Fig. 4

Processes shaping bacterial colonization of leaves of the A. thalianagenotypes Col-0, NG2, and PB depend on both inoculation time and genotype. A The relative importance of stochastic processes in the colonization of the leaves of plants live-inoculated at ID0, ID7, ID14, or heat-killed inoculated. Stochasticity represents the sum of dispersal limitation, homogenous dispersal, and drift, but was consistently dominated by dispersal limitation. Deterministic processes (homologous and heterologous selection), as well as an independent measure of stochasticity (pNST) are shown in Figure S10. B. Assembly processes at the level of taxonomic bins, shown for Col-0, and trees for other genotypes are shown in Figure S11. The tree is annotated with, from inside to outside: colored dots representing the majority taxonomy of each bin, A barchart showing for plants inoculated at ID0 the relative contribution of each community assembly process for each bin (DL: dispersal limitation, DR: drift, HD: homogenizing dispersal, HeS: heterogeneous selection, HoS: homogeneous selection), and A heatmap showing the change in the relative importance of each assembly process for each bin between plants inoculated at ID0 and those inoculated at ID14 (yellow means a given process is more important at ID0, dark blue is more important at ID 14). The labeled taxa are those mentioned in the text that were selected deterministically at ID0 and stochastically at ID14 (homologous selection increased by at least 20% to reach > 50% total contribution in D0). The plant genotypes where this difference was observed are labeled