Relationship between photosynthetic characteristics and environmental factors in leaves of Pueraria lobata.
- Author:
Hong-ying ZHOU
1
;
Jian-hua WANG
;
Xin-sheng FANG
;
Yong-feng XUE
;
Hai-fang ZHU
;
Qi-ting DONG
;
Ai-min CAI
;
Zhi-wen FU
;
Ling WANG
Author Information
- Publication Type:Journal Article
- MeSH: Photosynthesis; physiology; Plant Leaves; metabolism; Pueraria; metabolism
- From: China Journal of Chinese Materia Medica 2008;33(22):2595-2598
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo study the relationship between photosynthetic characteristics and environmental factors in leaves of P. lobata.
METHODPhotosynthetic characteristics and environmental factors were measured by using CIRAS-2 portable photosynthesis system.
RESULTThe 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).
CONCLUSIONPhoto flux density and air temperature are major environmental factors influencing diumal changes of net photosynthetic rate.
