[Effects of doubled CO2 concentration on Erigeron breviscapus growth and its active constituent accumulation].
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) micromol x mol(-1) and natural (400 +/- 25) micromol x 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.
Li
Xiu-Hua
XH
Institute of Ecology and Geobotany, Yunnan University, Kunming, China. boboan4093_cn@163.com
Su
Wen-Hua
WH
Zhou
Hong
H
Zhang
Guang-Fei
GF
D000393:Air Pollutants / Q000032:analysis*; D047310:Apigenin / Q000378:metabolism*; D018533:Biomass; D002245:Carbon Dioxide / Q000032:analysis* / Q000494:pharmacology; D049919:Erigeron / Q000737:chemistry / Q000254:growth & development* / Q000378:metabolism*; D005965:Glucuronates / Q000378:metabolism*
D000393:Air Pollutants; D005965:Glucuronates; D002245:Carbon Dioxide; C484876:scutellarin; D047310:Apigenin