Bioenergy crop production and management
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Peer reviewed
Abstract
Abstract
Silphium perfoliatum is a high-yielding perennial bioenergy crop distinguished by exceptional drought resilience; however, the genomic mechanisms underpinning these traits remain elusive. Here, we present a high-quality, chromosome-level genome assembly of S. perfoliatum (7.33 Gb), revealing a genomic landscape dominated by LTR retrotransposons (LTR-RTs), which constitute 74.32% of the assembly. Comparative and evolutionary analyses reveal that genome expansion in S. perfoliatum is primarily driven by recent transposable element bursts and ancient whole-genome duplication events, which together have reshaped gene family composition and regulatory potential. Notably, expansion and diversification of the cellulose synthase ( CesA / Csl ) gene superfamily suggest lineage-specific remodeling of cell wall biosynthetic capacity associated with biomass formation. Drought-induced transcriptomic profiling further revealed systemic metabolic reconfiguration that prioritizes redox homeostasis, osmotic protection, and cell wall remodeling. Co-expression analysis identified a DREB2A-like AP2/ERF transcription factor as a candidate regulatory hub. Collectively, this study clarifies the genomic architecture of S. perfoliatum and identifies candidate genetic targets for developing climate-resilient lignocellulosic bioenergy feedstocks.
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@article{Chi2026chromosome,
title = {The chromosome-level genome of Silphium perfoliatum reveals the genetic basis of drought resilience and lignocellulosic biomass accumulation},
author = {Xiaofeng Chi and Shifeng Li and Wenpeng Chen and Ronglian Chen and Mingze Xia and Yan Li and Xiaohui Zhao and Shilong Chen},
journal = {Industrial Crops and Products},
year = {2026},
doi = {10.1016/j.indcrop.2026.123887},
url = {https://doi.org/10.1016/j.indcrop.2026.123887}
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