De Novo Sequencing and Comparative Transcriptome Analyses Provide First Insights into Polysaccharide Biosynthesis During Fruiting Body Development of Lentinula edodes
- Author: mycolabadmin
- 2021-07-13
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Summary
This research examined how shiitake mushrooms produce beneficial compounds called polysaccharides during different growth stages. These compounds are important for human health and medicine. The scientists mapped out the genetic instructions that the mushroom uses to make these beneficial molecules.
Impacts on everyday life:
– Helps develop more effective medicinal mushroom supplements
– Could lead to improved cultivation methods for higher-quality shiitake mushrooms
– May enable production of mushroom-derived medicines with stronger health benefits
– Could reduce the cost of mushroom-based therapeutic compounds
– Advances our understanding of how to optimize mushroom growing conditions
Background
Polysaccharides isolated from Lentinula edodes (shiitake mushroom) are known for their medicinal properties including antitumor, immunomodulating, antioxidant, anti-inflammatory, antimicrobial and metabolic regulatory activities. However, the precise molecular mechanisms of polysaccharide biosynthesis in L. edodes remain unclear.
Objective
To investigate the molecular mechanisms of polysaccharide biosynthesis during different developmental stages of L. edodes fruiting bodies through de novo sequencing and comparative transcriptomic analysis using high-throughput Illumina RNA-sequencing.
Results
High-quality clean reads (57.88, 53.17, 53.28, and 47.56 million for different growth stages) and mapping ratios ranging from 84.75 to 90.11% were obtained. In total, 11,493 (96.56%) unigenes and 18,924 (97.46%) transcripts were successfully annotated in five public databases. The researchers identified key genes involved in polysaccharide biosynthesis pathways and characterized four polysaccharide fractions (KS1P30, KS2P30, KS3P30, and KS4P30) that showed good immune activity in vitro. All were β-glucopyranose with high molecular weight, with glucose as the main monosaccharide component.
Conclusion
The study provided insights into the possible mechanisms involved in polysaccharide biosynthetic pathways in L. edodes fruiting bodies and identified candidate genes that could be used as resources for biotechnology and molecular breeding to regulate polysaccharide biosynthesis.
- Published in:Frontiers in Microbiology,
- Study Type:Genomic Analysis,
- Source: 10.3389/fmicb.2021.627099