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- W4254018022 abstract "Abstract Background The development of biomass crops aims to meet industrial yield demands, in order to optimize profitability and sustainability. Achieving these goals in an energy crop like sugarcane relies on breeding for sucrose accumulation, fiber content and stalk number. To expand the understanding of the biological pathways related to these traits, we evaluated gene expression of two groups of genotypes contrasting in biomass composition. Results First visible dewlap leaves were collected from 12 genotypes, six per group, to perform RNA-SEq. We found a high number of differentially expressed genes, showing how hybridization in a complex polyploid system caused extensive modifications in genome functioning. We found evidence that the variation between these groups may be partly due to the expansion of the Saccharum genomes by differential transposition and defense related genes. Genotypes within both biomass groups showed substantial variability in genes involved in photosynthesis. However, most genes coding for photosystem components or those coding for phosphoenolpyruvate carboxylases (PEPCs) were upregulated in the high biomass group. Sucrose synthase (SuSy) coding genes were upregulated in the low biomass group, showing that this enzyme class can be involved with sucrose synthesis in leaves, similarly to sucrose phosphate synthase (SPS) and sucrose phosphate phosphatase (SPP). Genes in pathways related to biosynthesis of cell wall components and expansins coding genes showed low average expression levels and were mostly upregulated in the high biomass group. Conclusions Together, these results show differences in carbohydrate synthesis and carbon partitioning in the source tissue of distinct phenotypic groups. Our data from sugarcane leaves revealed how hybridization in a complex polyploid system resulted in noticeably different transcriptomic profiles between contrasting genotypes." @default.
- W4254018022 created "2022-05-12" @default.
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- W4254018022 date "2020-07-16" @default.
- W4254018022 modified "2023-09-28" @default.
- W4254018022 title "Differential Expression in Leaves of Saccharum Genotypes Contrasting in Biomass Production Provides Evidence of Genes Involved in Carbon Partitioning" @default.
- W4254018022 doi "https://doi.org/10.21203/rs.3.rs-41475/v1" @default.
- W4254018022 hasPublicationYear "2020" @default.
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