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Canopy Microenvironments and Applied Bacteria Population Dynamics in Shaded Tall Fescue

^a University of Nebraska-Lincoln, 448 Plant Sciences Hall, Lincoln, NE 68583-0722 USA
^b Univ. of Nebraska-Lincoln, 406 Plant Sciences Hall, Lincoln, NE 68583-0722 USA
^c Univ. of Nebraska-Lincoln, 377 Plant Sciences Hall, Lincoln, NE 68583-0724 USA

View larger version (20K): [in a new window]   Fig. 1 Diagram of a turfgrass shoot illustrating the division at 4-cm height and the leaf collar separating upper and lower foliage parts in the population number and colonization site assays, respectively

View larger version (33K): [in a new window]   Fig. 2 Population levels, measured by dilution plating of Bacillus megaterium strain B153-2-2, Stenotrophomonas maltophilia strain C3, and Enterobacter cloacae strain EcCT-501 on tall fescue foliage in shaded and full-sun turf maintained at an 8-cm height in 1994 and in 1995. Data are presented for shade, sampling time, and their interaction. Vertical bars represent standard error of the mean

View larger version (33K): [in a new window]   Fig. 3 Numbers of colonization sites as measured by shoot imprinting for Bacillus megaterium strain B153-2-2, Stenotrophomonas maltophilia strain C3, and Enterobacter cloacae strain EcCT-501 on tall fescue foliage in shaded and full-sun turf maintained at an 8-cm height in 1994 and in 1995. Data are presented for shade, sampling time, and their interaction. Vertical bars represent standard error of the mean

View larger version (21K): [in a new window]   Fig. 4 Population levels of Bacillus megaterium strain B153-2-2, Stenotrophomonas maltophilia strain C3, and Enterobacter cloacae strain EcCT-501 in the top and bottom 4-cm sections of a tall fescue canopy maintained at a height of 8 cm in 1995. Data are presented for foliage part and the interaction with time. Vertical bars represent standard error of the mean

View larger version (32K): [in a new window]   Fig. 5 Number of colonization sites of Bacillus megaterium strain B153-2-2, Stenotrophomonas maltophilia strain C3, and Enterobacter cloacae strain EcCT-501 detected by shoot imprinting in the top (above the leaf collar) and bottom (below leaf collar) regions of a tall fescue canopy maintained at a height of 8 cm in 1994 and in 1995. Data are presented for foliage part, time, and their interaction. Vertical bars represent standard error of the mean