TABLE 2.

Number and size of bacterial aggregates observed that were associated with the different anatomical features of a bean leaf at 2 and 8 days following inoculation of P. syringae strain B728a

Bacterial aggregate location% of the leaf surfaceNo. and size (no. of cells) of bacterial aggregates on leaves at indicated day after inoculationa
28
nMeanb ± SEnMean ± SE
Glandular trichomes0.6 ± 0.193311.4 ± 38.51141,092.3 ± 254.1
Veins7.3 ± 0.420301.2 ± 89.834705.6 ± 214.6
Hooked trichomes1.2 ± 0.210204.1 ± 19.526409.8 ± 71.7
Nondifferentiated epidermal cells73.8 ± 0.827117.7 ± 2.9163304.1 ± 41.7
Stomates17.1 ± 0.300
Total100150268.0 ± 27.3337619.4 ± 92.8
  • a Only aggregates with 100 cells or more were included in this study.

  • b Mean aggregate size values represent the inferred number of cells calculated from the area of a leaf covered with a given aggregate and an average cell size of 1.5 μm2.