Selection of plant growth-promoting bacteria in sweet sorghum (Sorghum bicolor (L.) Moench) under the effects of salinity

In this study the plant growth-promoting bacteria were analysed for their growth-stimulating effects on two wheat cultivars. The investigations were carried out in pot experiments using calcareous soil. The results showed that bacterial strains Pseudomonas spp. NUU1 and P. fluorescens NUU2 were able to colonize the rhizosphere of both wheat cultivars. Their plant growth-stimulating abilities were affected by wheat cultivars. The bacterial strains Pseudomonas sp. NUU1 and P. fluorescens NUU2 significantly stimulated the shoot and root length and dry weight of wheat cv. Turon, whereas cv. Residence was less affected by bacterial inoculation. The results of our study suggest that inoculation of wheat with Pseudomonas strains can improve plant growth in calcareous soil and it depends upon wheat cultivars. Prior to a selection of good bacterial inoculants, it is recommended to select cultivars that benefit from association with these bacteria.

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Interaction between sugarcane families and plant growth-promoting bacteria in two crop cycles

Semina Ciências Agrárias ◽

10.5433/1679-0359.2019v40n2p527 ◽

2019 ◽

Vol 40 (2) ◽

pp. 527 ◽

Cited By ~ 2

Author(s):

Valéria Rosa Lopes ◽

João Carlos Bespalhok Filho ◽

Guilherme Grodzki Oliveira Figueiredo ◽

Ricardo Augusto de Oliveira ◽

Edelclaiton Daros

Keyword(s):

Plant Growth ◽

Average Height ◽

Plant Growth Promoting Bacteria ◽

Plant Genotype ◽

Saccharum Spp ◽

Stalk Diameter ◽

Plant Growth Promoting ◽

Azospirillum Amazonense ◽

Growth Promoting ◽

Selection Of

The response of sugarcane (Saccharum spp.) families to the inoculation with plant growth-promoting bacteria (PGPB) may show positive or negative interaction values depending on the plant genotype, allowing the selection of responsive genotypes to the association. Based on these precepts, this study aimed to evaluate the response of 27 sugarcane families treated with two PGPB-based inoculants in two sugarcane cycles: plant-cane and first ratoon. Four months after germination, 27 families from crosses between clones of sugarcane were: (T0) not inoculated; (T1) inoculated with Triazo, which consists of a mixture of the strains Abv5, Abv6, and Abv7 of Azospirillum brasilense; and (T2) inoculated with an inoculant called Mix, which contains five strains of PGPB (Gluconacetobacter diazotrophicus Pal5, Azospirillum amazonense CBAmC, Burkholderia tropica Ppe8, Herbaspirillum rubrisubalbicans HCc103, and Herbaspirillum seropedicae HRC54). The productivity traits evaluated were the number of stalks, average height, stalk diameter, and Brix. The correlation values between the two cycles were 0.87 for the number of stalks, 0.70 for average height, 0.48 for stalk diameter, and 0.63 for Brix. Differences were observed between treatments for average height, stalk diameter, and Brix. Differences were also observed between families for all the studied traits. Brix was the only parameter that presented a significant interaction between family and inoculant. Different responses were observed between cycles for some families, showing that other factors can also influence the association.

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Exploiting plant growth-promoting Amycolatopsis sp. for bio-control of charcoal rot of sorghum (Sorghum bicolor L.) caused by Macrophomina phaseolina (Tassi) Goid

Archives of Phytopathology and Plant Protection ◽

10.1080/03235408.2018.1553472 ◽

2019 ◽

Vol 52 (7-8) ◽

pp. 543-559

Author(s):

S. Gopalakrishnan ◽

V. Srinivas ◽

N. Naresh ◽

G. Alekhya ◽

R. Sharma

Keyword(s):

Plant Growth ◽

Sorghum Bicolor ◽

Macrophomina Phaseolina ◽

Charcoal Rot ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Sorghum Bicolor L

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Plant growth‐promoting activity of endophytic bacteria from sweet sorghum (Sorghum bicolor (L.) Moench)

Indonesian Journal of Biotechnology ◽

10.22146/ijbiotech.64893 ◽

2021 ◽

Vol 26 (4) ◽

pp. 190

Author(s):

Charlie Ester De Fretes ◽

Donny Widianto ◽

Yekti Asih Purwestri ◽

Tri Rini Nuringtyas

Keyword(s):

