Effect of N concentration and N source on root colonization by Pseudomonas fluorescens 2-79RLI

摘要: Wheat (Triticum aestivum L.) was grown in nutrient solution with low or high N supply (NH4NO3 as source). To further evaluate the influence of form and its interaction pH, wheat plants were NH 4 + NO 3 - either an conventional a which pH maintained at 6.5 using pH-stat system. The inoculated Pseudomonas fluorescens 2-79RLI, genetically modified bacterium that contains lux genes activated by ribosomal promoter. Cell numbers physiological status P. 2-79RLI (length lag phase bioluminescence) rhizosphere determined root tip lateral zone. Nitrogen deficiency decreased both plant growth colonization while it had no effect on not affected nitrogen deficiency. Ammonium nutrition increased zone when allowed to change according provided. Under these conditions, higher than tip. In contrast, source 6.5. It is concluded stimulation solution, constant may be due leakage solutes into result impaired exudate retention H+ concentration apoplast.