Plant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean
Type
ArticleAuthors
Mahmood, SajidDaur, Ihsanullah
Al-Solaimani, Samir G.
Ahmad, Shakeel
Madkour, Mohamed H.
Yasir, Muhammad
Hirt, Heribert

Ali, Shawkat

Ali, Zahir

KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionDesert Agriculture Initiative
Plant Science
Plant Science Program
Date
2016-06-17Permanent link to this record
http://hdl.handle.net/10754/614898
Metadata
Show full item recordAbstract
The 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.Citation
Plant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean 2016, 7 Frontiers in Plant ScienceSponsors
This 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.Publisher
Frontiers Media SAJournal
Frontiers in Plant SciencePubMed ID
27379151Additional Links
http://journal.frontiersin.org/article/10.3389/fpls.2016.00876ae974a485f413a2113503eed53cd6c53
10.3389/fpls.2016.00876
Scopus Count
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