Artificially coloured pictures of a Norway spruce tree (Picea abies (L.) Karst.) at age 5 and at age 10, generated by Grogra. Used L system: epi2.lsy.

Green: recently formed shoots, yellow: older shoots which will remain intact, magenta: older shoots which will die next year

These virtual trees were used for the calculation of water potential profiles in the branching system of the crown, using the software HYDRA.

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