Effect of soil inoculation with vesicular‐arbuscular mycorrhizal fungi and either phosphate rock dissolving bacteria or thiobacilli on dry matter production and uptake of phosphorus by tomato plants
Year: 1986
Type: article
Abstract: The effect of inoculating soil with phosphate rock dissolving bacteria (PRDB) or sulphur (S) oxidising micro‐organisms on shoot dry matter (DM) production and phosphorus (P) uptake of a tomato cultivar ( Lycopersicon esculentum Mill, Virosa NT2) colonised with the vesicular‐arbuscular mycorrhizal (V AM) fungus Gigaspora margarita (Becker & Hall) was determined in a pot trial. Inoculation with PRDB did not affect shoot DM production and P uptake. Shoot DM and P uptake were also not increased when V AM and PRDB were inoculated together. PRDB were temporarily detrimental to shoot DM production. The PRDB population declined soon after soil inoculation but recovered after addition of a phosphate‐free nutrient solution. It is suggested that soil bacteriostasis and a deficiency of easily metabolisable carbon compounds were the causes of the failure of the PRDB culture. Thiobacilli inoculation appeared to be detrimental to shoot DM production, and a combined inoculation of V AM and thiobacilli did not cause any significant increase in shoot DM. The resident thiobacilli were efficient S oxidisers and it is suggested that no inoculation of thiobacilli was required. The reasons for the adverse effects of thiobacilli inoculation are not known.
Authors: A. Lee, D.J Bagyaraj
Institution: University of Agricultural Sciences, Bangalore
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2024398786