Mitigation of Heat Stress in Solanum lycopersicum L. by ACC-deaminase and Exopolysaccharide Producing Bacillus cereus: Effects on Biochemical Profiling

Tehmeena Mukhtar, Shafiq ur Rehman, Donald Smith, Tariq Sultan, Mahmoud F. Seleiman, Abdullah A. Alsadon, Amna, Shafaqat Ali, Hassan Javed Chaudhary, Talaat H. I. Solieman, Abdullah A. Ibrahim and Montasir A. O. Saad
Additional contact information
Tehmeena Mukhtar: Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
Shafiq ur Rehman: Department of Botany, University of Okara, Okara 53900, Pakistan
Donald Smith: Plant Science Department, McGill University, 21,111 Lakeshore Road, Ste. Anne de Bellevue, QC H9X 3V9, Canada
Tariq Sultan: Land Resource Research Institute, NARC, Islamabad 44000, Pakistan
Mahmoud F. Seleiman: Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Abdullah A. Alsadon: Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Amna: Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
Shafaqat Ali: Department of Environmental Science and Engineering, Government College University, Faisalabad 38000, Pakistan
Hassan Javed Chaudhary: Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
Talaat H. I. Solieman: Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Abdullah A. Ibrahim: Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Montasir A. O. Saad: Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia

Sustainability, 2020, vol. 12, issue 6, 1-20

Abstract: Soil microorganisms might be assessed for their capabilities of plant growth promotion in order to identify heat tolerant strategies for crop production. The planned study was conducted to determine the potential of heat tolerant plant growth promoting rhizobacteria (PGPR) in mitigating heat stress effects in tomato. Bacillus cereus was evaluated for plant growth promoting activities and assessed for 1-aminocyclopropane-1-carboxylate (ACC-deaminase) (0.76–C0.9 μM/mg protein/h), and exopolysaccharide (0.66–C0.91 mg/mL) under normal and heat stressed conditions. Plant growth regulators were evaluated through High Performance Liquid Chromatography. Bacterial inoculation effects on important physiological and biochemical parameters were evaluated under normal and heat stressed conditions in growth chamber. The morphological-physiological traits significantly revealed drastic effects on both of un-inoculated tomato varieties under heat stress conditions. Bacterial augmentation significantly promoted shoot, root length, leaf surface area, fresh and dry weight. Heat stress enhanced extracellular polymeric substances (EPS) production and cleavage of ACC into a-ketobutyrate and ammonia due to ACC-deaminase producing bacteria that significantly reduced the adverse effects of heat on tomato growth. In conclusion, the applied plant growth promoting rhizobacteria (PGPR) bacterial strain proved as potential candidate for improving tomato crop growing under heat stressed conditions. However, it is highly suggested to validate the current results by conducting field trials.

Keywords: ACC-deaminase; heat tolerance; rhizobacteria; PGPR; plant growth regulators; tomato (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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