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Bacterial Cr(VI) Reduction Concurrently Improves Sunflower (Helianthus Annuus L.) Growth

Four Cr(VI)-reducing bacterial strains (Ochrobactrum intermedium, CrT-2, CrT-3 and CrT-4) previously isolated from chromium-contaminated sites were inoculated on to seeds of sunflower (Helianthus annuus var SF-187), which were germinated and grown along with non-inoculated controls with chromate salts (300 μg CrCl₃ or K₂CrO₄ ml⁻¹). Severe reduction (20%) in seed germination was observed in Cr(VI) stress. Plant height decreased (36%) with Cr(VI) when compared with chromium-free control, while O. intermedium inoculation resulted a 20% increment in this parameter as compared to non-inoculated chromium-free control. CrT-3 inoculation resulted a 69% increment in auxin content as compared to non-inoculated control. O. intermedium caused 30% decrease in chromium uptake in sunflower plant roots under Cr(VI) stress as compared to chromium-free control plants.

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1. Department of Botany, University of the Punjab, Quaid-e-Azam Campus, 54590, Lahore, Pakistan

   Muhammad Faisal & Shahida Hasnain

1. Muhammad Faisal
2. Shahida Hasnain

Correspondence to Shahida Hasnain.

Faisal, M., Hasnain, S. Bacterial Cr(VI) Reduction Concurrently Improves Sunflower (Helianthus Annuus L.) Growth. Biotechnol Lett 27, 943–947 (2005). https://doi.org/10.1007/s10529-005-7188-2

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• Received: 28 January 2005

• Revised: 05 May 2005

• Accepted: 05 May 2005

• Issue Date: July 2005

• DOI: https://doi.org/10.1007/s10529-005-7188-2

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