Plant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean

Handle URI:
http://hdl.handle.net/10754/614898
Title:
Plant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean
Authors:
Mahmood, Sajid; Daur, Ihsanullah; Al-Solaimani, Samir G.; Ahmad, Shakeel; Madkour, Mohamed H.; Yasir, Muhammad; Hirt, Heribert ( 0000-0003-3119-9633 ) ; Ali, Shawkat ( 0000-0003-3282-3186 ) ; Ali, Zahir ( 0000-0002-7814-8908 )
Abstract:
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.
KAUST Department:
Center for Desert Agriculture
Citation:
Plant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean 2016, 7 Frontiers in Plant Science
Publisher:
Frontiers Media SA
Journal:
Frontiers in Plant Science
Issue Date:
17-Jun-2016
DOI:
10.3389/fpls.2016.00876
Type:
Article
ISSN:
1664-462X
Sponsors:
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.
Additional Links:
http://journal.frontiersin.org/article/10.3389/fpls.2016.00876
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorMahmood, Sajiden
dc.contributor.authorDaur, Ihsanullahen
dc.contributor.authorAl-Solaimani, Samir G.en
dc.contributor.authorAhmad, Shakeelen
dc.contributor.authorMadkour, Mohamed H.en
dc.contributor.authorYasir, Muhammaden
dc.contributor.authorHirt, Heriberten
dc.contributor.authorAli, Shawkaten
dc.contributor.authorAli, Zahiren
dc.date.accessioned2016-06-28T11:21:52Z-
dc.date.available2016-06-28T11:21:52Z-
dc.date.issued2016-06-17-
dc.identifier.citationPlant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Bean 2016, 7 Frontiers in Plant Scienceen
dc.identifier.issn1664-462X-
dc.identifier.doi10.3389/fpls.2016.00876-
dc.identifier.urihttp://hdl.handle.net/10754/614898-
dc.description.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.en
dc.description.sponsorshipThis 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.en
dc.language.isoenen
dc.publisherFrontiers Media SAen
dc.relation.urlhttp://journal.frontiersin.org/article/10.3389/fpls.2016.00876en
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. http://creativecommons.org/licenses/by/4.0/en
dc.subjectwater relationen
dc.subjectstomatal conductanceen
dc.subjectphotosynthetic pigmentsen
dc.subjectsalt tolerance indexen
dc.subjectrhizobacteria characterization-identificationen
dc.titlePlant Growth Promoting Rhizobacteria and Silicon Synergistically Enhance Salinity Tolerance of Mung Beanen
dc.typeArticleen
dc.contributor.departmentCenter for Desert Agricultureen
dc.identifier.journalFrontiers in Plant Scienceen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabiaen
dc.contributor.institutionDepartment of Environmental Sciences, King Abdulaziz University, Jeddah, Saudi Arabiaen
dc.contributor.institutionKing Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorHirt, Heriberten
kaust.authorAli, Shawkaten
kaust.authorAli, Zahiren
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