Fig. 6From: Modelling wood formation and structure: power and limits of a morphogenetic gradient in controlling xylem cell proliferation and growthGrowth of a cell file regulated by a diffusible signal. a Without decay and with negligible dilutive effect. The growth is exponential. b With decay and negligible dilutive effect. The growth becomes linear after an initial exponential phase. c With non-negligible dilutive effect and without decay. Again, the growth becomes linearBack to article page