Fig. 3From: Changes in the physiological activity of parenchyma cells in Dalbergia odorifera xylem and its relationship with heartwood formationMorphological changes in the staining of nuclei at different positions in the xylem. a-f are nuclei in parenchyma cells at different locations in the sapwood, g and h are locations in the transition zone, i is the location in the heartwood, and the nuclei are indicated by the arrows in figure dBack to article page