Phosphorus fertilization effects on carboxylate exudation and microbial communities in the rhizosphere of wheat and canola genotypes differing in P efficiency when grown in acidic soils

Results showed the growth rate and carboxylates in wheat and canola genotypes differing in P-efficiency using two acidic soils with low P availability. The preliminary tests showed wheat genotypes Westonia and Janz and canola genotypes Drum and Outback differ in P-efficiency, with Westonia and Drum being relatively P-efficient. We found canola metatranscriptomes differed between the two genotypes and were significantly different between the P rates. Different canola and wheat genotypes appear to favour different bacterial taxa based on the relative abundance analysis. Metabolic and functional pathways were significantly and positively correlated with microorganisms, carboxylates, pH and plant dry weight.