Impact of Plant Growth-Promoting Rhizobacteria Inoculation on the Physiological Response and Productivity Traits of Field-Grown Tomatoes in Hungary

Nemeskéri, Eszter; Horváth, K.; Andryei, Bulgan; Ilahy, Riadh; Takács, Sándor; Neményi, András; Pék, Zoltán; Helyes, Lájos

doi:10.3390/horticulturae8070641

Cited by 8 publications

(7 citation statements)

References 54 publications

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“…Zhang et al, 2022 reported that Bacillus pumilus inoculation that Streptomyces strains IT25 and C-2012 not only suppressed the signals of stress in tomato plants but also improved plant water in the form of RWC. Nemeskeri et al (2022) stated that inoculation of Pseudomonas sp. MUS04 in tomato plants improved the water uptake and also decreased the plant temperature as compared with noninoculated stressed plants.…”

Section: Discussionmentioning

confidence: 99%

“…(2020) reported that Streptomyces strains IT25 and C-2012 not only suppressed the signals of stress in tomato plants but also improved plant water status in the form of RWC. Nemeskeri et al. (2022) stated that inoculation of Pseudomonas sp.…”

Section: Discussionmentioning

confidence: 99%

“…PGPB confer tolerance to drought stress in plants by improving the plant′s ability to produce osmoprotectants like proline (Ngumbi and Kloepper, 2016). Bacterial communities not only alter the hormonal balance of the roots but also improve plant nutrient and water uptake, resulting in microbial colonization and symbiotic relationships (Nemeskeri et al, 2022). Nemeskeri et al (2019) reported that an improvement in plant water uptake also reduced the plant temperature as compared with noninoculated stressed plants as high plant temperature has an adverse impact on yield.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mitigation of water scarcity with sustained growth of Rice by plant growth promoting bacteria

et al. 2023

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Climate change augments the risk to food security by inducing drought stress and a drastic decline in global rice production. Plant growth-promoting bacteria (PGPB) have been known to improve plant growth under drought stress. Here in the present study, we isolated, identified, and well-characterized eight drought-tolerant bacteria from the rice rhizosphere that are tolerant to 20% PEG-8000. These strains exhibited multiple plant growth-promoting traits, i.e., 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, exopolysaccharide production, phosphate (P)-solubilizing activity (51–356 µg ml-1), indole-3 acetic acid (IAA) production (14.3–46.2 µg ml-1), and production of organic acids (72–178 µg ml-1). Inoculation of bacterial consortium (Bacillus subtilis NM-2, Brucella haematophilum NM-4, and Bacillus cereus NM-6) significantly improved seedling growth and vigor index (1009.2-1100) as compared to non-inoculated stressed plants (630-957). Through rhizoscanning, efficiency of the consortium was validated by improved root parameters such as root length (17%), diameter, and surface area (18%) of all tested genotypes as compared with respective non-inoculated stressed treatments. Furthermore, the response of consortium inoculation on three rice genotypes was positively correlated with improved plant growth and drought stress ameliorating traits by the accumulation of osmoprotectant, i.e., proline (85.8%–122%), relative water content (51%), membrane stability index (64%), and production of antioxidant enzymes to reduce oxidative damage by reactive oxygen species. A decrease in temperature and improved chlorophyll content of inoculated plants were found using infrared thermal imaging and soil plant analyzer development (SPAD), respectively. The key supporting role of inoculation toward stress responses was validated using robust techniques like infrared thermal imaging and an infrared gas analyzer. Furthermore, principal component analysis depicts the contribution of inoculation on stress responses and yield of tested rice genotypes under water stress. The integration of drought-tolerant rice genotype (NIBGE-DT02) and potential bacterial strains, i.e., NM-2, NM-4, and NM-6, can serve as an effective bioinoculant to cope with water scarcity under current alarming issues related to food security in fluctuating climate.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mitigation of water scarcity with sustained growth of Rice by plant growth promoting bacteria

et al. 2023

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“…Nemeskéri et al [10], analyzed the use of plant growth-promoting rhizobacteria (PGPR) to promote tolerance to drought stress in tomato cultivars. Drought-tolerant PGPR may support plant development under limited water supply conditions when the plant's water demand is not completely satisfied under rain-fed conditions or when the availability of irrigation water is limited.…”

