Plant growth-promoting activities of fluorescent pseudomonads, isolated from the Iranian soils

Abbaszadeh, Peyman; Saleh‐Rastin, N.; Asadi-Rahmani, H.; Khavazi, K; Soltani, Ahmad; Shoary-Nejati, A. R.; Miransari, Mohammad

doi:10.1007/s11738-009-0405-1

Cited by 55 publications

(20 citation statements)

References 34 publications

(36 reference statements)

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“…These methods concern seed and seedling treatment with using plant growth-promoting rhizobacteria (Yue et al, 2007), such as symbiotic bacteria capable to attach root systems and promote their absorption of ambient nutrients necessary for plants growth, development, and stress resistance (Abbas-Zadeh et al, 2010). Bacteria such as Azotobacter and rhizobacteria have been reported increasing plant height and regeneration through production and synthesis of phytohormones (Abbas-Zadeh et al, 2010; Kanchana et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Salinity tolerance of Dodonaea viscosa L. inoculated with plant growth-promoting rhizobacteria: assessed based on seed germination and seedling growth characteristics

et al. 2017

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Yousefi, S., Kartoolinejad, D., Bahmani, M., Naghdi, R., 2017. Salinity tolerance of Dodonaea viscosa L. inoculated with plant growth-promoting rhizobacteria: assessed based on seed germination and seedling growth characteristics. Folia Oecologica, 44: 20-27.The study was conducted to evaluate the potential of different strains of plant growth-promoting rhizobacteria (PGPR) to reduce the effects of salinity stress on the medicinal hopbush plant. The bacterium factor was applied at five levels (non-inoculated, inoculated by Pseudomonas putida, Azospirillum lipoferum + Pseudomonas putida, Azotobacter chroococcum + Pseudomonas putida, and Azospirillum lipoferum + Azotobacter chroococcum + Pseudomonas putida), and the salinity stress at six levels: 0, 5, 10, 15, 20, and 50 dS m -1 . The results revealed that Pseudomonas putida showed maximal germination percentage and rate at 20 dS m -1 (18.33% and 0.35 seed per day, respectively). The strongest effect among the treatments was obtained with the treatment combining the given 3 bacteria at 15 dS m -1 salinity stress. This treatment increased the root fresh and dry weights by 31% and 87.5%, respectively (compared to the control). Our results indicate that these bacteria applied on hopbush affected positively both its germination and root growth. The plant compatibility with the three bacteria was found good, and the treatments combining Pseudomonas putida with the other one or two bacteria discussed in this study can be applied in nurseries in order to restore and extend the area of hopbush forests and akin dry stands.

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Section: Discussionmentioning

confidence: 99%

Salinity tolerance of Dodonaea viscosa L. inoculated with plant growth-promoting rhizobacteria: assessed based on seed germination and seedling growth characteristics

et al. 2017

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“…It is still a precise method for counting microbial population, in tubes containing a semi solid NFB medium (Dobereiner and Day 1975). It should be mentioned that the following isolates characters were also determined: (1) N-fixation (nano mole/h), (2) auxin production (in a medium with tryptophan after 120 h), (3) P solubility (using the quantitative method in a RC medium), (4) siderophore production (after 98 h on a Cas-Agar medium), (5) HCN production (on a RC medium with glycine), and (6) ACC utilization (Jalili et al 2009;Abbas-Zadeh et al 2010). …”

Section: Inoculum Preparationmentioning

confidence: 99%

Wheat (Triticum aestivum L.) growth enhancement by Azospirillum sp. under drought stress

