Indole-3-acetic acid (IAA) producing Pseudomonas isolates inhibit seed germination and α-amylase activity in durum wheat (Triticum turgidum L.)

Tabatabaei, Sayed Gholam Hassan; Ehsanzadeh, Parviz; Etesami, Hassan; Alikhani, Hossein Ali; Glick, Bernard R.

doi:10.5424/sjar/2016141-8859

Cited by 38 publications

(30 citation statements)

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“…The results showed that the supernatant of eight isolates from H. perforatum inhibited seed germination and seedling growth of tomato. Similarly, Tabatabaei et al (2016) observed an inhibition of seed germination and seedling growth of durum wheat by Pseudomonas sp. UW3, P. fluorescent 550, and Pseudomonas sp.…”

Section: Discussionmentioning

confidence: 86%

Medicinal plants with phytotoxic activity harbour endophytic bacteria with plant growth inhibitory properties

Shurigin

Davranov

Wirth

et al. 2018

Environmental Sustainability

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The cultivable endophytic bacteria associated with two medicinal plants Hypericum perforatum L. and Ziziphora capitata L. contrasting with phytotoxic activity were investigated. The phytotoxic activity of plant extracts, and bacterial metabolites on seed germination and seedling growth of tomato were evaluated. In comparison to Z. capitata, the extract of H. perforatum contains a higher content of phenolic compounds. The crude extract of H. perforatum inhibited germination of seeds and seedling growth of tomato, whereas Z. capitata extracts only slightly reduced these parameters. Interestingly, almost half of the endophytes associated with H. perforatum had an inhibitory effect on plant growth, whereas rarely any plant inhibitory effect was found among isolates from Z. capitata. All bacterial isolates from Z. capitata were able to stimulate plant growth, by 35-80%. In contrast, only five isolates from H. perforatum caused significant improvement in plant growth (22-46%). The results showed that medicinal plants with higher phytotoxic activity were colonized with endophytic bacteria which inhibit plant growth and development. These findings indicate that plant phytochemical constituents and activity determine the physiological properties of their endophytes.

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Section: Discussionmentioning

confidence: 86%

Medicinal plants with phytotoxic activity harbour endophytic bacteria with plant growth inhibitory properties

Shurigin

Davranov

Wirth

et al. 2018

Environmental Sustainability

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“…The IAA seems to play a double role according to its concentration (Chauan et al, 2009). High concentrations of IAA secreted by bacteria inhibit the germination of weed seeds (Tabatabaei et al, 2016), and are also produced by most plant growth-promoting bacteria (PGPB), being considered one of the most effective mechanisms already elucidated (Lin et al, 2012). At high concentrations, the IAA can also reduce plant root growth by its relationship with ethylene synthesis.…”

Section: Resultsmentioning

confidence: 99%

Selection of rhizobacteria for pre-emergence control of wild poinsettia, horseweed and sourgrass

Oliveira¹,

Vieira²,

Espíndola³

et al. 2019

Científica

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This study aimed to select rhizobacteria isolates for pre-emergence control of three glyphosate-resistant species: horseweed (Conyza sumatrensis), sourgrass (Digitaria insularis), and wild poinsettia (Euphorbia heterophylla). Nineteen strains of Bacillus spp. and thirty-four strains of Pseudomonas spp. were isolated from soil samples from the states of Minas Gerais, São Paulo, Paraná, and Santa Catarina. These strains were evaluated in vitro and under greenhouse conditions for inhibition of seed germination and growth of target weeds. Several strains of Bacillus spp. and Pseudomonas spp. inhibited the germination and radicle growth of the three target species in Petri dishes containing agar-water medium with the respective bacterial isolates, separately. However, Bacillus spp. strains A1B1, A1B3, A1B4, A2B2, A2B3, A10B1, A10B5, A11B1, and A13B3 were the only ones to inhibit germination of horseweed seeds in greenhouse soil. The soil methodology (greenhouse) was more effective in the selection of strains than the in vitro methodology for not overestimating the bacterium-host interaction and for simulating better field conditions. Promising Bacillus spp. strains must be identified at the species level and characterized for metabolite production, plant growth regulation, root colonization, and effect on cultivated plants.

