THE EFFECT OF ENDOPHYTIC BACTERIA Bacillus thuringiensis W65 AND B. amyloliquefaciens P20 ON THE YIELD AND THE INCIDENCE OF POTATO RHIZOCTONIOSIS AND LATE BLIGHT

Chebotar, Vladimir

doi:10.15389/agrobiology.2023.3.429eng

Cited by 4 publications

(7 citation statements)

References 55 publications

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“…Halophytic plants are the best model for the isolation of bacterial endophytes helping with the elimination of excess salt concentrations [ 43 , 44 , 45 , 46 , 47 ]. Many bacteria of the genus Bacillus are able to stimulate plant growth and provide protection under biotic and abiotic stresses [ 48 , 49 , 50 , 51 , 52 ].…”

Section: Discussionmentioning

confidence: 99%

Phytohormone Production by the Endophyte Bacillus safensis TS3 Increases Plant Yield and Alleviates Salt Stress

Chebotar,

Zaplatkin,

Chizhevskaya

et al. 2023

Plants

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Endophytic bacteria can be used to overcome the effect of salinity stress and promote plant growth and nutrient uptake. Bacillus safensis colonizes a wide range of habitats due to survival in extreme environments and unique physiological characteristics, such as a high tolerance for salt, heavy metals, and ultraviolet and gamma radiations. The aim of our study was to examine the salt resistance of the endophytic strain TS3 B. safensis and its ability to produce phytohormones and verify its effect on plant yield in field trials and the alleviation of salt stress in pot experiments. We demonstrate that the strain TS3 is capable of producing enzymes and phytohormones such as IAA, ABA and tZ. In pot experiments with radish and oat plants in salinization, the strain TS3 contributed to the partial removal of the negative effect of salinization. The compensatory effect of the strain TS3 on radish plants during salinization was 46.7%, and for oats, it was 108%. We suppose that such a pronounced effect on the plants grown and the salt stress is connected with its ability to produce phytohormones. Genome analysis of the strain TS3 showed the presence of the necessary genes for the synthesis of compounds responsible for the alleviation of the salt stress. Strain B. safensis TS3 can be considered a promising candidate for developing biofertilizer to alleviate salt stress and increase plant yield.

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Section: Discussionmentioning

confidence: 99%

Phytohormone Production by the Endophyte Bacillus safensis TS3 Increases Plant Yield and Alleviates Salt Stress

Chebotar,

Zaplatkin,

Chizhevskaya

et al. 2023

Plants

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“…Improving the production of high-quality potato tubers both for seeds and consumption with PGP endophytic bacteria is a promising, yet underexplored direction in agronomy research. Several studies showed that treatment of tubers pre-planting with microbiological preparations based on endophytic bacteria has a positive influence on potato yield [37][38][39]. For example, the endophytes P. xylanexedens N40 and B. thuregiensis W65 increased tuber yield and considerably decreased, in a variety-specific manner, the prevalence of phytophthorosis, fusariosis, and common scab on tubers [37].…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, the findings revealed a strain-dependent manner of endophyte influences on potatoes: particularly, strain 26D resulted in the formation of a greater number of large tubers, which is preferable for marketable potatoes; however, upon treatment with strain 10-4, there was a greater number of tubers with average sizes, which is preferable for seed production (Table 3). Interestingly, in a recent study, Chebotar et al [39] reported the variety-dependent influence of endophytic bacteria Bacillus sp. X20 and B. thuringiensis W65 on potato yield.…”

Section: Discussionmentioning

confidence: 99%

“…While several studies have been published on the application of different rhizobacteria in high-quality potato seed production [6][7][8]11,[14][15][16], there is no information concerning the use of bacterial endophytes for obtaining high-quality seed tubers. Most studies have focused on the application of endophytic PGP microorganisms using methods such as pre-planting inoculation of non-sterile seeds or inoculation of vegetative plants via spraying, with assessment primarily focused on growth, general yield, and quality attributes [37][38][39]. Less attention has been given to understanding the underlying physiological, biochemical, and molecular mechanisms responsible for establishing effective plant-microbe interactions.…”

Section: Introductionmentioning

confidence: 99%

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The Potential of Hydroponic Seed Minituber Enrichment with the Endophyte Bacillus subtilis for Improving the Yield Components and Quality of Potato (Solanum tuberosum L.)

