The purpose of the present research was to study the diversity of bacterial endophytes inhabiting the halophytic plant black saxaul (Haloxylon aphyllum Minkw.). A total of 20 bacterial isolates were isolated from tissues of black saxaul and identified based on their 16S rRNA genes analysis and comparison with the closest relatives registered in GenBank nucleotide data bank from the National Centre for Biotechnology Information. The endophytes were checked for plant growth-promoting activity toward cucumber plants and the strains Bacillus amyloliquefaciens HAPH2, Priestia endophytica HAPH5, Bacillus subtilis HAPH7, Bacillus toyonensis HAPH8, Halomonas sulfidaeris HAPH11, Isoptericola halotolerans HAPH12, Planomicrobium soli HAPH15, and Pseudomonas kilonensis HAPH16 demonstrated high plant growth-promoting activity of cucumber in four soil salinity levels (0, 25, 50, and 100 mM) after seeds' inoculation. These bacterial endophytes were able to fix nitrogen, solubilize phosphates, and produce indole-3-acetic acid, 1-aminocyclopropane-1-carboxylate deaminase, and siderophores which are considered as the main plant growth-promoting traits. After field experiments, the best plant growth-promoters can be used as bioinoculants for plants' growth improvement in salinity conditions.
Halocnemum strobilaceum (Pall.) M.Bieb. is a halophyte desert plant. The plant is known for its antioxidant, antimicrobial, insecticidal and phytoremediation properties. Halocnemum strobilaceum grows in severe salinity and drought conditions and its’ survival can be associated with activity of endophytic bacteria. The aim of the research was to reveal and study plant growth-promoting endophytic bacteria isolated from Halocnemum strobilaceum (Pall.) M.Bieb. The plants were collected from Kyzylkum desert in Uzbekistan. The endophytic bacteria were isolated from Halocnemum strobilaceum (Pall.) M.Bieb. tissues and screened for cotton (Gossypium hirsutum L.) growth-promoting activity. As a result the most active isolates HAST-2, HAST-7, HAST-9, HAST-10 and HAST-17 were selected. The cotton seeds’ inoculation with these bacterial isolates resulted in significant improvement of seeds germination, root and shoot length, and fresh plant weight due to their ability to fix nitrogen, produce indole-3-acetic acid (IAA), 1-aminocyclopropane-1-carboxylate (ACC) deaminase, siderophores and solubilize phosphates. The chosen isolates were identified using 16S rRNA gene analysis and registered in GenBank (NCBI) as Bacillus megaterium HAST-2, Bacillus aryabhattai HAST-7, Pseudomonas plecoglossicida HAST-9, Pseudomonas putida HAST-10 and Pseudomonas chlororaphis HAST-17. These strains can be used as bio-inoculants to improve the growth of cotton and other crops.
Halocnemum strobilaceum (Pall.) M. Bieb. is a halophytic desert plant. This plant population is widespread in areas of high salinity of the world, including a Dry Salt Lake of the Central Kyzylkum. Analyzing the environment of the plant root system and the inorganic and organic composition of the soil of dried salt marshes using modern methods is of great importance in explaining the mechanisms of rapid growth and development of H. strobilaceum in areas affected by the stress factor. In the researches, with the help of IR spectroscopic and agrochemical methods, the amount of inorganic salts and organic substances in the soil around the root system of the H. strobilaceum plant was shown to be closer to the standard indicators than the amount of these substances in the soil of dry saline areas. The obtained results serve to explain the importance of H. strobilaceum and similar dominant species in the formation of plant populations in arid and saline areas.
This article describes the results of experiments aimed at isolation and identification of endophytic bacteria from the Ceratoides ewersmanniana plant, common in arid regions of Uzbekistan, determining the effect of isolated isolates on the fertility of wheat seeds, and selecting promising strains recommended for practical use. These data are preliminary results of research on the endophytic bacteria of C.ewersmanniana, which are of scientific and practical importance.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.