Light response of photosynthesis of different provenance Erythrophleum fordii Oliv
By taking seedlings of Erythrophleum fordii Oliv from six provenances as the studied materials, theirs photosynthetic light response curves were recorded, the photosynthetic indexes such as photosynthetic rate (Pn), intercellular CO2 (Ci), stomatal conductance (Gs) and transpiration rate (Tr), as well as the responses of water use efifciency (RWUE) to radiation gradients were investigated;and the light saturation point (VLSP), light compensation point (VLCP), maximum net photosynthetic rate (Pmax), apparent quantum efifciency (RAQY) and dark respiration rate (Rd) were calculated. The results show that the maximum Pn and Gs were high in seedlings of Pubei and Nanning provenances, and Nanning seedlings had the highest maximum Ci and the Tr remained high state;and Pubei seedlings had the highest RWUE. As for the photosynthetic characteristics, Pubei seedlings had high VLSP, RWUE and Rd and low VLCP, suggesting an adaptation to a wide range of light sources;Nanning and Darongshan seedlings had high VLSP and VLCP, presenting a good acclimatization to bright light;Bobai seedlings had low VLSP and VLCP and high utilization of weak light;Burma seedlings had modest VLSP and VLCP, only adapted to a narrow range of light sources;Vietnam seedlings had low Rd and RWUE, and weak light utilization;Nanning and Pubei seedlings had highest Pmax and photosynthetic potential. The comparison on variations of photosynthesis of E. fordii seedlings of different provenances may inform the species selection for plantation in landscapes of different features.
NETL
NSTL
万方数据
维普
