Effects of Bacillus amyloliquefaciens QST713 on Photosynthesis and Antioxidant Characteristics of Alfalfa (Medicago sativa L.) under Drought Stress

Han, Lingjuan; Zhang, Miaoling; Du, Li-xia; Zhang, Li; Li, Bin

doi:10.3390/agronomy12092177

Cited by 27 publications

(12 citation statements)

References 47 publications

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“…These results are similar to the studies by Kamran et al [47], where it has been demonstrated that plant growth-promoting bacteria can enhance chlorophyll concentration in plants subjected to salt stress. Furthermore, research such as that of Han et al [48] has supported the association between bacterial inoculation and increased chlorophyll concentration, implying a direct influence on plant photosynthesis and performance. Collectively, these findings support the idea that the rhizobacterium B. paralicheniformis LBEndo1 might be optimizing the chlorophyll concentration in seedling leaves.…”

Section: Discussionmentioning

confidence: 91%

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Palacio-Rodríguez,

Sáenz-Mata,

Trejo-Calzada

et al. 2023

Agronomy

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Pecan cultivation holds significant global importance. Salinity negatively affects the physiology and metabolism of the plant. However, certain plant growth-promoting rhizobacteria (PGPR) have the ability to reduce salt stress in plants. The objective was to analyze the effects of the rhizobacteria Bacillus paralicheniformis strain LBEndo1 on the development of pecan seedlings under salinity stress conditions. Two factors were analyzed: the presence of saline stress and the bacterial inoculation. The bacterial application was conducted at a concentration of 1 × 108 CFU/mL, and irrigation was administered every third day with 80 mL of water containing 50 mM NaCl. The results show that the rhizobacteria has a maximum tolerance of 15% salinity. Furthermore, the inoculation of PGPR significantly increased the biomass of the seedlings, including the dry weight of leaves, stem, and roots, as well as the stem diameter and height. Furthermore, seedlings that interacted with the rhizobacteria exhibited superior development under saline conditions, with significant increases of 105.5% in chlorophyll concentration and 112% in proline accumulation compared to non-inoculated seedlings. Additionally, a remarkable reduction in leaf damage caused by salt stress was observed. In conclusion, the LBEndo1 rhizobacteria, being a strain resistant to salinity and possessing multiple mechanisms to promote growth while mitigating salt stress, has the potential to be utilized in pecan seedlings to alleviate stress caused by salinity and increases biomass.

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Section: Discussionmentioning

confidence: 91%

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Palacio-Rodríguez,

Sáenz-Mata,

Trejo-Calzada

et al. 2023

Agronomy

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“…Likewise, it is remarkable that B. ginsengihumi ATNJC22015 produced a higher increase in A in lettuce plants, improving both under well-irrigated and drought conditions compared to non-inoculated plants. Consequently, PGPR delay stomatal closure and transpiration under water stress by enhancing water absorption and they exert a positive influence on the activity of the photosynthetic apparatus, resulting in a smaller decline in photosynthesis [ 84 ].…”

Section: Discussionmentioning

confidence: 99%

Enhancing Water Status and Nutrient Uptake in Drought-Stressed Lettuce Plants (Lactuca sativa L.) via Inoculation with Different Bacillus spp. Isolated from the Atacama Desert

Santander,

González,

Pérez

et al. 2024

Plants

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Drought is a major challenge for agriculture worldwide, being one of the main causes of losses in plant production. Various studies reported that some soil’s bacteria can improve plant tolerance to environmental stresses by the enhancement of water and nutrient uptake by plants. The Atacama Desert in Chile, the driest place on earth, harbors a largely unexplored microbial richness. This study aimed to evaluate the ability of various Bacillus sp. from the hyper arid Atacama Desert in the improvement in tolerance to drought stress in lettuce (Lactuca sativa L. var. capitata, cv. “Super Milanesa”) plants. Seven strains of Bacillus spp. were isolated from the rhizosphere of the Chilean endemic plants Metharme lanata and Nolana jaffuelii, and then identified using the 16s rRNA gene. Indole acetic acid (IAA) production, phosphate solubilization, nitrogen fixation, and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity were assessed. Lettuce plants were inoculated with Bacillus spp. strains and subjected to two different irrigation conditions (95% and 45% of field capacity) and their biomass, net photosynthesis, relative water content, photosynthetic pigments, nitrogen and phosphorus uptake, oxidative damage, proline production, and phenolic compounds were evaluated. The results indicated that plants inoculated with B. atrophaeus, B. ginsengihumi, and B. tequilensis demonstrated the highest growth under drought conditions compared to non-inoculated plants. Treatments increased biomass production and were strongly associated with enhanced N-uptake, water status, chlorophyll content, and photosynthetic activity. Our results show that specific Bacillus species from the Atacama Desert enhance drought stress tolerance in lettuce plants by promoting several beneficial plant traits that facilitate water absorption and nutrient uptake, which support the use of this unexplored and unexploited natural resource as potent bioinoculants to improve plant production under increasing drought conditions.

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“…The compounds give a potential to the studied Bacillus strain to effectively resist bacterial and fungal plant pathogens, and improve the prospects of using as a biological control agent [6]. The studies of Chinese scientists also show that QST 713, as a rhizobacterium, can mitigate the drought stress damage to medick seedlings by increasing the activity of antioxidant enzymes, and by improving photosynthetic characteristics [8]. In 2021, the product Serenade ASO, SC was registered in the EU as a fungicide to control Botrytis cinerea on grapes and strawberries, including in protected ground [7].…”

Section: Introductionmentioning

confidence: 98%

The prospects of using Bacillus amyloliquefaciens in the biological control of grape diseases

Aleinikova

Galkina

Andreyev

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Currently, the prospects of effective control management in the development of gray (Botrytis cinerea Pers.) and black rot (Macrophoma flaccida (Viala et Rav.) Cav.), as well as the guaranteed preservation of grape yield, can be achieved with the development of ecological approach - the use of microbiological preparations or substances of biological origin. The antagonistic activity of biological fungicide Serenade ASO, SC (titer not less than 1x109 CFU/ml of Bacillus amyloliquefaciens, strain QST 713) was studied in the field research vineyards of the South-Western (SWC) and South Coastal (SCC) viticulture zones of Crimea in 2018-2019. Against the background of weak development of gray rot on bunches of ‘Cabernet-Sauvignon’ grapes (SCC), the maximum biological efficiency was obtained in the variant with five-fold spraying of Serenade ASO, SC, application rate of 5 l/ha and seven days interval. Two-fold protective use of biological preparation Serenade ASO, SC and application rate of 5 l/ha on the plot of ‘Muscat Blanc’ variety (SCC) in 2020 made it possible to control the development of black rot at the level of 76.7-79%. The obtained results indicate good prospects of biological preparation Serenade ASO, SC (titer not less than 1x109 CFU/ml of Bacillus amyloliquefaciens, strain QST 713) to control gray and black rot of grapes during ripening, when the use of chemical fungicides is not appropriate due to their lagged effect.

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Effects of Bacillus amyloliquefaciens QST713 on Photosynthesis and Antioxidant Characteristics of Alfalfa (Medicago sativa L.) under Drought Stress

Cited by 27 publications

References 47 publications

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Halotolerant Rhizobacteria Promote Plant Growth and Decrease Salt Stress in Carya illinoinensis (Wangenh.) K. Koch

Enhancing Water Status and Nutrient Uptake in Drought-Stressed Lettuce Plants (Lactuca sativa L.) via Inoculation with Different Bacillus spp. Isolated from the Atacama Desert

The prospects of using Bacillus amyloliquefaciens in the biological control of grape diseases

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