Plant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean
Al-Solaimani, Samir G.
Madkour, Mohamed H.
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Plant Science Program
Desert Agriculture Initiative
MetadataShow full item record
AbstractThe present study explored the eco-friendly approach of utilizing plant-growth-promoting rhizobacteria (PGPR) inoculation and foliar application of silicon (Si) to improve the physiology, growth, and yield of mung bean under saline conditions. We isolated 18 promising PGPR from natural saline soil in Saudi Arabia, and screened them for plant-growth-promoting activities. Two effective strains were selected from the screening trial, and were identified as Enterobacter cloacae and Bacillus drentensis using matrix-assisted laser desorption ionization-time-of-flight mass spectrometry and 16S rRNA gene sequencing techniques, respectively. Subsequently, in a 2-year mung bean field trial, using a randomized complete block design with a split-split plot arrangement, we evaluated the two PGPR strains and two Si levels (1 and 2 kg ha−1), in comparison with control treatments, under three different saline irrigation conditions (3.12, 5.46, and 7.81 dS m−1). The results indicated that salt stress substantially reduced stomatal conductance, transpiration rate, relative water content (RWC), total chlorophyll content, chlorophyll a, chlorophyll b, carotenoid content, plant height, leaf area, dry biomass, seed yield, and salt tolerance index. The PGPR strains and Si levels independently improved all the aforementioned parameters. Furthermore, the combined application of the B. drentensis strain with 2 kg Si ha−1 resulted in the greatest enhancement of mung bean physiology, growth, and yield. Overall, the results of this study provide important information for the benefit of the agricultural industry.
CitationPlant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean 2016, 7 Frontiers in Plant Science
SponsorsThis article was funded by the Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah. The author, therefore, acknowledge with thanks DSR technical and financial support.
PublisherFrontiers Media SA
JournalFrontiers in Plant Science
- Efficacy of Rhizobium and Pseudomonas strains to improve physiology, ionic balance and quality of mung bean under salt-affected conditions on farmer's fields.
- Authors: Ahmad M, Zahir ZA, Khalid M, Nazli F, Arshad M
- Issue date: 2013 Feb
- Inducing salt tolerance in mung bean through coinoculation with rhizobia and plant-growth-promoting rhizobacteria containing 1-aminocyclopropane-1-carboxylate deaminase.
- Authors: Ahmad M, Zahir ZA, Asghar HN, Asghar M
- Issue date: 2011 Jul
- Imperative roles of halotolerant plant growth-promoting rhizobacteria and kinetin in improving salt tolerance and growth of black gram (Phaseolus mungo).
- Authors: Yasin NA, Khan WU, Ahmad SR, Ali A, Ahmad A, Akram W
- Issue date: 2018 Feb
- Boosting Alfalfa (<i>Medicago sativa</i> L.) Production With Rhizobacteria From Various Plants in Saudi Arabia.
- Authors: Daur I, Saad MM, Eida AA, Ahmad S, Shah ZH, Ihsan MZ, Muhammad Y, Sohrab SS, Hirt H
- Issue date: 2018
- Plant Growth-Promoting Rhizobacteria Inoculation to Enhance Vegetative Growth, Nitrogen Fixation and Nitrogen Remobilisation of Maize under Greenhouse Conditions.
- Authors: Kuan KB, Othman R, Abdul Rahim K, Shamsuddin ZH
- Issue date: 2016