| Effects of arbuscular mycorrhizal fungi on photosynthetic efficiency and biomass allocation of Rehmannia glutinosa |
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| DOI：10.7606/j.issn.1000-7601.2026.01.12 |
| Key Words: Rehmannia glutinosa arbuscular mycorrhizal fungi photosynthetic efficiency gas exchange biomass allocation |
| Author Name | Affiliation | | LU Jingjing | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471000, China | | ZHANG Menghan | Henan Zhoukou National Agricultural High Zone Modern Agricultural Industry Research Institute, Zhoukou, Henan 477100, China | | SHI Zhaoyong | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471000, China
Henan Rural Human Settlements Engineering Center, Luoyang, Henan 471000, China
Luoyang Key Laboratory of Symbiosis Microorganism and Green Development, Luoyang, Henan 471000, China | | YUAN Mingli | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471000, China | | LI Yan | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471000, China | | GAO Jiakai | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471000, China
Henan Rural Human Settlements Engineering Center, Luoyang, Henan 471000, China
Luoyang Key Laboratory of Symbiosis Microorganism and Green Development, Luoyang, Henan 471000, China |
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| Abstract: |
| To explore the effects of arbuscular mycorrhizal fungi (AMF) on the photosynthetic efficiency and biomass allocation of Rehmannia glutinosa, a pot experiment was conducted using sterilized soil inoculated with AMF to grow R. glutinosa, and the photosynthetic parameters and fluorescence parameters were measured after 60 days of growth. The results showed that the total biomass of R. glutinosa inoculated with AMF was significantly higher than that of uninoculated R. glutinosa, with Rhizophagus intraradices + Gigaspora ramisporophora (RG) treatment (6.62 g) > G. ramisporophora (G) treatment (4.96 g) > R. intraradices (R) treatment (3.32 g). The proportion of fresh mass and dry mass of underground biomass of R. glutinosa under RG treatment was 69.98% and 66.77%, respectively, which was most conducive to the transportation and accumulation of nutrients to the underground medicinal parts. R. glutinosa inoculated with AMF showed a higher photosynthetic efficiency, and its gas exchange capacity related to CO2 absorption and H2O transpiration during photosynthesis was significantly enhanced. Compared with CK, stomatal conductance (Gs), leaf CO2 conductance (Gc), transpiration rate (Tr), and intercellular CO2 concentration (Ci) increased by 65.0% to 107.0%, 125.86% to 181.03%, 32.0% to 52.0%, and 12.19% to 38.51%, respectively. The internal water vapor concentration (CH2O,i) in the leaves decreased by 6.53% to 10.18 %, but the indicators representing the photochemical performance parameters did not change significantly. In summary, inoculation with AMF can enhance the CO2 and H2O gas exchange capacity in the leaves of R. glutinosa, strengthen the related gas exchange pathways, promote CO2 influx and H2O efflux, increase the net photosynthetic rate, and ultimately boost the biomass of the aboveground and underground biomass and facilitate the transport and accumulation of nutrients to the underground medicinal parts of R. glutinosa. The combined inoculation of two AMF strains showed the greatest effect. |
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