Effect of Soil Moisture on the Gas Exchange of Changium smyrnioides and Anthriscus sylvestris |
| |
| Authors: | Y Ge J Chang W-C Li H-Y Sheng C-L Yue GYS Chan |
| |
| Institution: | (1) College of Life Science, Zhejiang University, 232 Wensan Road, Hangzhou, 310012 P.R, China;(2) Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P.R, China |
| |
| Abstract: | The effect of soil moisture on gas exchange and growth of an endangered species, Changium smyrnioides, was compared with a non-endangered species, Anthriscus sylvestris. The two species belong to the same family Umbellaceae. With the decrease of soil moisture, the net photosynthetic rate (PN) and transpiration rate (E) decreased, while water use efficiency (WUE) increased, PN and WUE of C. smyrnioides were lower than those of A. sylvestris, whereas E was higher than that of A. sylvestris. The biomass, leaf mass ratio (LMR) and leaf area ratio (LAR) of C. smyrnioides were lower than those of A. sylvestris. Under drought, biomass. LMR and LAR of C. smyrnioides decreased more steeply than those of A. sylvestris, whereas specific root length (SRL) of C. smyrnioides was higher, compared to that of A. sylvestris. The present study indicated that C. smyrnioides accumulated less biomass, and directed more biomass to roots than A. sylvestris. |
| |
| Keywords: | growth analysis photosynthesis physiological traits structural traits transpiration water use of efficiency |
| 本文献已被 SpringerLink 等数据库收录！ |
|
