Record ID No. |
423 |
Author(s) |
Choi D.S., Kayama M., Chung D.J., Jin H.O., Quoreshi A.M., Maruyama Y., Koike T. , 2006 |
Affiliation |
Hokkaido University, Graduate School of Agriculture, Sapporo, Hokkaido 0608589, Japan |
Title |
Mycorrhizal activities in Pinus densiflora, P-koraiensis and Larix kaempferi native to Korea raised under high CO2 concentrations and water use efficiency |
Source. Vol.(no):Page |
Phyton-annals rei botanicae. 45(4):139-144p. |
Categories |
Ectomycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Photosynthesis Soil Moisture |
Host |
Pinus densiflora and Larix kaempferi |
Organism |
Pisolithus tinctorius |
Country |
Japan, Asia |
Abstracts |
The effects of infection by the ectomycorrhiza, Pisolithus tinctorius (Pt), on the growth and photosynthetic characteristics of Pinus densiflora, P. koraiensis and Larix kaempferi were studied. Seedlings of these species were grown at ambient (36 pa) and elevated (72 pa) CO2 concentrations [CO2] with and without Pt infection. After 180 days, Pt inoculation had given rise to significant increases in dry mass and stem diameter of each species at both [CO2], compared with non-inoculated (control) seedlings. Moreover, Pt inoculation at elevated [CO2] (72 Pa) significantly increased ectomycorrhizal development. The phosphorus (P) concentration in needles inoculated with Pt was significantly higher than in non-inoculated seedlings at both [CO2] concentrations. The maximum net photosynthetic rate at saturated CO2 concentration (P-max) and the carboxylation efficiency (CE) of each species inoculated with Pt were higher than for non-inoculated seedlings at both [CO2] concentrations. The difference was significantly greater in P. densiflora. The water use efficiency (WUE) of seedlings inoculated with Pt was significantly raised at both [CO2] concentrations. Moreover, P-max and CE of non-inoculated P. densiflora and P. koraiensis seedlings grown in 72 Pa CO2 for 180 days showed down-regulation compared with those grown in 36 Pa CO2, whereas Pt inoculated seedlings showed no photosynthetic down-regulation at elevated [CO2]. The ectomycorrhizae therefore act to enhance physiological functions related to water, carbon and phosphorus absorption at elevated [CO2]. |