Actinobacterial Biofertilizers: An Alternative Strategy for Plant Growth Promotion

Rani, Kavita; Dahiya, Anupma; Masih, Jeniffer Christeena; Wati, Leela

doi:10.20546/ijcmas.2018.709.072

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…Fortunately, it can be significantly improved by adopting sustainable approaches such as using beneficial rhizobacteria (e.g., PSMs, nitrogen-fixing bacteria) as biofertilizers. Among PSMs, Actinobacteria are known to be eco-friendly and efficient plant growth promoters [24]. Therefore, the main objective of this study was to focus on Actinobacteria strains' abilities to dissolve mica and six different RPs.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, several interesting properties of these microorganisms have been evidenced such as the production of metabolites that improve plant growth and tolerance to biotic and abiotic stresses [17][18][19], which make them suitable candidates for the production of highly versatile biofertilizers [14,[20][21][22]. Unfortunately, until now Actinobacteria have been scarcely investigated compared to other plant growthpromoting rhizobacteria such as Proteobacteria and Firmicutes [23][24][25]. Consequently, the current study focused on the evaluation of the ability of Actinobacteria strains isolated from contrasting environment to solubilize RK and different RPs, as well as their ability to produce PGP-related compounds such as indole acetic acid (IAA), siderophore, HCN, and ammonia.…”

Section: Introductionmentioning

confidence: 99%

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The Screening of Potassium- and Phosphate-Solubilizing Actinobacteria and the Assessment of Their Ability to Promote Wheat Growth Parameters

et al. 2021

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Soil fertility and plant nutrition require an adequate management of essential macronutrients such as potassium (K) and phosphorus (P), which are mandatory for plant development. Bioleaching of K and P bearing minerals improves their chemical weathering and increases the performance of the biofertilization strategies. In this study, in vitro and greenhouse experiments were carried out to investigate P and K solubilization traits of nine Actinobacteria (P13, P14, P15, P16, P17, P18, BC3, BC10, and BC11) under fertilization with rock phosphate (RP). K and P solubilization were evaluated on Alexandrov and NBRIP media containing mica and six RP samples, respectively. The actinobacterial strains were able to solubilize K in Alexandrov medium supplemented with RP. However, when soluble P was used instead of RP, only four strains of Actinobacteria (Streptomyces alboviridis P18–Streptomyces griseorubens BC3–Streptomyces griseorubens BC10 and Nocardiopsis alba BC11) solubilized K. The solubilization values of K ranged from 2.6 to 41.45 mg/L while those of P varied from 0.1 to 32 mg/L. Moreover, all strains were able to produce IAA, siderophore, HCN, and ammonia and significantly improved the germination rate and the vigor index of wheat. The pot experiments revealed that four strains (Streptomyces alboviridis P18, Streptomyces griseorubens BC3, Streptomyces griseorubens BC10, and Nocardiopsis alba BC11) significantly improved the growth parameters of wheat, namely root length (1.75–23.84%), root volume (41.57–71.46%), root dry weight (46.89–162.41%), shoot length (8.92–23.56%), and shoot dry weight (2.56–65.68%) compared to the uninoculated control. These findings showed that Streptomyces griseorubens BC10 and Nocardiopsis alba BC11 are promising candidates for the implementation of efficient biofertilization strategies to improve soil fertility and plant yield under rock P and rock K fertilization.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Screening of Potassium- and Phosphate-Solubilizing Actinobacteria and the Assessment of Their Ability to Promote Wheat Growth Parameters

et al. 2021

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“…According to Berdy (2012), it is stated that about 10,000 antibiotics are produced by the actinomycetes group [26]. Furthermore, Mariastuti et al 2018 stated that the actinomycetes group produces bioactive compounds that act as antimicrobials and insecticides [27]. Actinomycetes can produce enzymes such as proteases, cellulases and chitinases [28].…”

Section: Resultsmentioning

confidence: 99%

“…Alternaria porri is the cause of purple spot disease on shallots which can cause yield losses in Indonesia reaching 50%-75% depending on the growing season [4]. A. porri attacks shallots and causes yield loss to crop failure when climatic conditions enter the rainy season [5]. This disease causes purplish spots surrounded by circular yellow spots, which can be found on shallots during tuber formation and can cause tuber failure [6].…”

Section: Introductionmentioning

confidence: 99%

Exploration of Indigenous Actinomycetes as Biocontrol Agents of Purple Blotch Diseases at Onion

