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Summary of the four Poisson processes used in the stochastic model.
| Event type | Poisson event rate | Effect on state variables |
|---|---|---|
| Tip growth | λGT | NY → NY + 1 |
| Node branching | λBNY | T → T + 1; NO → NO + 1; NY → NY − 1 |
| Node ageing | λANY | NY → NY − 1; NO → NO + 1 |
| Basal node death | λDλANB/(λA + λB) | NO → NO − 1 |
| Basal node death exposing an additional basal node | λDλBNB/(λA + λB) | NO → NO − 1; NB → NB + 1 |
