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- Title
外生菌根真菌菌丝对马尾松苗氮素传递的影响.
- Authors
涂桂英; 王艺; 田磊; 江泽汀; 覃云展; 刘山玉
- Abstract
To investigate the effect of ectomycorrhizal fungal hyphae on nitrogen absorption, transmission and distribution among masson pine seedlings, a pot experiment was carried out by using 15N tracer technique and four-compartment mesh system. The results showed that the mycelia in the donor plants inoculated with ectomycorrhizal fungi could pass through the clay layer and isolation layer and reach the recipient chamber, forming a mycelial bridge between the donor and receiver plants. The seedling height, ground diameter and biomass of donor plants were significantly increased after inoculation (P<0.05), but the effects on receiver plants varied with fungal species. Inoculation of Scleroderma citrinum (Sc) had a significant promoting effect on the seedling height, ground diameter and biomass of receiver plants (P<0.05). There was no significant difference in the total nitrogen content of donor and receiver plants after inoculation with different fungal species (P>0.05), except that the total nitrogen content of the plants inoculated with Pisolithus orientalis (Po) was significantly higher than that inoculated with other fungi. The nitrogen uptake of root, stem and leaf of donor plants was significantly increased after inoculation (P<0.05), and the level of increase was graded as root>stem>leaf. Total nitrogen uptake of the receiver plants inoculated with Po, Sc and Suillus luteus (Sl) increased significantly (P<0.05), while there was no significant difference in total nitrogen uptake between plants inoculated with the mixed ectomycorrhizal fungi (Sm) and plants uninoculated (NE) (P>0.05). The receiver plants inoculated with Sl had the highest uptake (91.68 µg/pot) and transmissivity (75.89%) of 15N, followed by those inoculated with Po. Among the donor plants, except that 15N was mainly distributed in the leaves of the plants inoculated with Sl, 15N was all distributed in roots of plants inoculated. Among the receiver plants inoculated with Po, Sl and Sm, 15N was the mainly stored in roots, while those treated with NE and Sc 15N was mainly distributed in stems. In conclusion, mycelium bridge can be formed between the donor and receiver masson pine seedlings, and inoculation of ectomycorrhizal fungi can promote the height, ground diameter, biomass accumulation and improve nitrogen absorption of donor plants, but the effects of different fungal species on receiver plants were different, and Sc was the best inoculum. In addition, different fungal species have different effects on the total nitrogen content, 15N uptake, transfer and allocation rate of the seedlings, and Po and Sl behaved better.
- Subjects
NITROGEN content of plants; ECTOMYCORRHIZAL fungi; PLANT inoculation; PLANT biomass; FOLIAGE plants; NITROGEN
- Publication
Mycosystema, 2022, Vol 41, Issue 12, p2004
- ISSN
1672-6472
- Publication type
Article
- DOI
10.13346/j.mycosystema.220075