Fig. 5. Expression of LIP genes in wild type. RNA in situ hybridization with a LIP1 probe on wild-type longitudinal sections. (A) Young bracts of an inflorescence apex at stage 1 showing expression of LIP1. Young floral bud at stage 4 (B) and stage 6 (C) showing LIP1 expression in floral tissues (arrows). (D) Ventral petal of a stage 10 floral bud showing localized expression (marked with bracket) of LIP1 within the furrow (arrow) destined to form the lips and lower palate. B, bracts; s, sepal; p, petal; st, stamen; and c, carpel. Scale bar = 100 µm.