Streptomyces sp. S-9 promotes plant growth and confers resistance in Pigeon pea (Cajanus cajan) against Fusarium wilt

Dave, Anand; Ingle, Sanjay

doi:10.1007/s13205-021-02989-0

Cited by 5 publications

(3 citation statements)

References 60 publications

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“…In addition, tomato plants treated with Metarhizium species had a thicker root epidermis and improved xylem tissue compared to control treatments. Dave and Ingle [54] demonstrated the PGPR Streptomyces-9-mediated increase in the thickness of epidermis of pigeon pea roots and xylem tissue. The effectiveness of M. pinghaense (AAUBC-M26) was tested in a pot culture experiment to help tomato plants cope with salt stress.…”

Section: Discussionmentioning

confidence: 99%

Plant Growth-Promoting Potential of Entomopathogenic Fungus Metarhizium pinghaense AAUBC-M26 under Elevated Salt Stress in Tomato

et al. 2023

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Entomopathogenic fungi Metarhizium species are generally employed to manage the soil-dwelling stage of insect pests, and are known for their rhizocompetency property. Since this fungus is typically recommended for use in soil, it could potentially be investigated as a bioinoculant to reduce abiotic stress, such as salinity, along with improved plant growth promotion. Salt stress tolerance potential of native Metarhizium isolates was evaluated based on mycelial fresh weight, dry weight, and spore yield. All the isolates were found to tolerate NaCl concentrations (50 mM, 100 mM, 150 mM, 200 mM, 250 mM, and 300 mM) supplemented in the culture medium. Metarhizium anisopliae (AAUBC-M15) and Metarhizium pinghaense (AAUBC-M26) were found to be effective at tolerating NaCl stress up to 200 mM NaCl. These two isolates were analyzed in vitro for plant growth-promoting traits at elevated salt concentrations (100 and 200 mM NaCl). No significant effect on IAA production was reported with the isolate M. pinghaense (AAUBC-M26) (39.16 µg/mL) or in combination with isolate M. anisopliae (AAUBC-M15) (40.17 µg/mL) at 100 mM NaCl (38.55 µg/mL). The salinity stress of 100 mM and 200 mM NaCl had a significant influence on the phosphate solubilization activity, except in the co-inoculation treatment at 100 mM NaCl. The isolates were positive for ACC deaminase enzyme activity. An increase in salt concentration was accompanied by a steady and significant increase in chitinase enzyme activity. Total phenolics (149.3 µg/mL) and flavonoids (79.20 µg/mL) were significantly higher in the culture filtrate of Metarhizium isolates at 100 mM NaCl, and gradual decline was documented at 200 mM NaCl. M. pinghaense (AAUBC-M26) proved to be promising in reducing the salt stress in tomato seedlings during the nursery stage. In the pot culture experiment, the treatment comprising soil application + seedling root dip + foliar spray resulted in improved growth parameters of the tomato plant under salt stress. This study shows that Metarhizium, a fungus well known for controlling biotic stress brought on by insect pests, can also help plants cope with abiotic stress, such as salinity.

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Section: Discussionmentioning

confidence: 99%

Plant Growth-Promoting Potential of Entomopathogenic Fungus Metarhizium pinghaense AAUBC-M26 under Elevated Salt Stress in Tomato

et al. 2023

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“…Streptomyces sp. S-9, as a plant growth promoter, increased proline contents of Fusarium (Dave and Ingle 2021).…”

Section: Discussionmentioning

confidence: 95%

Enterobacter cloacae Induces SA-Dependent Systemic Acquired Resistance of Zea mays Against Fusarium oxysporum

Sallam,

Haroun,

Aboulnaga

et al. 2024

J Plant Growth Regul

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Plant Growth Promoting Bacteria have proven themselves in agricultural applications not only as biofertilizers but also as biocontrol agents against different phytopathogens. In this study, we focused on investigating the ability of Enterobacter cloacae to induce the immune response of Zea mays against Fusarium oxysporum infection. The bacterium was transformed with a plasmid to express Green Fluorescence Protein and used in a greenhouse experiment in combination with Fusarium infection in different treatments. E. cloacae successfully colonized the root, resulting in enhanced physical growth with great investment in leaf area, photosynthetic pigment production, and reduced anthocyanin content. E. cloacae left a considerable resistance to root rot caused by Fusarium, as the disease severity was reduced from 74.2% (in the case of Fusarium infection alone) to about 35.8% (in the case of E. cloacae addition 14 days before fungal infection). The amount of salicylic acid (SA) was markedly elevated, and Pathogen-Related Protein showed up to an eightfold increase in the expression level. From these results, we suppose that E. cloacae induces SA-dependent systemic acquired resistance, which allows pre-colonized plants to resist Fusarium infection.