Plant Growth ◽

Sweet Sorghum ◽

Endophytic Bacteria ◽

Environmental Damage ◽

Plant Growth Promoting Bacteria ◽

Bacillus Sp ◽

Chemical Fertilizers ◽

Paenibacillus Sp ◽

Plant Growth Promoting ◽

Growth Promoting

Application of high levels of chemical fertilizers for optimal growth of sweet sorghum causes environmental degradation. Plant growth‐promoting bacteria have biotechnological importance because they can improve the growth and health of important agronomic plants. This study aimed to isolate, characterize, and identify endophytic bacteria associated with sweet sorghum (cv. KCS105), and also to study the inoculation effects of selected isolates on sorghum growth. In this study, 35 isolates were evaluated for their ability to support plant growth. The results showed that seven isolates were diazotrophic, six were capable of dissolving phosphate, six produced IAA and could detect ACC‐deaminase activity, and three inhibited the growth of pathogenic fungi. Nine isolates exhibiting mechanisms for promoting plant growth from the Alphaproteobacteria (Devosia), Firmicutes (Bacillus, Paenibacillus, Staphylococcus), and Actinobacteria (Microbacterium, Brachybacterium) phyla were identified. In addition, the Paenibacillus sp. BB7, Bacillus sp. PIB1B, and Bacillus sp. PLB1B isolates showed increasing effects on plant growth in greenhouse tests. Endophytic bacterial isolates which display plant growth‐promoting features can potentially be employed as biofertilizer agents. They may also address environmental damage problems resulting from the use of chemical fertilizers and pesticides.

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Detection and Identification of Plant Growth Promoting Bacteria from Sorghum (Sorghum bicolor L. Moench) Rhizosphere Soil in Northern Ethiopia

Biosciences Biotechnology Research Asia ◽

10.13005/bbra/2935 ◽

2021 ◽

Vol 18 (3) ◽

pp. 497-515

Author(s):

Birhanu Babiye ◽

Beira H. Meressa ◽

Taye Tessema

Keyword(s):

Plant Growth ◽

Sorghum Bicolor ◽

Dry Weight ◽

Plant Growth Promoting Rhizobacteria ◽

Production Test ◽

Iaa Production ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Sorghum Production ◽

Sorghum Bicolor L

Plant growth promoting rhizobacteria are the bacteria which subsist inside and outside of the plant tissue and promote plant growth through direct or indirect mechanisms. To increase sorghum production and productivity we utilize herbicides and chemical fertilizers to overcome sorghum production constraints, but those chemicals have negative side effects. The current study was conducted with the objective of isolation of PGPR from sorghum rhizosphere and screening for primary growth related trait, evaluation of potential PGPR at greenhouse for sorghum growth performance and identify through biochemical characterization. So that, in this study a total of 117 plant growth promoting rhizobacteria were isolated from the rhizosphere of 12 sorghum (Sorghum bicolor L. Moench) genotype by cultivating using 3 collected soil samples from the northern part of Ethiopia (Amhara and Tigray regional states) in greenhouse. Isolated bacteria were screened for primary growth promoting traits such as phosphate solubilization test, IAA production test at different concentration of L-tryptophan and ammonia production test. From the isolated bacteria 28% solubilized Phosphorous, 78% produced IAA at different concentration of tryptophan. The greatest IAA production was scored at 100 mg/L of tryptophan and the lowest production of IAA was scored at 150 mg/L of tryptophan, 69% of isolated bacteria produced ammonia. Hence, 15% of isolated bacteria fulfilled the above primary screening test and used for further greenhouse evaluation. Accordingly, eighteen bacteria were tested for greenhouse experiment using completely randomized design and all 18 isolates were significantly increased all the agronomic parameter as compared to the control such as plant shoot height, plant shoot fresh and dry weight, root length, root fresh and dry weight at p < 0.01 and P ≤ 0.001. Two isolates G6E29 and G4E19 had significantly increased all the parameter but two isolates (G12E19 and G3E40) were statistically non-significant for root fresh weight compared to the control. These 18 potential isolates were characterized morphologically and biochemically. Eight isolates were grouped at Pseudomonas genera. Six isolates were grouped at Azotobacter and the rest four isolates were grouped at Bacillus genera. Thus, the use of plant growth promoting rhizosphere bacteria could be useful to improve sorghum production and productivity. However, further molecular identification and evaluation of the isolates exhibiting multiple plant growths promoting traits on plant-microbe interaction for economic crop of Ethiopia is needed to uncover their efficacy as effective plant growth promoting rhizosphere bacteria.

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