Fig. 9.

Proposed model for the interaction of AN1, sucrose, and sucrose metabolic genes to modulate phenylpropanoid metabolism. Sucrose stimulates AN1 expression, which with bHLH1 and WD40 regulates phenylpropanoid expression, but also sucrolytic genes that can provide carbon for induced phenylpropanoid metabolism and decrease sucrose. The red line indicates the cleavage of sucrose. Solid green lines indicate targets stimulated by AN1. The dashed green arrow shows AN1 expression stimulated by sucrose concentrations, which can decrease in response to AN1 expression.