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Arbuscular mycorrhizal fungi

An arbuscular mycorrhiza (plural mycorrhizas, a.k.a. endomycorrhiza) is a type of mycorrhiza in which the symbiont fungus (AM fungi, or AMF) penetrates the cortical cells of the roots of a vascular plant forming arbuscules. (Not to be confused with ectomycorrhiza or ericoid mycorrhiza.)

Arbuscular Mycorrhizal (AM) fungi form symbiotic associations with most land plants and interact with a wide range of soil microorganisms. We have been developing the user-friendly web interface ‘Arbuscular Mycorrhizal Fungi and Bacteria classification pipeline’ for rapid identification of fungi (including AM fungi) and bacteria from raw-sequence reads. The fungal reference database consists of the sequences of divergent D2 region of LSU including 524 AM fungal OTUs and 82,082 non-glomeromycotinan sequences obtained from 34 and 5 agricultural field across Japan and North America, respectively. The bacterial reference database consists of the sequences of 7,292 type strains and 300,706 sequences of V3-V4 regions of SSU. In the fungi mode of pipeline, users input fastq files of either paired-end (PE) or single-end reads generated by Illumina MiSeq. The pipeline connects PE reads and assigns to either AM fungal OTUs or non-glomeromycotinan fungal sequences through BLASTN searches against the database, and generates two OTU tables, ‘AM fungi assigned’ and ‘Other fungi assigned.’ Distinct characteristics of this pipeline is that each user can manage a private reference database, namely, user can construct their own database and add new OTUs/sequences found in 'unassigned reads' to the database. Since this pipeline provides the fixed OTU as an output, users can apply the obtained results for comparison between the independent experiments. This system would be applicable for the community analysis based different regions of ribosomal DNA and internal transcribed spacer regions.

The tremendous advances in research on mycorrhizal physiology and ecology over the past 40 years have led to a greater understanding of the multiple roles of AMF in the ecosystem. This knowledge is applicable to human endeavors of ecosystem management, ecosystem restoration, and agriculture.


PENGIRIMAN WANG GATEIO SYILING GMO

GERBANG LOGIK PADA DRAW.IO

AMfungi
release date sequence number
AM fungi other fungi
am00 2016/4/1 412 82229
am01 2018/2/20 417 82082
am02 2018/7/9 524 82082
am03 2018/9/11 524 82082
am04 2024/2/24 687 82082
ML tree of am03 (Niwa et al., 2018, PMID: 29743529) with 174 LSU rDNA (Delavaux et al., 2022, PMID:gateio app)
(*) Detailed analytical methods are indicated in the figure.
Bacteria
release date sequence number
strain identified unclassified
bct2016.0 2016/4/1 7293 300707

SYILING YANG DISOKONG GATE IO

* Fungi (D2 region of LSU)
FLd3: 5'-GTGAAATTGTTGAAAGGGAAACG-3'
FLR2: 5'-GTCGTTTAAAGCCATTACGTC-3'
reference: Niwa R. et al, Sci. Rep. 2018, 8:7419. ( PMID: 29743529 )

Acknowledgement:
This pipeline was made with the support by ACCEL project (JPMJAC1403) from Japan Science and Technology Agency.