<i>Trichoderma Harzianum</i>WKY1: an indole acetic acid producer for growth improvement and anthracnose disease control in sorghum

Saber, WesamEldin I. A.; Ghoneem, Khalid M.; Rashad, Younes M.; Al-Askar, Abdulaziz A.

doi:10.1080/09583157.2017.1321733

Cited by 55 publications

(40 citation statements)

References 33 publications

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“…Accordingly, root growth inhibition in response to severe P limitation was recorded also in the present study (Figures 2 and 3), and both, the production of auxin and ACC deaminase have been reported for the Bacillus strain FZB42, which was used as an inoculant [32,33]. Similarly, auxin production and root growth stimulation is documented for Trichoderma harzianum [34].…”

Section: Alkaline Soilsupporting

confidence: 83%

Soil Type-Dependent Interactions of P-Solubilizing Microorganisms with Organic and Inorganic Fertilizers Mediate Plant Growth Promotion in Tomato

et al. 2018

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The use of plant growth-promoting microorganisms (PGPMs) as bio-effectors (BEs) to improve the nutrient acquisition of crops has a long history. However, limited reproducibility of the expected effects still remains a major challenge for practical applications. Based on the hypothesis that the expression of PGPM effects depends on soil type and the properties of the applied fertilizers, in this study, the performance of selected microbial inoculants was investigated for two contrasting low-fertility soils supplied with different organic and inorganic fertilizers. Greenhouse experiments were conducted with tomato on an alkaline sandy loam of pH 7.8 and an acidic loamy sand of pH 5.6 with limited phosphate (P) availability. Municipal waste compost, with and without poultry manure (PM), rock phosphate (RP), stabilized ammonium, and mineral nitrogen, phosphorus and potassium (NPK) fertilization were tested as fertilizer variants. Selected strains of Bacillus amyloliquefaciens (Priest et al. 1987) Borriss et al. 2011 and Trichoderma harzianum Rifai (OMG16) with proven plant growth-promoting potential were used as inoculants. On both soils, P was identified as a major limiting nutrient. Microbial inoculation selectively increased the P utilization in the PM-compost variants by 116% and 56% on the alkaline and acidic soil, while RP utilization was increased by 24%. This was associated with significantly increased shoot biomass production by 37-42%. Plant growth promotion coincided with a corresponding stimulation of root growth, suggesting improved spatial acquisition of soluble soil P fractions, associated also with improved acquisition of nitrogen (N), potassium (K), magnesium (Mg), and calcium (Ca). There was no indication for mobilization of sparingly soluble Ca phosphates via rhizosphere acidification on the alkaline soil, and only mineral NPK fertilization reached a sufficient P status and maximum biomass production. However, on the moderately acidic soil, FZB42 significantly stimulated plant growth of the variants supplied with Ca-P in the form of RP + stabilized ammonium and PM compost, which was equivalent to NPK fertilization; however, the P nutritional status was sufficient only in the RP and NPK variants. The results suggest that successful application of microbial biofertilizers requires more targeted application strategies, considering the soil properties and compatible fertilizer combinations.

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Section: Alkaline Soilsupporting

confidence: 83%

Soil Type-Dependent Interactions of P-Solubilizing Microorganisms with Organic and Inorganic Fertilizers Mediate Plant Growth Promotion in Tomato

et al. 2018

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“…Tryptophan is the main precursor for IAA synthesis and its presence increases the IAA production which in turn, enhances the availability of substrate for plants [50]. IAA biosynthesis of fungal species occurred near the end of the growth phase or during plant dormancy phase, so the process is quite long [50]. According to our qualitative and quantitative tests, only T. asperellum showed capacity to produce IAA ( Figure 3 and Table 2).…”

Section: Discussionmentioning

confidence: 89%

“…Fungi are able to use secreted IAA for interaction with plants in pathogenesis or symbiotic strategies, supporting the defense mechanism of plants [47][48][49][50][51][52]. Tryptophan is the main precursor for IAA synthesis and its presence increases the IAA production which in turn, enhances the availability of substrate for plants [50]. IAA biosynthesis of fungal species occurred near the end of the growth phase or during plant dormancy phase, so the process is quite long [50].…”

