Fig. 6. Change versus conservation of CRC regulation. (A-E) Expression of pGhCRC(8kb)::GUS in Arabidopsis. GUS expression is detected in the vasculature of the hypocotyl and cotyledons in 1-week-old seedlings (A), in rosette leaves (B) and in cauline leaves (C) of older plants. GUS expression is also detected in the pedicels and receptacles of flowers (D), and the styles and stigma of gynoecia (E). (F) pLaCRC::GUS in the Arabidopsis nectary in a stage 15 flower. (G) pAtCRC::GhCRC is sufficient to rescue the nectary and carpel phenotypes in a crc-1. GUS expression in the nectary is provided by a pAtCRC::GUS transgene. (H) pAtCRC::GUS in Nicotiana tabacum flower. GUS expression is in the nectary disc (arrow) and style of the gynoecium.