Effects of bacterial isolates separated from the rhizosphere of halophytic plants on plant growth

¹ National University of Uzbekistan named after Mirzo Ulugbek, University street, 4, Tashkent, 100174, Uzbekistan
² Jizzakh State Pedagogical University, Jizzakh, 130100, Uzbekistan

^* Corresponding author: author@email.org

Abstract

The plant development is affected by various factors such changes in soil and plant microflora, and the use of more chemical pesticides. The adaptation of halophytes to the harsh environment may be facilitated by the pertinent characteristics of microorganisms that reside in the intercellular space of the tissues of salt-tolerant desert plants. In addition to solving the primary issue of comprehending their function in adaptation, research on the rhizosphere bacteria of salt-tolerant plants is practically significant for the production of biofertilizers that support the growth of agricultural crops in saline soils. In this paper, plant growth-promoting rhizobacteria (PGPR) are in close association with roots to enhance host plant adaptation to their environment and the relative abundance of Arthrobacter, Bacillus, Massilia, and Devosia in the rhizosphere and Bacillus, Oceanobacillus, Lactococcus, and Massilia in roots during tillering and ripening stages and these genera are described as important rhizobacteria. 70 bacterial isolates were isolated from the rhizosphere of different plants growing in saline soils. 22 isolates were identified as salt-tolerant based on their growth characteristics in feeds with 15-20% NaCl and were selected as a result of one-step screening. Antifungal activity of 22 selected bacterial isolates against pathogenic fungi was identified. It was found that isolates 5, 13, 3.1, 34.1, 19, 10, 4 and 30 are more active than others and have a better ability to inhibit pathogenic fungi.