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“…This is achieved by diminishing the availability of ferric ions in the rhizosphere, effectively inhibiting the growth and virulence of soil borne plant pathogens. An illustrative example of this phenomenon is seen in P. aeruginosa, which, when capable of producing siderophores under laboratory conditions, exhibits a broad spectrum of antagonistic effects against pathogens like F. ciceri and F. udum 55,56 . Similarly, research has indicated that strains of B. atrophaeus and B. subtilis, proficient in siderophore production, can effectively suppress the growth of wilt disease causing pathogens in crops such as cotton (Fusarium oxysporum) 57 and pepper 58 both under in vitro and in vivo conditions.…”

Section: Discussionmentioning

confidence: 99%

Harnessing the power of native biocontrol agents against wilt disease of Pigeonpea incited by Fusarium udum

Reddy,

Kumar,

Sahni

et al. 2024

Sci Rep

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Fusarium wilt, caused by (Fusarium udum Butler), is a significant threat to pigeonpea crops worldwide, leading to substantial yield losses. Traditional approaches like fungicides and resistant cultivars are not practical due to the persistent and evolving nature of the pathogen. Therefore, native biocontrol agents are considered to be more sustainable solution, as they adapt well to local soil and climatic conditions. In this study, five isolates of F. udum infecting pigeonpea were isolated from various cultivars and characterized morphologically and molecularly. The isolate from the ICP 8858 cultivar displayed the highest virulence of 90%. Besides, 100 endophytic bacteria, 100 rhizosphere bacteria and three Trichoderma spp. were isolated and tested against F. udum isolated from ICP 8858 under in vitro conditions. Out of the 200 bacteria tested, nine showed highest inhibition, including Rb-4 (Bacillus sp.), Rb-11 (B. subtilis), Rb-14 (B. megaterium), Rb-18 (B. subtilis), Rb-19 (B. velezensis), Eb-8 (Bacillus sp.), Eb-11 (B. subtilis), Eb-13 (P. aeruginosa), and Eb-21 (P. aeruginosa). Similarly, Trichoderma spp. were identified as T. harzianum, T. asperellum and Trichoderma sp. Notably, Rb-18 (B. subtilis) and Eb-21 (P. aeruginosa) exhibited promising characteristics such as the production of hydrogen cyanide (HCN), cellulase, siderophores, ammonia and nutrient solubilization. Furthermore, treating pigeonpea seedlings with these beneficial microorganisms led to increased levels of key enzymes (POD, PPO, and PAL) associated with resistance to Fusarium wilt, compared to untreated controls. In field trials conducted for four seasons, the application of these potential biocontrol agents as seed treatments on the susceptible ICP2376 cultivar led to the lowest disease incidence. Specifically, treatments T2 (33.33) (P. aeruginosa) and T3 (35.41) (T. harzianium) exhibited the lowest disease incidence, followed by T6 (36.5) (Carbendizim), T1 (36.66) (B. subtilis), T4 (52.91) (T. asperellum) and T5 (53.33) (Trichoderma sp.). Results of this study revealed that, P. aeruginosa (Eb-21), B. subtilis (Rb-18) and T. harzianum can be used for plant growth promotion and management of Fusarium wilt of pigeonpea.

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Streptomyces sp. S-9 promotes plant growth and confers resistance in Pigeon pea (Cajanus cajan) against Fusarium wilt

Cited by 5 publications

References 60 publications

Plant Growth-Promoting Potential of Entomopathogenic Fungus Metarhizium pinghaense AAUBC-M26 under Elevated Salt Stress in Tomato

Plant Growth-Promoting Potential of Entomopathogenic Fungus Metarhizium pinghaense AAUBC-M26 under Elevated Salt Stress in Tomato

Enterobacter cloacae Induces SA-Dependent Systemic Acquired Resistance of Zea mays Against Fusarium oxysporum

Harnessing the power of native biocontrol agents against wilt disease of Pigeonpea incited by Fusarium udum

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