<prompt> Gadzira shanduro yakaoma zvikuru yemutsara uyu Phloem inotangira yakataurwa kuti ndiyo nzvimbo huru yekuunganidza.  <response>: Chokwadika, shanduro yakaoma kunzwisisa zvikuru yemutsara wacho ndeiyi The precursor phloem was suggested to be the main area of accumulation but caffeine was also determined to be present within the precursor xylem, in a lower concentration. 