Section: Discussionmentioning

confidence: 99%

Applications of Fungal Strains with Keratin-Degrading and Plant Growth Promoting Characteristics

et al. 2019

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Protein hydrolysates (PHs) are organic non-microbial biostimulants having beneficial effects on plants. The study was designed to assess the effects on plants by the applications of PHs obtained from Trichoderma isolates grown on keratin wastes. Trichoderma isolates were characterized for indole-3-acetic acid and siderophores production, activity of lytic enzymes, phosphorous solubilization and inhibition of pathogens growth, using qualitative specific tests. Fungal isolates were cultured on a medium with keratin wastes (wool and feathers) to obtain PHs. Fungal PHs were tested in vivo for plant biostimulant action, as follows: (i) seeds germination test; (ii) activation of plant proton pump; (iii) evaluation of effect on tomato seedling growth. PHs from T. asperellum cultured on feathers medium reached the highest values for all parameters recorded (plant height and diameter, number of leaves and branches), with the exception of those for plant biomass, which were maximum for the wool medium. The metabolites released by keratin degradation under the activity of selected T. asperellum isolate improved crop health and productivity. The use of PHs can be a reasonable solution for the environmental pollution of by-products from the food chain, as well as for the replacement of chemical fertilizers with microbial formulations to stimulate plant growth.

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“…Beneficial effects of Trichoderma spp. on plant development are reported in rice [76], melon [69], sorghum [70], and wheat [71,72]. In soybean crop, growth promotion is related to the synthesis of 1-aminocyclopropane-1-carboxylate deaminase, indole acetic acid (IAA), siderophores, and biological nitrogen fixation [73,74].…”

Section: Sanity Of Soybean Seeds Treated With Trichoderma Sppmentioning

confidence: 99%

“…Some examples include R. solani [84], F. oxysporum f. sp. melonis [69], Puccinia triticina [85], C. sublineolum [70], and P. graminis [85]. Though plant-pathogen-Trichoderma interactions have been extensively studied even at the molecular level [86][87][88], most of the research are conducted under laboratory or greenhouse conditions.…”

Section: In Vivo Biocontrol Of S Sclerotiorum and Biological Controlmentioning

confidence: 99%

Trichodermaas a Biocontrol Agent againstSclerotiniaStem Rot or White Mold on Soybeans in Brazil: Usage and Technology

Juliatti¹,

Rezende²,

Juliatti³

et al. 2019

Trichoderma - The Most Widely Used Fungicide

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Biological control agents are alternatives to chemical pesticides in the management of plant diseases. Currently, hundreds of bioproducts are commercially available in international market varying mainly in antagonistic microorganisms and formulation. We screened four Trichoderma-based products as to their efficacy in controlling Sclerotinia stem rot (SSR) under protected and field environments and their effect on soybean seeds' sanity and physiological qualities. We also tested application technologies through seed microbiolization and foliar spraying to deliver the microorganisms, and their compatibility with chemical fungicides. In vitro assays showed that all Trichoderma strains were antagonistic to S. sclerotiorum evidencing hyperparasitic activity. Moreover, the bioproducts reduced fungi incidence on soybean seeds, promoted faster seedling emergence and did not hamper seeds' vigor. Increases of 14 and 37% were registered for root length and shoot fresh weight over that of the untreated control indicating potential application of the bioproducts as soybean growth promoters. Thiophanate-methyl and procymidone were the most compatible, without drastically affecting spore germination or mycelium growth. Under field conditions, all Trichoderma strains reduced SSR incidence and increased soybean grain yield. Formulation interferes on bioproducts' viability and efficacy deserving special attention upon development.

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Trichoderma HarzianumWKY1: an indole acetic acid producer for growth improvement and anthracnose disease control in sorghum

Cited by 55 publications

References 33 publications

Soil Type-Dependent Interactions of P-Solubilizing Microorganisms with Organic and Inorganic Fertilizers Mediate Plant Growth Promotion in Tomato

Soil Type-Dependent Interactions of P-Solubilizing Microorganisms with Organic and Inorganic Fertilizers Mediate Plant Growth Promotion in Tomato

Applications of Fungal Strains with Keratin-Degrading and Plant Growth Promoting Characteristics

Trichodermaas a Biocontrol Agent againstSclerotiniaStem Rot or White Mold on Soybeans in Brazil: Usage and Technology

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