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INFLUENCE OF DIFFERENT N FORMS ON SPORE GERMINATION AND HYPHAL GROWTH OF AM FUNGUS

Zhu Hong

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Abstract

Influence of different N forms on spore germination and hyphal growth of AM fungus, Gigaspora margarita, were investigated on Long-Ashton medium. Results indicated that spore germination was fast at early stage and slow at late stage on NO3--N and NH4+-NO3--N mediums, but just the reverse on NH4+-N medium. No difference was detected among spore germination rates on three mediums at finial stage, all reaching about 50%. Significant difference was observed among the hyphal growths on three mediums. Extending rate and length of germ hyphae were higher on NO3--N and NH4+-NO3--N mediums than on NH4+-N medium. This experiment demonstrated that NH4+-N didnt reduce AM fungal spore germination, but inhibited the hyphal growth, as compared with NO3--N and NH4+-NO3--N.

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What this paper is about

Influence of different N forms on spore germination and hyphal growth of AM fungus, Gigaspora margarita, were investigated on Long-Ashton medium. Results indicated that spore germination was fast at early stage and slow at late stage on NO3--N and NH4+-NO3--N mediums, but just the reverse on NH4+-N medium. No difference was detected among spore germination rates on three mediums at finial stage, all reaching about 50%. Significant difference was observed among the hyphal growths on three mediums. Extending rate and length of germ hyphae were higher on NO3--N and NH4+-NO3--N mediums than on NH4+-N medium. This experiment demonstrated that NH4+-N didnt reduce AM fungal spore germination, but inhibited the hyphal growth, as compared with NO3--N and NH4+-NO3--N.

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Available abstract

Influence of different N forms on spore germination and hyphal growth of AM fungus, Gigaspora margarita, were investigated on Long-Ashton medium. Results indicated that spore germination was fast at early stage and slow at late stage on NO3--N and NH4+-NO3--N mediums, but just the reverse on NH4+-N medium. No difference was detected among spore germination rates on three mediums at finial stage, all reaching about 50%. Significant difference was observed among the hyphal growths on three mediums. Extending rate and length of germ hyphae were higher on NO3--N and NH4+-NO3--N mediums than on NH4+-N medium. This experiment demonstrated that NH4+-N didnt reduce AM fungal spore germination, but inhibited the hyphal growth, as compared with NO3--N and NH4+-NO3--N.

Key concepts: Germination, Spore, Spore germination, Hypha, Fungus, Botany, Biology, Germ tube

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INFLUENCE OF DIFFERENT N FORMS ON SPORE GERMINATION AND HYPHAL GROWTH OF AM FUNGUS — Research Paper | ScholarLens