Plant Growth-Promoting Rhizobacteria (PGPR) with Microbial Growth Broth Improve Biomass and Secondary Metabolite Accumulation of <i>Cannabis sativa</i> L.

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Abstract

Plant growth-promoting rhizobacteria (PGPR) are a sustainable crop production input; some show positive effects under laboratory conditions but poorly colonize host field-grown plants. Inoculating with PGPR in microbial growth medium ( e.g., King’s B) could overcome this. We evaluated cannabis plant (cv. CBD Kush) growth promotion by inoculating three PGPR ( Bacillus sp., Mucilaginibacter sp., and Pseudomonas sp.) in King’s B at vegetative and flower stages. At the vegetative stage, Mucilaginibacter sp. inoculation increased flower dry weight (24%), total CBD (11.1%), and THC (11.6%); Pseudomonas sp. increased stem (28%) dry matter, total CBD (7.2%), and THC (5.9%); and Bacillus sp. increased total THC by 4.8%. Inoculation with Mucilaginibacter sp. and Pseudomonas sp. at the flowering stage led to 23 and 18% increases in total terpene accumulation, respectively. Overall, vegetative inoculation with PGPR enhanced cannabis yield attributes and chemical profiles. Further research into PGPR inoculation onto cannabis and the subsequent level of colonization could provide key insights regarding PGPR-host interactions.

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Plant growth-promoting rhizobacteria and root system functioning

Jordan Vacheron, Guilhem Desbrosses, Marie-Lara Bouffaud … (2013)

The rhizosphere supports the development and activity of a huge and diversified microbial community, including microorganisms capable to promote plant growth. Among the latter, plant growth-promoting rhizobacteria (PGPR) colonize roots of monocots and dicots, and enhance plant growth by direct and indirect mechanisms. Modification of root system architecture by PGPR implicates the production of phytohormones and other signals that lead, mostly, to enhanced lateral root branching and development of root hairs. PGPR also modify root functioning, improve plant nutrition and influence the physiology of the whole plant. Recent results provided first clues as to how PGPR signals could trigger these plant responses. Whether local and/or systemic, the plant molecular pathways involved remain often unknown. From an ecological point of view, it emerged that PGPR form coherent functional groups, whose rhizosphere ecology is influenced by a myriad of abiotic and biotic factors in natural and agricultural soils, and these factors can in turn modulate PGPR effects on roots. In this paper, we address novel knowledge and gaps on PGPR modes of action and signals, and highlight recent progress on the links between plant morphological and physiological effects induced by PGPR. We also show the importance of taking into account the size, diversity, and gene expression patterns of PGPR assemblages in the rhizosphere to better understand their impact on plant growth and functioning. Integrating mechanistic and ecological knowledge on PGPR populations in soil will be a prerequisite to develop novel management strategies for sustainable agriculture.

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Cannabis sativa: The Plant of the Thousand and One Molecules

Christelle Andre, Jean-Francois Hausman, Gea Guerriero (2016)

Cannabis sativa L. is an important herbaceous species originating from Central Asia, which has been used in folk medicine and as a source of textile fiber since the dawn of times. This fast-growing plant has recently seen a resurgence of interest because of its multi-purpose applications: it is indeed a treasure trove of phytochemicals and a rich source of both cellulosic and woody fibers. Equally highly interested in this plant are the pharmaceutical and construction sectors, since its metabolites show potent bioactivities on human health and its outer and inner stem tissues can be used to make bioplastics and concrete-like material, respectively. In this review, the rich spectrum of hemp phytochemicals is discussed by putting a special emphasis on molecules of industrial interest, including cannabinoids, terpenes and phenolic compounds, and their biosynthetic routes. Cannabinoids represent the most studied group of compounds, mainly due to their wide range of pharmaceutical effects in humans, including psychotropic activities. The therapeutic and commercial interests of some terpenes and phenolic compounds, and in particular stilbenoids and lignans, are also highlighted in view of the most recent literature data. Biotechnological avenues to enhance the production and bioactivity of hemp secondary metabolites are proposed by discussing the power of plant genetic engineering and tissue culture. In particular two systems are reviewed, i.e., cell suspension and hairy root cultures. Additionally, an entire section is devoted to hemp trichomes, in the light of their importance as phytochemical factories. Ultimately, prospects on the benefits linked to the use of the -omics technologies, such as metabolomics and transcriptomics to speed up the identification and the large-scale production of lead agents from bioengineered Cannabis cell culture, are presented.

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Enhanced plant growth by siderophores produced by plant growth-promoting rhizobacteria

Joseph Kloepper, John Leong, Martin Teintze … (1980)

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Author and article information

Journal

Journal ID (nlm-ta): J Agric Food Chem

Journal ID (iso-abbrev): J Agric Food Chem

Journal ID (publisher-id): jf

Journal ID (coden): jafcau

Title: Journal of Agricultural and Food Chemistry

Publisher: American Chemical Society

ISSN (Print): 0021-8561

ISSN (Electronic): 1520-5118

Publication date (Electronic): 02 May 2023

Publication date Collection: 17 May 2023

Volume: 71

Issue: 19

Pages: 7268-7277

Affiliations

[† ]Department of Plant Science, McGill University , Sainte-Anne-de-Bellevue H9X3V9, Quebec, Canada

[‡ ]National Research Council Canada , Halifax B3H 3Z1, Nova Scotia, Canada

Author notes

[* ]Email: donald.smith@ 123456mcgill.ca .

Author information

Dongmei Lyu https://orcid.org/0000-0001-9067-1737

Rachel Backer https://orcid.org/0000-0002-5631-9833

Fabrice Berrué https://orcid.org/0000-0003-2389-4388

Article

DOI: 10.1021/acs.jafc.2c06961

PMC ID: 10197126

PubMed ID: 37130078

SO-VID: 426b56fa-ef58-4aa7-a40f-ac2999097a75

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Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works ( https://creativecommons.org/licenses/by-nc-nd/4.0/).

History

Date received : 07 October 2022

Date accepted : 25 January 2023

Date revision received : 24 January 2023

Funding

Funded by: Government of Canada, doi 10.13039/501100000038;

Award ID: 517552-17

Funded by: Ravenquest Biomed, doi NA;

Award ID: NA

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document-id-old-9 jf2c06961

document-id-new-14 jf2c06961

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ScienceOpen disciplines: Food science & Technology

Keywords: cannabis sativa l.,microbial growth medium,plant growth-promoting rhizobacteria,flower yield,cannabinoid,terpene

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ScienceOpen disciplines: Food science & Technology

Keywords: cannabis sativa l., microbial growth medium, plant growth-promoting rhizobacteria, flower yield, cannabinoid, terpene

Plant Growth-Promoting Rhizobacteria (PGPR) with Microbial Growth Broth Improve Biomass and Secondary Metabolite Accumulation of Cannabis sativa L.

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Irish Journal of Agricultural and Food Research

Most cited references 59

Plant growth-promoting rhizobacteria and root system functioning

Cannabis sativa: The Plant of the Thousand and One Molecules

Enhanced plant growth by siderophores produced by plant growth-promoting rhizobacteria

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