大气二氧化碳倍增对短葶飞蓬生长和有效成分积累的影响  

Effects of doubled CO_2 concentration on Erigeron breviscapus growth and its active constituent accumulation

作　　者：李秀华[1] 苏文华[1] 周鸿[1] 张光飞[1] 

机构地区：[1]云南大学生态学与地植物学研究所,昆明650091

出　　处：《应用生态学报》2009年第8期1852-1856,共5页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30360009)资助

摘　　要：通过对人工倍增CO2浓度(800±100)μmol·mol-1与正常CO2浓度(400±25)μmol·mol-1条件下短葶飞蓬植株生物量、体内灯盏乙素和总咖啡酸酯含量及产量的比较,探讨了CO2浓度升高对药用植物短葶飞蓬生物量、有效成分含量及产量的影响.结果表明:CO2浓度倍增条件下,短葶飞蓬植株生物量增加了22%;总咖啡酸酯及灯盏乙素含量分别增加23%和26%,产量分别增加37.6%和45.3%.不同器官的生物量及有效成分含量对CO2浓度升高的响应不同.在CO2浓度倍增条件下,短葶飞蓬植株含氮量减少47.2%,与次生代谢有效成分含量的变化呈反比,符合"碳素/营养平衡假说";植株生物量与次生代谢产物含量的变化呈正相关,植株生长与次生代谢产物积累之间没有表现出权衡关系.说明合理施用CO2是可实现短葶飞蓬的优质高产.With medicinal plant Erigeron breviscapus as test material, its biomass and the contents and yields of scutellarin and caffeate were monitored under doubled （800 ± 100） μmol ·mol^-1 and natural （400 ±25） μmol· mol^ -1 CO2 concentration. Comparing with those under natural CO2 concentration, the biomass of E. breviscapus under doubled CO2 concentration increased by 22%, the contents of scutellarin and caffeate increased by 23% and 26%, and the yields of these two constituents increased by 37.6% and 45.3% , respectively. Different organs had different responses in their biomass and active constituent contents to the elevated CO2 concentration. Under doubled CO2 concentration, the plant N content decreased by 47.2% and was negatively correlated with active constituent contents, being accorded well to the C/N balance hypothesis, and the biomass was positively correlated with the active constituent contents while no trade-off was observed between plant growth and secondary metabolism, suggesting that rational application of CO2 could improve the yield and quality of E. breviscapus.

关 键 词：CO2升高 灯盏花 生物量 黄酮 咖啡酸酯 

分 类 号：S567.239[农业科学—中草药栽培]