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23. Mycorrhizal Associations between Helvella bachu and Its Host Plants.

Author

Wei, Caihong, Liu, Mengqian, Hu, Jianwei, Zhang, Lili, and Dong, Caihong

Subjects
HOST plants, ECTOMYCORRHIZAL fungi, FRUITING bodies (Fungi), POPLARS, EDIBLE fungi, ENDANGERED species
Abstract

Helvella bachu, a prized edible and medicinal fungus, is primarily found in the forests of Populus euphratica, an ancient and endangered species crucial to desert riparian ecosystems. Despite extensive efforts, the isolation of pure cultures and cultivation of fruiting bodies of H. bachu have remained elusive. While some species within the Helvella genus have been confirmed as ectomycorrhizal fungi, others have been considered either saprotrophic or mycorrhizal. By integrating field observations of H. bachu habitat, macro- and micro-anatomical examination of plant root tips, and molecular data from fruiting bodies, mycorrhizae, and host plants, it has been confirmed that H. bachu forms ectomycorrhizal associations with Populus trees. The mycorrhiza of H. bachu displays a light earth color with a curved smooth cylindrical shape. It features a thick mantle and the presence of a Hartig net, accompanied by a small amount of epitaxy mycelia. Morphological observation of the root tips requires meticulous handling, and the paraffin section technique has yielded noteworthy results. Host plants encompass four Populus species, including P. euphratica, P. pruinosa, P. nigra, and P. alba var. pyramidalis (synonym Populus bolleana). A conservation area was established within the young P. euphratica forest at Tarim University, resulting in a 14.75% increase in the quantity of fruiting bodies during the second year. Establishing a conservation area and in situ propagation of H. bachu holds economic and ecological implications. This study will contribute to the conservation of resources related to H. bachu and P. euphratica. [ABSTRACT FROM AUTHOR]

Published
2024
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27. Lineage-specific genes are clustered with HET-domain genes and respond to environmental and genetic manipulations regulating reproduction in Neurospora

Author

Wang, Zheng, primary, Wang, Yen-Wen, additional, Kasuga, Takao, additional, Lopez-Giraldez, Francesc, additional, Zhang, Yang, additional, Zhang, Zhang, additional, Wang, Yaning, additional, Dong, Caihong, additional, Sil, Anita, additional, Trail, Frances, additional, Yarden, Oded, additional, and Townsend, Jeffrey P., additional

Published
2023
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30. Telomere-to-Telomere Genome Assembly of Tibetan Medicinal Mushroom Ganoderma leucocontextum and the First Copia Centromeric Retrotransposon in Macro-Fungi Genome.

Author

Wang, Miao, Meng, Guoliang, Yang, Ying, Wang, Xiaofang, Xie, Rong, and Dong, Caihong

Subjects
GANODERMA, GENOMES, TIBETANS, MUSHROOMS, NUCLEOTIDE sequencing, CHROMOSOMES
Abstract

A complete telomere-to-telomere (T2T) genome has been a longstanding goal in the field of genomic research. By integrating high-coverage and precise long-read sequencing data using multiple assembly strategies, we present here the first T2T gap-free genome assembly of Ganoderma leucocontextum strain GL72, a Tibetan medicinal mushroom. The T2T genome, with a size of 46.69 Mb, consists 13 complete nuclear chromosomes and typical telomeric repeats (CCCTAA)n were detected at both ends of 13 chromosomes. The high mapping rate, uniform genome coverage, a complete BUSCOs of 99.7%, and base accuracy exceeding 99.999% indicate that this assembly represents the highest level of completeness and quality. Regions characterized by distinct structural attributes, including highest Hi-C interaction intensity, high repeat content, decreased gene density, low GC content, and minimal or no transcription levels across all chromosomes may represent potential centromeres. Sequence analysis revealed the first Copia centromeric retrotransposon in macro-fungi genome. Phylogenomic analysis identified that G. leucocontextum and G. tsugae diverged from the other Ganoderma species approximately 9.8–17.9 MYA. The prediction of secondary metabolic clusters confirmed the capability of this fungus to produce a substantial quantity of metabolites. This T2T gap-free genome will contribute to the genomic 'dark matter' elucidation and server as a great reference for genetics, genomics, and evolutionary studies of G. leucocontextum. [ABSTRACT FROM AUTHOR]

Published
2024
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40. Single Atom‐Doped Nanosonosensitizers for Mutually Optimized Sono/Chemo‐Nanodynamic Therapy of Triple Negative Breast Cancer

Author

Chen, Qiqing, primary, Zhang, Min, additional, Huang, Hui, additional, Dong, Caihong, additional, Dai, Xinyue, additional, Feng, Guiying, additional, Lin, Ling, additional, Sun, Dandan, additional, Yang, Dayan, additional, Xie, Lin, additional, Chen, Yu, additional, Guo, Jia, additional, and Jing, Xiangxiang, additional

Published
2023
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46. Safe-Harbor-Targeted CRISPR/Cas9 System and Cmhyd1Overexpression Enhances Disease Resistance in Cordyceps militaris

Author

Liu, Qing, Meng, Guoliang, Wang, Miao, Li, Xiao, Liu, Mengqian, Wang, Fen, Yang, Ying, and Dong, Caihong

Abstract

Fungal disease of mushroomCordyceps militaris(CM) caused byCalcarisporium cordycipiticola(CC) is destructive to fruiting body cultivation, resulting in significant economic loss and potential food safety risks. CRISPR/Cas9 genome editing has proven to be a powerful tool for crop improvement but seldom succeeded in mushrooms. Here, the first genomic safe-harbor site, CmSH1locus, was identified in the CM genome. A safe-harbor-targeted CRISPR/Cas9 system based on an autonomously replicating plasmid was designed to facilitate alien gene integration at the CmSH1locus. Cmhyd1, one of the hydrophobin genes, was confirmed as a defensive factor against CC infection, and Cmhyd1overexpression by this system showed enhancement of disease resistance with negligible effect on the agronomic traits of CM. No off-target events and residues of plasmid sequence were tested by PCR and genome resequencing. This study provided the first safe harbor site for genetic manipulations, a safe harbor-targeted CRISPR/Cas9 system, and the first disease-resistant gene-editing breeding system in mushrooms.

Published
2023
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