Influence of plant growth-promoting rhizobacteria (PGPR) on blackberry (Rubus glaucus Benth. cv. thornless) growth under semi-cover and field conditions

Robledo-Buriticá, Jacobo; Aristizábal-Loaiza, J. C.; Ceballos-Aguirre, Nelson; Cabra-Cendales, Teresa

doi:10.15446/acag.v67n2.62572

Cited by 10 publications

(11 citation statements)

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“…IAA is involved in cell division, root growth, and stem elongation, increasing the surface area of roots such that plants con obtain additional water and nutrients [35]. A large number of studies have focused on the role of PGPR in promoting crop growth [36,37]. However, bacteria are not a complete substitute for fertilizers.…”

Section: Discussionmentioning

confidence: 99%

Beneficial bacteria activate nutrients and promote wheat growth under conditions of reduced fertilizer application

et al. 2020

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Background: Excessive application of chemical fertilizer has exerted a great threat to soil quality and the environment. The inoculation of plants with plant-growth-promoting rhizobacteria (PGPR) has emerged as a great prospect for ecosystem recovery. The aim of this work to isolate PGPRs and highlights the effect of bacterial inoculants on available N/P/K content in soil and on the growth of wheat under conditions of reduced fertilizer application. Results: Thirty-nine PGPRs were isolated and tested for their growth-promoting potential. Thirteen isolates had nitrogen fixation ability, of which N9 (Azotobacter chroococcum) had the highest acetylene reduction activity of 156.26 nmol/gh. Eleven isolates had efficient phosphate solubilizing ability, of which P5 (Klebsiella variicola) released the most available phosphorus in liquid medium (231.68 mg/L). Fifteen isolates had efficient potassium solubilizing ability, of which K13 (Rhizobium larrymoorei) released the most available potassium in liquid medium (224.66 mg/L). In culture medium supplemented with tryptophan, P9 (Klebsiella pneumoniae) produced the greatest amount of IAA. Inoculation with the bacterial combination K14 + 176 + P9 + N8 + P5 increased the alkali-hydrolysed nitrogen, available phosphorus and available potassium in the soil by 49.46, 99.51 and 19.38%, respectively, and enhanced the N, P, and K content of wheat by 97.7, 96.4 and 42.1%, respectively. Moreover, reducing fertilizer application by 25% did not decrease the available nitrogen, phosphorus, and potassium in the soil and N/P/K content, plant height, and dry weight of wheat. Conclusions: The bacterial combination K14 + 176 + P9 + N8 + P5 is superior candidates for biofertilizers that may reduce chemical fertilizer application without influencing the normal growth of wheat.

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Section: Discussionmentioning

confidence: 99%

Beneficial bacteria activate nutrients and promote wheat growth under conditions of reduced fertilizer application

et al. 2020

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“…Trichoderma spp. can produce volatile metabolites, including 6PAP (6-n-pentyl-6H-pyran-2-on, 6PP) [35]. This compound displays antifungal properties [72,73] and affects plant growth and leads to the development of systemic resistance [74,75].…”

Section: Discussionmentioning

confidence: 99%

“…These bacteria eliminate harmful microorganisms from the soil by producing substances toxic to pathogenic fungi (hydrolytic enzymes-chitinases, cellulases, proteases, various antibiotics and siderophores to competitively acquire ferric ion) [39,40,43]. A positive role of PGPR was observed in the cultivation of various horticultural plants [33,35,78]. Bacillus pumilus and Bacillus subtilis bacteria acted as biofertilizers in the cultivation of blackberry [35].…”

