Record ID No. |
2449 |
Author(s) |
Peng Jian.Tao., Yuan Ling., Huang Jian Guo , 2010 |
Affiliation |
College of Natural Resources and Environment, Southwest University, Chongqing 400716, China. jt_peng@126.com; huang99@swu.edu.cn |
Title |
Effects of mercury on growth of ecotrophic mycorrhiza and nitrogen, phosphorus and potassium content in its hyphae |
Source. Vol.(no):Page |
Guizhou Agricultural Sciences.2:106-108p. |
Categories |
Ectomycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Heavy Metals |
Host |
Ectomycorrhiza |
Organism |
Cenococcum geophilum, Lactarius, Pisolithus tinctorius |
Country |
China, Asia |
Abstracts |
4 ecotrophic mycorrhiza strains were treated by different mercury concentrations under liquid solution culture to study the effects on its growth rate and nitrogen, phosphorus and potassium content to select good strains with strong resistance to mercury pollution and high nutrition utilization efficiency. The results showed that the growth of 4 ecotrophic mycorrhiza strains was inhibited by mercury in varying degrees, the growth rate of Cg SIV (Cenococcum geophilum Fr.) under the high mercury stress was 90.3% of CK, the growth rate of Ld-1 (Lactarius sp.) showed no significant difference between 0 and 50 micro mol/L Hg2+ and the growth rate of Pt 715 (Pisolithus tinctorius (Pers.) Coker et Couch) significantly decreased under the mercury stress. The nitrogen content of 3 strains except Cg SIV increased with increase of mercury concentration. The phosphorus absorption of 4 tested strains was not affected by mercury concentration. The potassium content of 4 tested strains increased with increase of mercury concentration, which may indicate that hyphae excrete H+ for exchanging with K+ under mercury stress. Ld-1 and Cg SIV strains with high tolerance to mercury can be inoculated on trees planted in the soils with mercury pollution for raising the mercury resistance of the inoculated trees. |