Abstract
True morels (Morchella spp.) are edible, medicinal mushrooms which have recently been artificially cultivated in China but stable production remains a problem. Here, we describe complete and comprehensive transcriptome of Morchella importuna at the stages of vegetative mycelium (VM), initial sclerotium (IS) and mature sclerotium (MS) by deep transcriptional sequencing and de novo assembly for the first time and which will potentially provide useful information for improving its cultivation. A total of 26,496 genes were identified with a contig N50 length of 1763 bp and an average length of over 1064 bp. Additionally, 11,957 open reading frames (ORFs) were predicted and 9676 of them (80.9%) were annotated. The 2605 differentially expressed genes (DEGs) identified by gene expression clustering were mainly involved with energy metabolism and could be divided into three broad clusters, of which genes in cluster_1 and cluster_2 were involved in the metabolic process of carbohydrate, polysaccharide, hydrolase, caprolactam, beta-galactosidase, and disaccharide, respectively. Genes in cluster_3 were the largest category, mainly identified with the catalytic activity and transporter activity. Overall, the enzymes involved in the carbohydrate metabolism were highly expressed, and the CAZyme (carbohydrate-active enzyme) genes were significantly expressed within cluster_3. For expression verification, 16 CAZYme genes were selected for qRT-PCR, and the results suggested that the catabolism of carbohydrates occurs mainly in the vegetative mycelium stage, and the anabolism of the energy-rich substances is the main event of mycelial growth and sclerotial morphogenesis of M. importuna.
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Acknowledgements
This study was supported by the Key Technologies R & D Program of Henan Province (No. 172102310553), the Major Technology Innovation Projects of Hubei Province (Grant No. 2016ABA100) and the Industry (Agriculture) Science and Technology Program (Grant No. 201503107).
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WL and PH conceived and designed the experiments. YC and WL prepared the experiment materials. WL and YC carried out the experiments and collected the data. Data analysis was carried out by LC and WL. WL and PH wrote the manuscript. PH and YB provided intellectual input and revised the manuscript. All authors have read and approved the final manuscript.
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Liu, W., Cai, Y., He, P. et al. Comparative transcriptomics reveals potential genes involved in the vegetative growth of Morchella importuna. 3 Biotech 9, 81 (2019). https://doi.org/10.1007/s13205-019-1614-y
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DOI: https://doi.org/10.1007/s13205-019-1614-y