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Assessment of the capacity of beneficial bacterial inoculants to enhance canola (Brassica napus L.) growth under low water activity
journal contribution
posted on 2020-09-01, 00:00 authored by Dasun Premachandra, Lee Hudek, Aydin EnezAydin Enez, Ross Ballard, Steve Barnett, Christopher M M Franco, Lambert BrauLambert BrauCanola (Brassica napus L.) is the third largest crop produced in Australia after wheat and barley. For such crops, the variability of water access, reduced long-term annual rainfall and increasing water prices, higher overall production costs, and variability in production quantity and quality are driving the exploration of new tools to maintain production in an economical and environmentally sustainable way. Microorganisms associated with the rhizosphere have been shown to enhance plant growth and offer a potential way to maintain or even increase crop production quality and yield in an environmentally sustainable way. Here, seven bacterial isolates from canola rhizosphere samples are shown to enhance canola growth, particularly in low water activity systems. The seven strains all possessed commonly described plant growth promoting traits, including the ability to produce indole-3-acetic acid and 1-aminocyclopropane-1-carboxylate deaminase, and the capacity to solubilise nutrients (Fe2+/3+ and PO43−). When the isolates were inoculated at the time of sowing in pot-based systems with either sand or clay loam media, and in field trials, a significant increase in dry root and shoot biomass was recorded compared to uninoculated controls. It is likely that the strains’ plant growth promoting capacity under water stress is due to the combined effects of the bacterial phenotypes examined here.
History
Journal
AgronomyVolume
10Issue
9Article number
1449Pagination
1 - 25Publisher
MDPI AGLocation
Basel, SwitzerlandPublisher DOI
Link to full text
eISSN
2073-4395Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalUsage metrics
Categories
No categories selectedKeywords
Brassica napusL. (canola)PGPBwater activityplant growth promoting traitssustainable agricultureScience & TechnologyLife Sciences & BiomedicineAgronomyPlant SciencesAgricultureBrassica napus L. (canola)PLANT-GROWTHPROMOTING RHIZOBACTERIAARABIDOPSIS-THALIANAPSEUDOMONAS-FLUORESCENSACC DEAMINASEDROUGHTRHIZOSPHERESOILSTRESSSIDEROPHORES