Mycorrhizal Networks Interacting with Litter Improves Nutrients and Growth for One Plant through the Vary of N/P Ratio under Karst Soil |
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Authors: | Liling Kang Yuejun He Lipeng Zang Jianpeng Si Ying Yang Kaiping Shen Tingting Xia Qiyu Tan Bangli Wu Yun Guo Wei Wang Qin Liang |
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Institution: | 1 Forestry College, Forest Ecology Research Center, Guizhou University, Guiyang, 550025, China2 College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing, 402160, China3 School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China |
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Abstract: | Arbuscular mycorrhizae (AM) fungi affect nutrient uptake for host plants, while it is unclear how AM fungi interacting with soil litter affect plant growth and nutrient utilization through mycorrhizal networks in karst soil of
deficient nutrients beyond the rhizosphere. An experiment was conducted in a microcosm composed of a planting
compartment for Cinnamomum camphora seedlings with or without Glomus mosseae fungus (M+ vs. M?
) and an
adjacent litter compartment containing or not containing additional litter material of Arthraxon hispidus (L+ vs.
L?
), where the compartments are connected either by nylon mesh of 20 μm or 0.45 μm which either allow available mycorrhizal networks within the litter compartment or prevent mycelium entering into the litter compartment (N+ vs. N?
). Plant biomass and nutrients were measured. The results showed that the addition of litter
changed the symbiotic process in mycorrhizal colonization, spore, and hyphal density, which when in association
with the host plant then affected the biomass, and accumulations of N (nitrogen) and P (phosphorus) in the individual plant as well as root, stem, and leaf respectively. AM fungi increased N and P accumulations and N/P ratio
in individual plants and plant tissues. A decrease of the N/P ratio of the individual plant was observed when AM
fungus interacted significantly with litter through mycorrhizal networks in the litter compartment. The results
indicate that the C. camphora seedlings benefited from litter in nutrient utilization of N and P through the vary
of N/P ratio when accessing mycorrhizal networks. These findings suggest that mycorrhizal networks interacting
with litter improve growth and nutrients of N and P for plants through the vary of N/P ratio in order to alleviate
nutrient limitation under karst soil. |
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Keywords: | Arbuscular mycorrhizae Cinnamomum camphora" target="_blank">Cinnamomum camphora" target="_blank">Cinnamomum camphora litter mycelium nutrient utilization |
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