Figure 5
Histological expression profiles of AtSWEET4.
A construct of ProAtSWEET4-GUS was expressed in Arabidopsis plants and GUS activity was monitored during the reporter plant development. (A) A five-day-old seedling showing GUS staining. (B) GUS activity in the stele of roots. (C) GUS activity detected in mature zone of roots but not in root tip. (D) GUS staining detected in the leaf vein network. (E) GUS staining detected in mature flowers but not in young flower buds. (F) GUS staining in petal vein network. (G) GUS activity in anther filaments. (H) GUS staining is not detected in pistil. (I) GUS staining is detected in anther filaments but not in anthers. (J) GUS activity in the cross section of a mature flower. (K) GUS staining is not detected in seeds and silique. Scale bars: 1 mm.
