**7.2. Tuber**

The transcriptome of tuber tissue showed the presence of several transcripts that are specific for tuber. Around 90 genes were co-expressed in tuber, including the genes involved in starch biosynthesis pathway such as *glucose 6-phosphate/phosphate translocator* and storage proteins such as *patatin* [23]. The *APETALA* and *WRKY* transcription factors were specifically found to be expressed in tubers. Further, using DGE profiling, the photoperiodic tuberization-specific genes were identified and suggested that the potato tuberization may be controlled by the genes associated with flowering time in other plant species [25]. These data contribute toward the development of powerful resources that could be used in candidate gene mining for important agricultural traits.
