Short- and long-term effects of elevated CO2 on the growth and nitrogen content of Panax japonicus
Year: 2025
Type: article
Abstract: Panax japonicus (T. Nees) C.A. Mey isarare plant that isused inChinese herbal medicine. Two-year-old Panax japonicus seedlings were grown inopen-top chambers under ambient CO2 (aCO2), moderately (e1CO2:550±15μmol/mol) orsubstantially (e2CO2: 750 ± 15 μmol/mol) elevated CO2 tostudy their effects onplant growth and nitrogen (N) content. After 27 days, the net photosynthetic rate (Pn) ofe2CO2-treated seedlings was significantly higher (20.09%) than that ofseedlings grown under aCO2. However, byday 51, the Pn ofe1CO2- and e2CO2-treated seedlings was 12.87% higher and 9.57% lower, respectively, than that ofseedlings grown under aCO2. Onday 27, chlorophyll a+ b content, Rubisco activity, soluble protein and starch content ofe1CO2- and e2CO2-treated seedlings showed nosignificant change and significant increase compared toaCO2-treated. Bycontrast, at51days, chlorophyll acontent, Rubisco activity, starch and Ncontent ofP. japonicus was significantly increased bymoderately eCO2 condition but was significantly decreased bysubstantially eCO2 condition. The results suggest that exposure tomoderately eCO2 was beneficial for P. japonicus growth, whereas under substantially eCO2, growth were promoted inshort-term but inhibited inlong-term. Owing tothe temporal effect ofeCO2 onP. japonicus growth, there was nosignificant correlation between Ncontent and Pn ofP. japonicus under eCO2.
Source: Horticultural Science
Authors: Xiao Wang, E Liang, Deyan Li, Xiaohui Song
Institution: Anshun University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDGs: Zero hunger, Climate action
Open Access status: gold
Estimated APC paid: $609
OpenAlex ID: W4416632953