“…Radioactive halogenated glucose analogs, such as [ 18 F]‐2‐fluoro‐2‐deoxy‐glucose (FDG), [9] [ 18 F]‐3‐fluoro‐3‐deoxy‐glucose [9c] and I 123 and 125 I‐labeled glucose analogs iodinated in positions 2, 3, 4 or 6, [10] have been used as positron emission tomography (PET) contrast agents in clinical oncology and neuroimaging [11] . Due to metabolic and structural (e. g., steric hindrance) considerations, only the glucose moiety halogenated at position C2 has been used for the in‐vivo assessment of the glucose transport and uptake rate [10a,b, 12] . For example, FDG has been used in combination with PET to image plants, [13] explore the uptake and distribution of glucose in Sorghum bicolor (L.) Moench, [14] photoassimilate the translocation in Arabidopsis thaliana [15] and to biosynthesize glycosides [16] .…”