes in the net photosynthetic rate (P n) of Pueraria lobata and environmental factors, diurnal changes in the P n of leaves of two P. lobata cultivars were measured using a CIRAS-1 portable photosynthesis measurement system (PP-Systems, UK). The results show that diurnal changes in P n of both cultivars could be interpreted as double-peak curves, indicating the occurrence of an obvious midday depression. Further analyses indicate that the correlation between P n and stomatal conductance was positive and extremely significant (p < 0.01). The correlations of P n with intercellular CO2 concentration and transpiration rate were positive and significant (p < 0.05), while the correlations of P n with air and leaf temperatures were negative and significant (p < 0.05). The results indicate that among the factors affecting photosynthetic properties, some can be grouped as stomatal limitations while others are non-stomatal limitations.
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Ding, Yf., Wang, Cy., Mokgolodi, N.C. et al. Diurnal changes in net photosynthetic rate of Pueraria lobata and its impact factors. For. Stud. China 13, 57–63 (2011). https://doi.org/10.1007/s11632-011-0107-9
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DOI: https://doi.org/10.1007/s11632-011-0107-9