Rapid root colonization

Localized release of root exudates in apical root zones with a low density of microbial colonization and secretion peaks over a limited period of time may counteract rapid microbial degradation and thereby increase the rhizosphere concentrations of exudated compounds for mobilization of nutrients (Romheld, 1991). 

It has been shown that welds provide unique environments for the colonization of SRB with the subsequent production of sulfides that affect the weld seam surface of the heat-affected zone. Exposure of sulfide-derived surfaces to fresh, aerated seawater resulted in rapid spalling on the downstream side of weld seams. The bared surfaces became anodic to the sulfide-coated weld root, initiating and accelerating localized corrosion. (Dexter)5... 

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