Effects of smoke-water on photosynthetic characteristics of Isatis indigotica seedlings
Although it is well documented that smoke water promotes medicinal plants growth,there are few published studies on the mechanism of smoke water improving the plants growth.This study highlights the effects of smoke wateron photosynthetic gas-exchange characteristics and chlorophyll fluorescence on Isatis indigotica,a Chinese medicinal plant.Results showed that net photosynthetic rate (Pn) in leaves was increased by smoke water,which reached a maximum on days 15,5 and 15 after the treatment with smoke water at dilutions of 1∶500,1 ∶ 1000 and 1∶2000 respectively.Transpiration rate (Tr) and stomatal conductance (Gs) both showed similar trends to Pn.However intercellular CO2 concentration (Ci) showed a decreasing trend after the treatment of smoke water.The Fv/Fm ranged from 0.78 to 0.86 and did not show any significant differences with the treatment of smoke water.The ΦPSⅡ was markedly promoted with the application of smoke water (1∶1000) compared with control and smoke water at dilutions of 1∶500 and 1∶2000.The coefficient of photochemical quenching (qP) showed a similar trend to that observed with the ΦPSⅡ.The coefficient of non-photochemical quenching of chlorophyll (NPQ) was decreased with treatment of smoke water.These findings suggest the increase in photosynthesis induced by smoke water may be attributed to the enhanced stomatal conductance of the leaves and the increased level of the photochemical efficiency of PSⅡ.
Isatis indigotica Smoke-water Gas-exchange Chlorophyll fluorescence
周洁 刘建华 王晓 刘伟 郭兰萍 黄璐琦
山东省科学院
国内会议
中国生态学学会中药资源生态专业委员会第4次全国学术研讨会暨中华中医药学会中药鉴定分会第11次全国学术研讨会
昆明
英文
305-309
2012-07-20（万方平台首次上网日期，不代表论文的发表时间）