Pusenkova,

Lastochkina,

Ercişli

2023

Agriculture

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This study examined the potential of using the endophytic bacteria Bacillus subtilis (10-4 and 26D) to enrich hydroponically grown potato seed minitubers (Solanum tuberosum L. cv. Bashkirsky) to improve plant growth, photosynthetic pigments, yield, and quality parameters, including nutritional value (i.e., macro-/microelements, vitamin C, anthocyanins). Potato seed minitubers, obtained from in-vitro-grown microplants in a hydroponic system, were inoculated with endophytic B. subtilis and subsequently grown in pots under controlled conditions. The results demonstrated the successful colonization of seed minitubers by B. subtilis, with subsequent distribution into growing plants (roots, shoots). The endophytes accelerated the plant’s phenological shifts, resulting in earlier emergence of sprouts, budding, and flowering compared with control plants. They also had increased leaf photosynthetic pigments (chlorophyll (Chl) a, Chl b, and carotenoids), total leaf area, and positively influenced leaf proline contents. The height of plants and number of stems per plant did not change significantly upon endophyte treatment, but improved root growth was observed throughout the experiment. As a result of endophyte application, there was an increase in stolon weight, number and size of tubers, and overall tuber yield. There were no significant differences in terms of total dry matter and starch content of the tubers compared to the control group, but the sugar levels decreased and the size of the starch grains was larger in endophyte-treated tubers. Furthermore, endophyte treatment resulted in an increased accumulation of nutrients including N, P, K, Cu, and Fe, as well as vitamin C and anthocyanins in harvested tubers. These findings indicate that colonization of hydroponically grown potato seed minitubers with endophytic B. subtilis (10-4 and 26D) before planting has great potential as an eco-friendly approach to obtain higher-quality seeds and to increase tuber yield and nutritional value in field conditions.

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“…The endophytic bacterium Bt W65, isolated from potato shoots, increased the duration of the flowering of plants of the corresponding culture by 8-13 days compared to control. The yield of tubers also increased by 7.9-14.6%, and with the joint inoculation of tubers with B. amyloliquefaciens and Bt W65 cells, an increase in the yield of large tubers and a decrease in the presence of infectious agents in plantings was observed [64]. Similarly, the potassium-solubilizing B. cereus strain WR34 efficiently promoted plant growth and the accumulation of dry biomass of the aerial part of the potato, which increased the yield of this crop by 20% compared to the control plots [153].…”

Section: Plant-growth Promoting Effectmentioning

confidence: 93%

Plant-Associated Bacillus thuringiensis and Bacillus cereus: Inside Agents for Biocontrol and Genetic Recombination in Phytomicrobiome

Sorokan,

Gabdrakhmanova,

Kuramshina

et al. 2023

Plants

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Bacillus thuringiensis Berliner (Bt) and B. cereus sensu stricto Frankland and Frankland are closely related species of aerobic, spore-forming bacteria included in the B. cereus sensu lato group. This group is one of the most studied, but it remains also the most mysterious species of bacteria. Despite more than a century of research on the features of these ubiquitous bacteria, there are a lot of questionable issues related to their taxonomy, resistance to external influences, endophytic existence, their place in multidimensional relationships in the ecosystem, and many others. The review summarizes current data on the mutualistic relationships of Bt and B. cereus bacteria with plants, the structure of the phytomicrobiomes including Bt and B. cereus, and the abilities of plant-associated and endophytic strains to improve plant resistance to various environmental factors and its productivity. Key findings on the possibility of the use of Cry gene promoter for transcription of the target dsRNA and simultaneous release of pore-forming proteins and provocation of RNA-interference in pest organisms allow us to consider this group of microorganisms as unique tools of genetic engineering and biological control. This will open the prospects for the development and direct change of plant microbiomes, and possibly serve as the basis for the regulation of the entire agroecosystem.

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THE EFFECT OF ENDOPHYTIC BACTERIA Bacillus thuringiensis W65 AND B. amyloliquefaciens P20 ON THE YIELD AND THE INCIDENCE OF POTATO RHIZOCTONIOSIS AND LATE BLIGHT

Cited by 4 publications

References 55 publications

Phytohormone Production by the Endophyte Bacillus safensis TS3 Increases Plant Yield and Alleviates Salt Stress

Phytohormone Production by the Endophyte Bacillus safensis TS3 Increases Plant Yield and Alleviates Salt Stress

The Potential of Hydroponic Seed Minituber Enrichment with the Endophyte Bacillus subtilis for Improving the Yield Components and Quality of Potato (Solanum tuberosum L.)

Plant-Associated Bacillus thuringiensis and Bacillus cereus: Inside Agents for Biocontrol and Genetic Recombination in Phytomicrobiome

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