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confidence: 99%

Drought Stress in Horticultural Plants

2022

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Microbial inoculants alter resilience towards drought stress in wheat plants

Singh,

Sharma,

Giri

2023

Plant Growth Regul

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The present study aimed to investigate the role of Piriformospora indica, arbuscular mycorrhiza fungi (AMF), and plant growth-promoting bacteria (PGPB) in alleviating drought stress in the HD-2967 wheat cultivar. In a completely randomized design experiment, plants were subjected to different water regimes of 75 and 35% eld capacity (FC) under greenhouse conditions. Under different water regimes, microbial inoculation signi cantly enhanced the morphological, physico-biochemical, and ultrastructural characteristics of the wheat plants. Plants inoculated with PGPB, P. indica, and AMF showed increased shoot and root length, shoot and root biomass, leaf area, photosynthetic rate, transpiration rate, stomatal conductance, and internal CO 2 as compared to uninoculated plants under all water regimes. The PGPB, P.indica, and AMF-inoculated wheat plants accumulated higher content of glycine betaine, total sugars, trehalose, proline, putrescine, spermidine, carotenoids, proteins, α-tocopherol, and a decrease in lipid peroxidation, relative membrane permeability, and lipoxygenase enzyme (LOX) activity as compared to uninoculated plants. Besides, microbes-inoculated wheat plants showed a higher level of antioxidant enzymes viz., superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) than uninoculated plants. Microbial inoculation helped wheat plants to overcome water stress-induced de ciency of macro-(Ca 2+ , Mg 2+ , and K + ) and micronutrient (Cu, Mn 2+ , Fe, and Zn 2+ ), and reduced damage to the cell ultrastructure (plasma membrane and chloroplasts). Comparing the potential of microbial inoculants to increase growth and nutritional, biochemical, physiological, and ultrastructural changes, the PGPB-inoculated wheat plants showed greater drought resilience followed by AMF and P. indica inoculated plants. These microbial inoculants offer a signi cant potential to meet the challenges of sustainable agriculture under drought conditions. in host plants under drought conditions has been poorly studied (Rajput et al. 2022;Mahreen et al. 2023).Studies have reported that PGPB, AMF, and P. indica inoculated plants under drought conditions have higher levels of osmolytes, including proline, glycine betaine, total sugars, reduced lipid peroxidation, and membrane integrity. However, no attempt has been made to link this to ultrastructural damage prevention.The role of macronutrients (Ca 2+ , Mg 2+ , K + , Na + ) and micronutrients (Cu, Fe, Mn 2+ , and Zn 2+ ) in plants under stress conditions has been studied by some researchers (Rahmani et al. 2023). However, not much attention has been paid to the role of the PGPB consortium, AMF consortium, and P. indica colonization in increasing nutrient uptake during drought stress. Membrane permeability has not been discussed in relation to nutritional imbalance. Taking this into account, the present study was undertaken to investigate the role of inoculation of PGPB (Azotobacter chroococcum, Enterobacter asburiae, and Lactococcus lactis), AMF (Glomus intraradices, Glomus mo...

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Impact of Plant Growth-Promoting Rhizobacteria Inoculation on the Physiological Response and Productivity Traits of Field-Grown Tomatoes in Hungary

Cited by 8 publications

References 54 publications

Mitigation of water scarcity with sustained growth of Rice by plant growth promoting bacteria

Mitigation of water scarcity with sustained growth of Rice by plant growth promoting bacteria

Drought Stress in Horticultural Plants

Microbial inoculants alter resilience towards drought stress in wheat plants

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