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  • Title: [Relationship between photosynthetic characteristics and environmental factors in leaves of Pueraria lobata].
    Author: Zhou HY, Wang JH, Fang XS, Xue YF, Zhu HF, Dong QT, Cai AM, Fu ZW, Wang L.
    Journal: Zhongguo Zhong Yao Za Zhi; 2008 Nov; 33(22):2595-8. PubMed ID: 19216149.
    Abstract:
    OBJECTIVE: To study the relationship between photosynthetic characteristics and environmental factors in leaves of P. lobata. METHOD: Photosynthetic characteristics and environmental factors were measured by using CIRAS-2 portable photosynthesis system. RESULT: The apparent quantum yield in leaves was 0.0173 micromol CO2 x micromol(-1) photon. The dark respiration rate was 2.9333 micromol x m(-2) x s(-1). The light compensation point of photosynthesis was 180 micromol x m(-2) x s(-1). The light saturation point was 1600 micromol x m(-2) x s(-1). The carboxylation efficiency was 0.0338 micromol x m(-2) x s(-1). The light respiration rate was 2.5 micromol x m(-2) x s(-1). The CO2 compensation point was 100 micromol x mol(-1), The CO2 saturation point was 1 600 micromol x mol(-1). CONCLUSION: Photo flux density and air temperature are major environmental factors influencing diumal changes of net photosynthetic rate.
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