Relationship between photosynthetic characteristics and environmental factors in leaves of Pueraria lobata
Zhou, H.-y.; Wang, J.-h.; Fang, X.-s.; Xue, Y.-f.; Zhu, H.-f.; Dong, Q.-t.; Cai, A.-m.; Fu, Z.-w.; Wang, L.
Zhongguo Zhong Yao Za Zhi 33(22): 2595-2598
2008
ISSN/ISBN: 1001-5302 PMID: 19216149 Document Number: 618584
To study the relationship between photosynthetic characteristics and environmental factors in leaves of P. lobata. Photosynthetic characteristics and environmental factors were measured by using CIRAS-2 portable photosynthesis system. 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). Photo flux density and air temperature are major environmental factors influencing diumal changes of net photosynthetic rate.