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“…An increase was quantified in all the growth parameters of the ancho-type pepper plants inoculated with marine bacteria and yeasts. This marine microorganism's capacity to increase plant growth is related to different mechanisms, among which hormone production is important (of hormones such as indole ascetic acid (IAA) and gibberellins [51]), as well as phosphate solubilization [52] and atmospheric nitrogen fixation to soil [53], among others. With respect to the bacteria, several studies have reported the capacity of S. rhizophila to promote plant growth in cucumber [54], soy [55], and basil [29], as well as the different Bacillus species effects on the growth of tomato [56], wheat [57], and banana [58].…”

Section: Discussionmentioning

confidence: 99%

Efficiency of Marine Bacteria and Yeasts on the Biocontrol Activity of Pythium ultimum in Ancho-Type Pepper Seedlings

et al. 2020

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Ancho-type pepper (Capsicum annuum L.) is a crop susceptible to Pythium ultimum, which has already been controlled with synthetic fungicide applications; however, marine antagonist microorganisms could be an alternative source of control. The efficiency in vitro and in vivo of marine bacteria and yeasts was determined against P. ultimum. The inhibition of the radial growth of P. ultimum was quantified in vitro by the bacteria Stenotrophomonas rhizophila KM01 and KM02; Bacillus subtilis RBM01 and RBM02, B. amyloliquefaciens 2RLBF and 3R4CF; and Pseudomonas spp. 2R6BF and 2RE9CF, as well as the yeasts Debaryomyces hansenii 1R11AB, 1R11CB, and LL01 and Cryptococcus laurentii 2R3BF and 2R1CB. The β-1,3-glucanase activity of the marine microorganisms was quantified in the presence of the phytopathogen. The disease index (DI), growth parameters, and colony forming units (CFU) were determined in ancho-type pepper plants inoculated with marine bacteria, yeasts, and P. ultimum. The radial zone of the phytopathogen was inhibited by 80% and 75% by S. rhizophila KM01 and C. laurentii 2R1CB, respectively. D. hansenii LL01 and S. rhizophila KM02 showed the highest activity of β-1,3-glucanase, with 6060 U/mL and 47 U/mL, respectively. B. subtilis RBM02 protected 100% of the plants from the oomycete, and an increase was quantified in all the growth parameters and CFU. The use of these marine bacteria and yeasts are, therefore, an option for P. ultimum biocontrol in ancho-type pepper plants, thereby minimizing the application of synthetic fungicides.Agronomy 2020, 10, 408 2 of 12 by immediate infection makes management of this phytopathogen very difficult [7]. Several Pythium species, including P. aphanidermatum, P. irregular, and P. ultimum, are known to cause damping-off and root rot diseases in pepper [8][9][10]. Although synthetic fungicides have shown promising results in controlling damping-off disease, phytotoxicity and fungicide residues pose serious problems to human and animal health, as well as the environment. In this context, phytosanitary measures and the management of pepper cultivation should include the application of microorganisms as biocontrol agents to minimize the use of synthetic fungicides [11].Bacteria and yeasts have a high capacity to control phytopathogens without causing damage to human and animal health and the environment [12,13]. Several mechanisms have been proposed for the biocontrol of phytopathogens by bacteria and yeasts, including competition for space and nutrients [14,15], lytic enzyme production such as β-1,3-glucanase [16,17], and induction of host resistance [18,19], among others. Both microorganisms have been isolated in different terrestrial ecosystems, mainly in plants, fruits, and soils; the main bacteria used as biocontrol agents are species of Stenotrophomonas, Bacillus, and Pseudomonas, which have already been reported for the control of Fusarium proliferatum in melon [20]; Sclerotium rolfsii [21] and Rhizoctonia solani in wheat [22]; and F. solani in cassava [23], among others. O...

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Indole-3-acetic acid (IAA) producing Pseudomonas isolates inhibit seed germination and α-amylase activity in durum wheat (Triticum turgidum L.)

Cited by 38 publications

References 35 publications

Medicinal plants with phytotoxic activity harbour endophytic bacteria with plant growth inhibitory properties

Medicinal plants with phytotoxic activity harbour endophytic bacteria with plant growth inhibitory properties

Selection of rhizobacteria for pre-emergence control of wild poinsettia, horseweed and sourgrass

Efficiency of Marine Bacteria and Yeasts on the Biocontrol Activity of Pythium ultimum in Ancho-Type Pepper Seedlings

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