Fig. 6

Changes in stem anatomy caused by mis-regulation of PeuBELL15 in Populus. a Transverse sections of stems of wild type, oxPeuBELL15, and bell15 mutant plants. b Xylem fiber elements of seventh internode. c Vessel elements of seventh internode. d Vessel size of seventh internode. e The phloem fibers and f average cell numbers in phloem fibers of wild type, oxPeuBELL15, and bell15 mutant plants. g Xylem cell files of wild type, oxPeuBELL15, and bell15 mutant plants