“…Indeed, previous results revealed that the reduced growth of soybean roots caused by hydroxycinnamic derivative allelochemicals was associated with an effective performance of the phenylpropanoid pathway and premature cell wall lignification. [21][22][23] Increases in the content of H, G and S monomers and HCGCS, which is a reasonable estimate of the degree of condensation of the lignin polymer, 7 suggest that structural properties of the cell wall can be adversely affected by BOA. It is clear that such effects can significantly limit cell expansion and compromise plant growth.…”