Yanti,

Hamid,

Nurbailis

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Purple blotch disease caused by Alternaria porri is an essential disease in shallot plants. Actinomycetes microorganisms have potential as A. porri biological control agents because they produce bioactive compounds. The research aimed to select actinomycetes isolates that can suppress the growth of A. porri, stimulate growth, and increase the production of shallots. The study consisted of four stages: isolation, selection, characterization, and identification of potential actinomycetes isolates. The isolation results obtained 35 indigenous isolates, and as many as 16 isolates were successfully selected based on the results of the biosafety test. The antagonism test showed that 12 isolates produced suppression to A. porri by 4.87–63.77%. From 16 selected isolates, 13 isolates could produce chitinase enzymes with a chitinolytic index of 0.61-2.58. Nine selected isolates: AMSN23, AMSN10 AMBP7, AMSP10, AMSR21, AMTE2, AMDK6, AMTD 14, and AMPL24, could dissolve phosphate and produce Indole Acetic Acid (IAA) with a concentration of 34.82–85.98 ppm, but only six isolates were able to fix nitrogen. In the results of the 16S rRNA gene sequence, nine isolates were selected and potentially identified as Streptomyces rameus, S. lydicus, S. panaciradicis, S. seoulensis,S. fuscichromogenes, Streptomyces sp, S. nigrescens, S. viridaris, and S. griseus

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“…Actinobacteria have the potential to dissolve phosphate, produce siderophores, produce IAA (indole acetic acid), produce ammonia, and other lytic enzymes (Jog et al 2012). Actinobacteria can suppress the development of plant pathogens and are also known as plant growth-promoting rhizobacteria (PGPR) (Rani et al 2018). Actinobacteria can increase plant height, root length, dry weight, and photosynthetic pigments because they produce phytohormones (auxins, gibberellins, and cytokinins), siderophores, ammonia, dissolve phosphates and produce hydrogen cyanide (Chukwuneme et al 2020).…”

mentioning

confidence: 99%

Screening of indigenous actinobacteria as biological control agents of Colletotrichum capsici and increasing chili production

Yanti

Hamid

Reflin

et al. 2023

Egypt J Biol Pest Control

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Background Anthracnose disease caused by Colletotrichum capsici is a major disease in chili plants that is difficult to control. Actinobacteria have potential biological control agents for C. capsici because of their antifungal properties and dominant presence in soil. The study aimed to obtain actinobacteria isolates that have the potential to control anthracnose in planta and increase the growth and production of chili plants. The study consisted of three stages: isolation, selection, and characterization of the best actinobacteria isolates. A total of 20 isolates of indigenous actinobacteria were isolated, and 16 isolates were successfully selected based on the results of the biosafety test. Results The in planta test showed that eight isolates could control anthracnose with 100% effectiveness. Of the eight isolates, as many as five players increased the production of chili plants by 169.51–218.53 g. Actinobacterial isolates that have the potential to control anthracnose disease in planta and increase the growth and production of chili plants are ARAI 3221, ARAC 3221, ARAC 2211, ARAC 3321, and ARTI 1312. These isolates produced indole acetic acid (IAA) with concentrations of 25.82–88.87 ppm, and four isolates were able to dissolve phosphate. Five isolates produced chitinase enzyme with the chitinolytic index of 0.32–1.78. Conclusion The introduction of actinobacteria in chili plants was also proven to extend the incubation period, reduce the incidence of disease, and reduce the severity of anthracnose disease compared to negative controls and mancozeb. Actinobacteria can suppress pathogenic microorganisms that can inhibit plant growth. Actinobacteria have the potential to increase the growth and production of chili plants. The results of 16S rRNA sequences showed that the five potential isolates were identified as Streptomyces cellulose, S. fradiae, S. olivaceus, S. pseudogriseolus, and S. griseoflavus.

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Actinobacterial Biofertilizers: An Alternative Strategy for Plant Growth Promotion

Cited by 7 publications

References 26 publications

The Screening of Potassium- and Phosphate-Solubilizing Actinobacteria and the Assessment of Their Ability to Promote Wheat Growth Parameters

The Screening of Potassium- and Phosphate-Solubilizing Actinobacteria and the Assessment of Their Ability to Promote Wheat Growth Parameters

Exploration of Indigenous Actinomycetes as Biocontrol Agents of Purple Blotch Diseases at Onion

Screening of indigenous actinobacteria as biological control agents of Colletotrichum capsici and increasing chili production

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