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BEATTIE remediation, plant roots promote bacterial access to soil contaminants by moving them toward the roots in the transpiration stream and providing bacterial access to soil layers that may otherwise be impermeable. Bacterial degradation activities are likely stronger in the rhizosphere than in bulk soil because of 1) high bacterial densities and metabolic activity, due in part to the exudation of up to 35% of the plant photosynthate into the rhizosphere, 2) the induction of bacterial degradation pathways by secondary plant compounds released from roots, and 3) potential cometabolism of the secondary plant compounds and the pollutants.

BEATTIE blossom, called a bligtht, or as a sunken area surrounded by living tissue, called a canker. Bacteria in the genera Xanthomonas and Pseudomonas cause most bacterial spots and blights, as well as many streaks and stripes diseases. Strains in these genera typically exhibit a narrow host range and thus are classified into many pathovars. For example, P. syringae has been subdivided into at least 50 pathovars and X. axonopodis into at least 34. , 1995), the species X. campestris, alone, was subdivided into over 140 pathovars.

149 64 63 62 64 GC 65 8,317 6,205 7,272 4,637 Prot 4,273 0 2 2 0 P1 0 1 3 2 2 rRNA 2 52 60 54 72 %Fn 63 1 Year, year in which sequenced was published; Mb, total size of the genome; GC, %G+C content; Prot, number of predicted proteins; Pl, number of plasmids; rRNA, number of rRNA operons; % Fn, % ORFs with a putative function at the initial time of the report; data is from The Institute for Genomic Research (TIGR) or from the references shown in Table 5. 2 NR, not reported. Sinorhizobium meliloti 2001 Organism Xanthomonas campestris pv.