Section: Discussionmentioning

confidence: 99%

“…Useful microorganisms applied as biostimulants include, among others, bacteria: Pseudomonas spp., Bacillus spp., Arthrobacter spp., Enterobacter spp., Rhodococcus spp., Ochrobactrum spp., Serratia spp. [23,[33][34][35] and fungi: Trichoderma harzianum, Trichoderma reesei, Trichoderma atroviride, Heteroconium chaetospira, Claroideoglomus etunicatum, and Glomus intraradices [6,25,[36][37][38]. These microorganisms, inhabiting the rhizosphere soil and colonizing plant roots, belong to the PGPM (plant growth-promoting microorganisms) group [6,23,24,[33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…[23,[33][34][35] and fungi: Trichoderma harzianum, Trichoderma reesei, Trichoderma atroviride, Heteroconium chaetospira, Claroideoglomus etunicatum, and Glomus intraradices [6,25,[36][37][38]. These microorganisms, inhabiting the rhizosphere soil and colonizing plant roots, belong to the PGPM (plant growth-promoting microorganisms) group [6,23,24,[33][34][35]. Among them, we can distinguish PGPR (plant growth-promoting rhizobacteria) [23,24,33] and PGPF (plant growth-promoting fungi) [6,25,38].…”

Section: Introductionmentioning

confidence: 99%

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Biostimulants Managed Fungal Phytopathogens and Enhanced Activity of Beneficial Microorganisms in Rhizosphere of Scorzonera (Scorzonera hispanica L.)

Patkowska

2021

Agriculture

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The principles of good agricultural and horticultural practice, considering both environmental protection and high yielding of plants, require modern cultivation methods. In modern agriculture, it is possible to use biostimulants that protect the soil against degradation and plants against phytopathogens and stress. The purpose of 3-year field and laboratory studies was to determine the effect of Trichoderma harzianum T-22 and other biostimulants on the health status of scorzonera (Scorzonera hispanica L.) plants and microorganism populations in the rhizosphere of this plant. For this purpose, Biosept Active (a.s.—grapefruit extract), Timorex Gold 24 EC (based on tea tree oil), Trianum P (spores of Trichoderma harzianum Rifai T-22) and Zaprawa Nasienna T 75 DS/WS fungicide (a.s.—tiuram) were applied for the pre-sowing seed dressing of scorzonera cv. “Duplex”. The number of seedlings and the health status of scorzonera plants were determined during three growing seasons. In each year of the study, mycological analysis of seedling roots and roots after scorzonera harvest was conducted to establish the quantitative and qualitative composition of fungi colonizing these parts. Moreover, microbiological analyses of scorzonera rhzisphere soil were conducted and served as the basis to determine the total population of fungi and bacteria (including Pseudomonas sp. and Bacillus sp.). Antagonistic activity of rhizosphere bacteria Pseudomonas sp., Bacillus sp. and fungi was determined based on laboratory tests on selected scorzonera soil-borne fungal pathogens (Alternaria scorzonerae, Fusarium culmorum, Fusarium oxysporum, and Rhizoctonia solani). The experiments showed that Trianum P most effectively protected the roots of scorzonera against infection by Alternaria alternata, A. scorzonerae, Neocosmospora solani, Fusarium spp., Sclerotinia sclerotiorum, Rhizoctonia solani, and Botrytis cinerea. The rhizosphere population of Bacillus sp. and Pseudomonas sp. in the treatments with Trianum P or Zaprawa Nasienna T 75 DS/WS was larger than in the other experimental treatments. A reverse relationship was observed in the population of rhizosphere fungi. The application of grapefruit extract, tea tree oil and Trichoderma harzianum T-22 increased antagonistic activity of Pseudomonas sp., Bacillus sp. and selected saprotrophic fungi against soil-borne fungal pathogens, especially Alternaria sp., Rhizoctonia sp., and Fusarium sp. In summary, Biosept Active, Timorex Gold 24 EC and Trianum P can be recommended as plant biostimulants in Scorzonera hispanica cultivation.

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Propagation and Cultivation

Ramírez¹

2023

Latin American Blackberries Biology

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Influence of plant growth-promoting rhizobacteria (PGPR) on blackberry (Rubus glaucus Benth. cv. thornless) growth under semi-cover and field conditions

Cited by 10 publications

References 12 publications

Beneficial bacteria activate nutrients and promote wheat growth under conditions of reduced fertilizer application

Beneficial bacteria activate nutrients and promote wheat growth under conditions of reduced fertilizer application

Biostimulants Managed Fungal Phytopathogens and Enhanced Activity of Beneficial Microorganisms in Rhizosphere of Scorzonera (Scorzonera hispanica L.)

Propagation and Cultivation

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