Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agriculture
The growing human population and abiotic stresses pose significant threats to food security, with PGPR favorable as biofertilizers for plant growth and stress relief. In one study, soil samples from both cultivated and uncultivated plants in various cities were used to isolate rhizobacterial populat...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-12-01
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| Series: | Plant Signaling & Behavior |
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| Online Access: | http://dx.doi.org/10.1080/15592324.2025.2452331 |
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| author | Malika Uzma Atif Nisar Atia Iqbal Shahida Hasnain Mohamed H. Mahmoud Muhammad Abdul Rahim Tehseen Gull Roberto Castro-Muñoz Eliasse Zongo |
| author_facet | Malika Uzma Atif Nisar Atia Iqbal Shahida Hasnain Mohamed H. Mahmoud Muhammad Abdul Rahim Tehseen Gull Roberto Castro-Muñoz Eliasse Zongo |
| author_sort | Malika Uzma |
| collection | DOAJ |
| description | The growing human population and abiotic stresses pose significant threats to food security, with PGPR favorable as biofertilizers for plant growth and stress relief. In one study, soil samples from both cultivated and uncultivated plants in various cities were used to isolate rhizobacterial populations. Using 50 soil samples from both cultivated and uncultivated plants, isolated rhizobacterial populations were screened for various biochemical changes, PGP activities and morphological characteristics. A total of 199 rhizobacteria were isolated and screened for IAA production. The strain M28 produced maximum IAA 378.44 ± 2.5 µg ml−1, M9 formed only 34.72 ± 0.15 µg ml−1. About 19% of IAA producers were isolated from Multan, 18% Lahore, 15% from soils of Faisalabad and Sheikhupura, while 7% from Gujrat. The 21 isolates were drought tolerant to −0.14Mpa, 14 of those were PSB and 15 were N fixers. In PGP traits, maximum zinc solubility was expressed by M4 as 2 ± 0.5 cm of zone. The strain M22 produced amount of HCN, 40.12 ± 0.052 ppm. All isolates showed diverse behavior in biocompatibility, motility patterns and hydrophobicity. Selected drought tolerant strains were genetically identified by ribotyping. Multitrait PGPR could be effective biofertilizers rather than with single trait. The strain M28 having highest production of IAA, was gelatinase, methyl red positive and was also capable of nitrogen fixation. Moreover, it had maximum swimming (8.9 mm) and swarming (8.7 mm) activities after 24 h, indicating its best PGP traits for future use. |
| format | Article |
| id | doaj-art-2cba9a20335b4feaae25537bc658636b |
| institution | Kabale University |
| issn | 1559-2316 1559-2324 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Signaling & Behavior |
| spelling | doaj-art-2cba9a20335b4feaae25537bc658636b2025-01-20T14:37:59ZengTaylor & Francis GroupPlant Signaling & Behavior1559-23161559-23242025-12-0120110.1080/15592324.2025.24523312452331Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agricultureMalika Uzma0Atif Nisar1Atia Iqbal2Shahida Hasnain3Mohamed H. Mahmoud4Muhammad Abdul Rahim5Tehseen Gull6Roberto Castro-Muñoz7Eliasse Zongo8Times InstituteBahauddin Zakariya UniversityMatital campus, The Women University MultanUniversity of the PunjabKing Saud UniversityTimes InstituteTimes InstituteGdansk University of TechnologyLaboratory of Research and Teaching in Animal Health and BiotechnologyThe growing human population and abiotic stresses pose significant threats to food security, with PGPR favorable as biofertilizers for plant growth and stress relief. In one study, soil samples from both cultivated and uncultivated plants in various cities were used to isolate rhizobacterial populations. Using 50 soil samples from both cultivated and uncultivated plants, isolated rhizobacterial populations were screened for various biochemical changes, PGP activities and morphological characteristics. A total of 199 rhizobacteria were isolated and screened for IAA production. The strain M28 produced maximum IAA 378.44 ± 2.5 µg ml−1, M9 formed only 34.72 ± 0.15 µg ml−1. About 19% of IAA producers were isolated from Multan, 18% Lahore, 15% from soils of Faisalabad and Sheikhupura, while 7% from Gujrat. The 21 isolates were drought tolerant to −0.14Mpa, 14 of those were PSB and 15 were N fixers. In PGP traits, maximum zinc solubility was expressed by M4 as 2 ± 0.5 cm of zone. The strain M22 produced amount of HCN, 40.12 ± 0.052 ppm. All isolates showed diverse behavior in biocompatibility, motility patterns and hydrophobicity. Selected drought tolerant strains were genetically identified by ribotyping. Multitrait PGPR could be effective biofertilizers rather than with single trait. The strain M28 having highest production of IAA, was gelatinase, methyl red positive and was also capable of nitrogen fixation. Moreover, it had maximum swimming (8.9 mm) and swarming (8.7 mm) activities after 24 h, indicating its best PGP traits for future use.http://dx.doi.org/10.1080/15592324.2025.2452331isolationcharacterizationzinc solubilitymotilityhydrophobicitybiofilm |
| spellingShingle | Malika Uzma Atif Nisar Atia Iqbal Shahida Hasnain Mohamed H. Mahmoud Muhammad Abdul Rahim Tehseen Gull Roberto Castro-Muñoz Eliasse Zongo Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agriculture Plant Signaling & Behavior isolation characterization zinc solubility motility hydrophobicity biofilm |
| title | Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agriculture |
| title_full | Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agriculture |
| title_fullStr | Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agriculture |
| title_full_unstemmed | Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agriculture |
| title_short | Exploring the efficacy of drought tolerant, IAA-producing plant growth-promoting rhizobacteria for sustainable agriculture |
| title_sort | exploring the efficacy of drought tolerant iaa producing plant growth promoting rhizobacteria for sustainable agriculture |
| topic | isolation characterization zinc solubility motility hydrophobicity biofilm |
| url | http://dx.doi.org/10.1080/15592324.2025.2452331 |
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