Close relationships between hrp gene expression and sugars/sugar metabolism in Xanthomonas oryzae pv. oryzae

Sucrose exudation from host plant cells induced by TAL (transcription activator-like) effectors, proteins secreted through the type III secretion system (T3SS), is essential for virulence of a rice bacterial pathogen Xanthomonas oryzae pv. oryzae. Additionally, we have found that xylose is an essential sugar for the expression of hrp genes encoding components of the T3SS, and that regulators of the xylan/xylose utilization and the galactose metabolism are both involved in the regulation of hrp gene expression. Here, we briefly review relationships between hrp gene expression and sugars/sugar metabolism in X. oryzae pv. oryzae.

Automated summary

Sucrose exudation induced by TAL effectors is essential for the virulence of X. oryzae pv. oryzae. Xylose is crucial for the expression of hrp genes, and regulators of xylan/xylose utilization and galactose metabolism are involved in hrp gene regulation. This review discusses the relationship between hrp gene expression and sugars/sugar metabolism in X. oryzae pv. oryzae.