Arzanesh¹,

Alikhani

Khavazi³

et al. 2010

World J Microbiol Biotechnol

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Plant growth promoting rhizobacteria (PGPR) can enhance plant growth by alleviating soil stresses. Although previously investigated, some new interesting details are presented regarding the alleviating affects of Azospirillum sp. on wheat growth under drought stress in this research work. We hypothesized that the isolated strains of Azospirillum sp. may alleviate the adverse effects of drought stress on wheat (Triticum aestivum L.) growth. Three different strains of Azospirillum lipoferum (B1, B2 and B3) were used to inoculate wheat seedlings under drought. During the flowering stage the seedlings were subjected to three drought levels with five different time longevity, including control. Pots were water stressed at 80% (S0), 50% (S1) and 25% (S2) of field capacity moisture in a 25 day-period. Soil and plant water properties including water potential and water content, along with their effects on bacterial inoculum and wheat growth, were completely monitored during the experiment. While stress intensity significantly affected bacterial population and wheat growth, stress longevity only affected wheat water potential and water content. Compared to uninoculated treatments strain B3 (fixing and producing the highest amounts of N and auxin, respectively, with P solubilizing and ACC-deaminase activities) increased wheat yield at S1 and S2 by 43 and 109%, respectively. However, strain B2 (producing siderophore) was the most resistant strain under drought stress. The results of this experiment may elucidate the more efficient strains of Azospirillum sp. for wheat inoculation under drought stress and the mechanisms by which they alleviate the stress.

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“…Their activities including enhanced nutrients mobility, phytohormone production, controlling pathogens and stress alleviation can enhance plant growth (Glick et al 2007;Jalili et al 2009;Abbas-Zadeh et al 2010). For example, bacterial potential of phosphate solubilization and hence increased P availability in the soil solution for plant growth is considered to be an important attribute of plant growth promoting rhizobacteria (PGPR) (Afzal et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Pseudomonas bacteria and phosphorous fertilization, affecting wheat (Triticum aestivum L.) yield and P uptake under greenhouse and field conditions

Zabihi¹,

Savaghebi

Khavazi³

et al. 2010

Acta Physiol Plant

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We have recently indicated the plant growth promoting activities of Pseudomonas sp. as well as their alleviating effects on some soil stressors such as salinity. This is because in recent years, biological fertilizers have received special attention by scientists in sustainable agriculture. Accordingly, it is pertinent to specify the beneficiary level of such soil bacteria on plant growth including phosphorous (P) uptake. Hence, the objectives were to determine: (1) the plant growth promoting effects of the tested Pseudomonas sp., and (2) its combined effects with different P fertilization rates on the nutrient uptake (N, P, and K) and yield of wheat (Triticum aestivum L.) under greenhouse and field conditions. The experiments were factorially arranged on the basis of a completely randomized block design with three replicates and were conducted at the Research Farm of Agriculture and Natural Resources Research Center of Khorasan, Mashhad, Iran. P was fertilized at three levels including 0, 25 and 50 kg/ha P 2 O 5 . Pseudomonas sp. including Pseudomonas fluorescens 153, P. fluorescens 169, P. putida 4, and P. putida 108 were tested. Activities such as production of ACC deaminase and IAA-like products, as well as P solubilization were among the most important activities of the tested Pseudomonas sp. Such bacterial effects greatly enhanced wheat growth and yield under greenhouse and field conditions. The results also showed that the effects of Pseudomonas sp. on wheat nutrient uptake and the effects of bacteria as well as P fertilization on wheat yield were significant. P. putida 108 was the most effective strain enhancing wheat P uptake and grain yield under greenhouse (96 and 58%) and field (80 and 37%) conditions, respectively. Hence, although Pseudomonas sp. could be a suitable replacement for high P fertilization, however, the optimum wheat yield resulted when the bioinoculants are combined with 50% (25 kg/ha P 2 O 5 ) P fertilization. This finding has great agricultural and environmental implications.

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Plant growth-promoting activities of fluorescent pseudomonads, isolated from the Iranian soils

Cited by 55 publications

References 34 publications

Salinity tolerance of Dodonaea viscosa L. inoculated with plant growth-promoting rhizobacteria: assessed based on seed germination and seedling growth characteristics

Salinity tolerance of Dodonaea viscosa L. inoculated with plant growth-promoting rhizobacteria: assessed based on seed germination and seedling growth characteristics

Wheat (Triticum aestivum L.) growth enhancement by Azospirillum sp. under drought stress

Pseudomonas bacteria and phosphorous fertilization, affecting wheat (Triticum aestivum L.) yield and P uptake under greenhouse and field conditions

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