Plant & Cell Physiology
2019 vol60 (4)
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Plant mechanical strength contributes to lodging resistance and grain yield, making it an agronomically important trait in sorghum (Sorghum bicolor). In this issue, Li et al. (788–801) report that a mutation in brittle culm 1 (bc1) in sorghum leads to reduced mechanical strength, decreased cellulose content, and increased lignin content without altering overall plant morphology. SbBc1 encodes a COBRA-like protein that exhibits typical structural features of a glycosylphosphatidylinositol-anchored protein, homologous to rice OsBC1 and Arabidopsis thaliana AtCOBL4. The results provide further evidence for the role of COBRA-like genes in
cellulose biosynthesis in grasses.
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