TABLE 1.

Number and size of bacterial aggregates observed on bean leaf surfaces through time following inoculation of P. syringae strain B728a

Days since inoculationLeafTotal leaf area observed (mm2)Bacterial aggregatesArea of leaf covered (%)Cells/cm2 (106)Variance/mean ratio
No. observedNo. of cells
Mean ± SERangea
Preinoculation10.6692,2796.7 ± 0.21080.980.611
20.6325317.5 ± 0.61310.270.223
30.8102,9496.3 ± 0.11181.000.69
010.6686,2687.8 ± 0.12013.071.815
20.4302,4466.8 ± 0.21351.651.016
30.5703,7647.1 ± 0.21782.001.214
210.4385,32610.0 ± 0.46444.993.073
20.5196,14810.0 ± 0.41,3754.883.087
30.3303,14711.5 ± 1.02,5224.542.7268
810.3515,17712.5 ± 2.211,3067.394.62,057
20.4415,53427.4 ± 2.77,96012.958.61,489
30.4626,35431.3 ± 3.510,20315.7110.82,502
  • a Range of bacterial aggregate sizes (number of cells), which also corresponds to the total number of cells observed in the largest aggregates.