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Hassan Chaudhary
Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan

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Journal article
Published: 19 July 2021 in Sustainability
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Plant growth-promoting rhizobacteria play a substantial role in plant growth and development under biotic and abiotic stress conditions. However, understanding about the functional role of rhizobacterial strains for wheat growth under salt stress remains largely unknown. Here we investigated the antagonistic bacterial strain Bacillus aryabhattai PM34 inhabiting ACC deaminase and exopolysaccharide producing ability to ameliorate salinity stress in wheat seedlings under in vitro conditions. The strain PM34 was isolated from the potato rhizosphere and screened for different PGP traits comprising nitrogen fixation, potassium, zinc solubilization, indole acetic acid, siderophore, and ammonia production, along with various extracellular enzyme activities. The strain PM34 showed significant tolerance towards both abiotic stresses including salt stress (NaCl 2 M), heavy metal (nickel, 100 ppm, and cadmium, 300 ppm), heat stress (60 °C), and biotic stress through mycelial inhibition of Rhizoctonia solani (43%) and Fusarium solani (41%). The PCR detection of ituC, nifH, and acds genes coding for iturin, nitrogenase, and ACC deaminase enzyme indicated the potential of strain PM34 for plant growth promotion and stress tolerance. In the in vitro experiment, NaCl (2 M) decreased the wheat growth while the inoculation of strain PM34 enhanced the germination% (48%), root length (76%), shoot length (75%), fresh biomass (79%), and dry biomass (87%) over to un-inoculated control under 2M NaCl level. The results of experiments depicted the ability of antagonistic bacterial strain Bacillus aryabhattai PM34 to augment salt stress tolerance when inoculated to wheat plants under saline environment.

ACS Style

Shehzad Mehmood; Amir Khan; Fuchen Shi; Muhammad Tahir; Tariq Sultan; Muhammad Munis; Prashant Kaushik; Mohammed Alyemeni; Hassan Chaudhary. Alleviation of Salt Stress in Wheat Seedlings via Multifunctional Bacillus aryabhattai PM34: An In-Vitro Study. Sustainability 2021, 13, 8030 .

AMA Style

Shehzad Mehmood, Amir Khan, Fuchen Shi, Muhammad Tahir, Tariq Sultan, Muhammad Munis, Prashant Kaushik, Mohammed Alyemeni, Hassan Chaudhary. Alleviation of Salt Stress in Wheat Seedlings via Multifunctional Bacillus aryabhattai PM34: An In-Vitro Study. Sustainability. 2021; 13 (14):8030.

Chicago/Turabian Style

Shehzad Mehmood; Amir Khan; Fuchen Shi; Muhammad Tahir; Tariq Sultan; Muhammad Munis; Prashant Kaushik; Mohammed Alyemeni; Hassan Chaudhary. 2021. "Alleviation of Salt Stress in Wheat Seedlings via Multifunctional Bacillus aryabhattai PM34: An In-Vitro Study." Sustainability 13, no. 14: 8030.

Articles
Published: 24 June 2020 in International Journal of Phytoremediation
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In developing countries, Cd contamination is ubiquitous which limits agriculture productivity. The current study was designed to investigate the efficacy of plant—Bacillus pumilus—ethylene diamine tetraacetic acid (EDTA) and plant-microbe-chelator (PMC) synergy for enhanced plant growth and Cd-uptake potential of Zea mays in industrially contaminated and cadmium (Cd) spiked soil. A pot experiment was conducted by growing Z. mays seedlings either inoculated with B. pumilus or un-inoculated along with the application of 5 mM EDTA. Plants were exposed to two levels of Cd contamination for 45 days. An increase in Cd uptake was observed in Z. mays inoculated with B. pumilus followed by EDTA treatment as compared to non-inoculated and un-treated ones. Zea mays showed improved values with PMC approach for different growth parameters including root length (41%), shoot length (40%), fresh weight (59%), dry weight (49%), chlorophyll contents (49%), and relative water contents (30%). Higher tolerance index (117%) was observed for plants grown in soil spiked with 300 mg kg−1 Cd (S2). PMC application markedly enhanced Cd uptake potential of Z. mays up to 12% and 68.8%, respectively, in S1 and S2 soil. While the PMC application increased Cd accumulation capacity of Z. mays by 71.2% and 52.5% in S1 and S2 soil. The calculated bioaccumulation and translocation factor revealed that Z. mays possess Cd uptake potential, and this ability can be significantly enhanced with PMC application.

