Colonization potential of bacteria in the rhizosphere
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TL;DR
Measurement of growth of known rhizosphere bacteria might be a useful index of the amount of available carbon and energy lost by growing roots.
Abstract
The effect of inoculum density on growth and steady-state populations of aPseudomonas sp., aMycoplana sp., and aCurtobacterium sp. in the rhizosphere if gnotobiotic barley plants was studied. Inoculation of sterile barley seedling at concentrations of about 1×103, 1×105 and 1×107 viable cells (mg dry wt root)−1 resulted in rapid colonization; maximum populations of about 5×107 viable cells (mg dry wt root)−1 developed in each case. We define this maximum population as the colonization potential. Measurement of growth of known rhizosphere bacteria might be a useful index of the amount of available carbon and energy lost by growing roots.