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1- Department of Soil Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2- Department of Soil Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran ,emalekzadeh@gau.ac.ir
2- Department of Soil Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran ,
Abstract: (109 Views)
This study aimed to evaluate the capability of the halophyte A. littoralis in symbiosis with Rhizophagus intraradices and Nocardia Halotolerans an indigenous bacterium of saline soils- on phytoextraction of Na under saline conditions. Salinity treatments included 0 (S0), 100 mM NaCl (S1), 200 mM NaCl (S2), 100 mM NaCl+50mM K2SO4 (S3), 200 mM NaCl+50mM K2SO4 (S4) levels. Plant fresh and dry weight, chlorophyll content decreased as salinity increased up to S2 level and increased thereafter. Plant root colonization in the inoculation and co-inoculation of AMF+SR-PGPB were similar. Compared to the S0 treatment, root colonization in the AMF group decreased by 23.5%, 32.6%, 13.5%, and 26.7% under S1, S2, S3, and S4 treatments, respectively. In the Bacteria+AMF group, the reduction was smaller, with decreases of 2.8%, 3.4%, and an increase of 6.8% and 1.4% under S1, S2, S3, and S4 treatments, respectively. These results indicate that co-inoculation with PGPB mitigated the negative effects of salinity on root colonization. The root and soil glomalin contents increased as salinity increased. Root glomalin in plants inoculated by AMF+SR-PGPB was more than in a single inoculation of AMF under salt stress. This study highlights the potential application of salt-tolerant bacteria and AMF as effective strategies for enhancing plant growth and productivity in saline environments, contributing to sustainable agricultural practices in affected regions.
Keywords: Halophyte, mycorrhizal symbiosis, plant growth promoting traits, phytoremediation, salinity stress.
Article Type: Original Research |
Subject:
Soil Chemistry, Fertility, Plant nutrition
Received: 2024/08/11 | Accepted: 2024/01/11
Received: 2024/08/11 | Accepted: 2024/01/11
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