Microbiome differences in sugarcane and metabolically engineered oilcane accessions and their implications for bioenergy production
Jihoon Yang, Thanwalee Sooksa-nguan, Baskaran Kannan, Sofia Cano-Alfanar, Hui Liu, Angela Kent, John Shanklin, Fredy Altpeter and Adina Howe
This work is published.
The raw data (16S rRNA and ITS rRNA sequences) for this study are available at National Center for Biotechnology Information (NCBI) Sequence Read Archive PRJNA892137.
Yang, J., Sooksa-nguan, T., Kannan, B. et al. Microbiome differences in sugarcane and metabolically engineered oilcane accessions and their implications for bioenergy production. Biotechnol Biofuels 16, 56 (2023). https://doi.org/10.1186/s13068-023-02302-6
Oilcane is a metabolically engineered sugarcane (Saccharum spp. hybrid) that hyper-accumulates lipids in its vegetable biomass to provide an advanced feedstock for biodiesel production. The potential impact of hyper-accumulation of lipids in vegetable biomass on microbiomes and the consequences of altered microbiomes on plant growth and lipid accumulation have not been explored so far. Here, we explore differences in the microbiome structure of different oilcane accessions and non-modified sugarcane. 16S SSU rRNA and ITS rRNA amplicon sequencing were performed to compare the characteristics of the microbiome structure from different plant compartments (leaf, stem, root, rhizosphere, and bulk soil) of four greenhouse-grown oilcane accessions and non-modified sugarcane. Significant differences were only observed in the bacterial microbiomes. In leaf and stem microbiomes, more than 90% of the entire microbiome of non-modified sugarcane and oilcane was dominated by similar core taxa. Taxa associated with Proteobacteria led to differences in the non-modified sugarcane and oilcane microbiome structure. While differences were observed between multiple accessions, accession 1566 was notable in that it was consistently observed to differ in its microbial membership than other accessions and had the lowest abundance of taxa associated with plant-growth-promoting bacteria. Accession 1566 is also unique among oilcane accessions in that it has the highest constitutive expression of the WRI1 transgene. The WRI1 transcription factor is known to contribute to significant changes in the global gene expression profile, impacting plant fatty acid biosynthesis and photomorphogenesis. This study reveals for the first time that genetically modified oilcanes associate with distinct microbiomes. Our findings suggest potential relationships between core taxa, biomass yield, and TAG in oilcane accessions and support further research on the relationship between plant genotypes and their microbiomes.
This analysis represented 16S rRNA and ITS rRNA annotation using DADA2, functional annotation using PICRUST2, and statistic analysis using R.
This work was funded by the DOE Center for Advanced Bioenergy and Bioproducts Innovation (U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research under Award Number DE-SC0018420). Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the U.S. Department of Energy.