ACS Style

Kashif Hayat; Saiqa Menhas; Jochen Bundschuh; Pei Zhou; Nabeel Khan Niazi; Amna; Amjad Hussain; Sikandar Hayat; Hazrat Ali; Juncai Wang; Amir Abdullah Khan; Amjad Ali; Farooq Hussain Munis; Hassan Javed Chaudhary. Plant growth promotion and enhanced uptake of Cd by combinatorial application of Bacillus pumilus and EDTA on Zea mays L. International Journal of Phytoremediation 2020, 22, 1372 -1384.

AMA Style

Kashif Hayat, Saiqa Menhas, Jochen Bundschuh, Pei Zhou, Nabeel Khan Niazi, Amna, Amjad Hussain, Sikandar Hayat, Hazrat Ali, Juncai Wang, Amir Abdullah Khan, Amjad Ali, Farooq Hussain Munis, Hassan Javed Chaudhary. Plant growth promotion and enhanced uptake of Cd by combinatorial application of Bacillus pumilus and EDTA on Zea mays L. International Journal of Phytoremediation. 2020; 22 (13):1372-1384.

Chicago/Turabian Style

Kashif Hayat; Saiqa Menhas; Jochen Bundschuh; Pei Zhou; Nabeel Khan Niazi; Amna; Amjad Hussain; Sikandar Hayat; Hazrat Ali; Juncai Wang; Amir Abdullah Khan; Amjad Ali; Farooq Hussain Munis; Hassan Javed Chaudhary. 2020. "Plant growth promotion and enhanced uptake of Cd by combinatorial application of Bacillus pumilus and EDTA on Zea mays L." International Journal of Phytoremediation 22, no. 13: 1372-1384.

Original articles
Published: 12 March 2015 in International Journal of Phytoremediation
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Plants show enhanced phytoremediation of heavy metal contaminated soils particularly in response to fungal inoculation. Present study was conducted to find out the influence of Nickel (Ni) toxicity on plant biomass, growth, chlorophyll content, proline production and metal accumulation by L. usitatissimum (flax) in the presence of Glomus intraradices. Flax seedlings of both inoculated with G. intraradices and non-inoculated were exposed to different concentrations i.e., 250, 350 and 500 ppm of Ni at different time intervals. Analysis of physiological parameters revealed that Ni depressed the growth and photosynthetic activity of plants. However, the inoculation of plants with arbuscular mycorrhizae (G. intraradices) partially helped in the alleviation of Ni toxicity as indicated by improved plant growth under Ni stress. Ni uptake of non- mycorrhizal flax plants was increased by 98% as compared to control conditions whereas inoculated plants showed 19% more uptake when compared with the non-inoculated plants. Mycorrhizal plants exhibited increasing capacity to remediate contaminated soils along with improved growth. Thus, AM assisted phytoremediation helps in the accumulation of Ni in plants to reclaim Ni toxic soils. Based on our findings, it can be concluded that the role of flax plants and mycorrhizal fungi is extremely important in phytoremediation.

ACS Style

Amna; Sajid Masood; Jabir Hussain Syed; Muhammad Farooq Hussain Munis; Hassan Javed Chaudhary. Phyto-Extraction of Nickel byLinum usitatissimumin Association withGlomus intraradices. International Journal of Phytoremediation 2015, 17, 981 -987.

AMA Style

Amna, Sajid Masood, Jabir Hussain Syed, Muhammad Farooq Hussain Munis, Hassan Javed Chaudhary. Phyto-Extraction of Nickel byLinum usitatissimumin Association withGlomus intraradices. International Journal of Phytoremediation. 2015; 17 (10):981-987.

Chicago/Turabian Style

Amna; Sajid Masood; Jabir Hussain Syed; Muhammad Farooq Hussain Munis; Hassan Javed Chaudhary. 2015. "Phyto-Extraction of Nickel byLinum usitatissimumin Association withGlomus intraradices." International Journal of Phytoremediation 17, no. 10: 981-987.