Characteristics of Organic Acid Secretion Associated with the Interaction between <i>Burkholderia multivorans</i> WS-FJ9 and Poplar Root System.

In our study, effects of exogenous IAA at different concentrations on the secretion of organic acids by poplar root system and strain WS-FJ9 and effect of IAA at the same concentration on the secretion of organic acids by poplar root system in poplar nutrient solutions with different phosphorus levels were also investigated, from which it was shown that both the contents of malonic acid and gluconic acid in poplar nutrient solution revealed extremely significant linear correlation with the amount of added IAA within IAA concentration range of 5-40 mg·L −1 under phosphorus stress condition; while the amount of added IAA had no effect on the secretion of organic acids in strain WS-FJ9, induction of acid secretion by IAA in poplar root system was not affected

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