The Potential of Bacterial Strains of Luteovulum sphaeroides W22 and W47 for Producing δ-Aminolevulinic Acid to Improve Soil Quality, Growth and Yield of Saline-Irrigated Rice Cultivated in Salt-Contaminated Soil

The present study aimed to identify the abilities of δ-aminolevulinic acid (ALA) producing purple non-sulfur bacteria (PNSB), Luteovulum sphaeroides W22 and W47, reduce Na+ concentration, ameliorate soil fertility, nutrients uptake, growth yield rice on salt-contaminated soil. A two-factor experiment was conducted following a completely randomized block design. factors were frequency applying saline irrigation (zero, one, two, three four times) ALA-producing PNSB supplementation (applying only W22, W47 mixed + W47). results revealed that supplying mixture not reduced proline content but also increased plant height, number panicles per pot, percentage filled seeds, contents NH4+, PO43−, total N, P uptake grain yield. application Na in plants. L. decreased by 31.3% 27.2% condition 5‰ times.