Screening of plant growth-promoting endophytic bacteria from the roots of the medicinal plant Aloe vera

Silva, C.F.; Vitorino, Luciana Cristina; Mendonça, Maria Andréia Corrěa; Araújo, Welington Luiz; Dourado, Manuella Nóbrega; Albuquerque, Leonardo Cunha de; Soares, Marcos Antônio; Souchie, Edson Luiz

doi:10.1016/j.sajb.2019.09.019

Cited by 23 publications

(21 citation statements)

References 115 publications

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“…are the most predominant endophytic effective species against plant pathogenic fungi, consistent with many published studies [ 60 , 61 , 62 ]. This is attributed to the potential of these species to produce diverse active metabolites and different lytic enzymes, such as amylase, protease, and chitinase, which attack the fungal cell wall [ 62 , 63 ]. According to the obtained results, we can conclude that the endophytic strains Bacillus cereus PI-8 and Bacillus subtilis PI-10 exhibited the highest activities, and therefore it could be used as bioinoculants and to examine their effects on Zea maize root growth.…”

Section: Discussionsupporting

confidence: 89%

Plant Growth-Promoting Endophytic Bacterial Community Inhabiting the Leaves of Pulicaria incisa (Lam.) DC Inherent to Arid Regions

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et al. 2021

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102

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In this study, 15 bacterial endophytes linked with the leaves of the native medicinal plant Pulicaria incisa were isolated and identified as Agrobacterium fabrum, Acinetobacter radioresistant, Brevibacillus brevis, Bacillus cereus, Bacillus subtilis, Paenibacillus barengoltzii, and Burkholderia cepacia. These isolates exhibited variant tolerances to salt stress and showed high efficacy in indole-3-acetic acid (IAA) production in the absence/presence of tryptophan. The maximum productivity of IAA was recorded for B. cereus BI-8 and B. subtilis BI-10 with values of 117 ± 6 and 108 ± 4.6 μg mL−1, respectively, in the presence of 5 mg mL−1 tryptophan after 10 days. These two isolates had a high potential in phosphate solubilization and ammonia production, and they showed enzymatic activities for amylase, protease, xylanase, cellulase, chitinase, and catalase. In vitro antagonistic investigation showed their high efficacy against the three phytopathogens Fusarium oxysporum, Alternaria alternata, and Pythium ultimum, with inhibition percentages ranging from 20% ± 0.2% to 52.6% ± 0.2% (p ≤ 0.05). Therefore, these two endophytic bacteria were used as bio-inoculants for maize seeds, and the results showed that bacterial inoculations significantly increased the root length as well as the fresh and dry weights of the roots compared to the control plants. The Zea mays plant inoculated with the two endophytic strains BI-8 and BI-10 significantly improved (p ≤ 0.05) the growth performance as well as the nutrient uptake compared with an un-inoculated plant.

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Section: Discussionsupporting

confidence: 89%

Plant Growth-Promoting Endophytic Bacterial Community Inhabiting the Leaves of Pulicaria incisa (Lam.) DC Inherent to Arid Regions

Fouda

Eid

Elsaied

et al. 2021

Plants

102

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“…The isolates belonged to 15 genera and 32 species, mainly belonging to Proteobacteria and Firmicutes. These results con rmed rich endophytic pool in medicinal plants, in agreement with the previous studies (Elmagzob et al 2019;Silva et al 2019;Abdelshafy Mohamad et al 2020). The predominant reported genera were Pseudomonas and Bacillus.…”

Section: Discussionsupporting

confidence: 92%

“…Despite the great interest in plants used for the purpose of traditional medicine, little is known about the symbiotic associations of these plants with endophytic microorganisms (Silva et al 2019). The present study is the rst of its kind to evaluate the multifunctional potential of bacterial strains isolated from the roots of R. o cinalis native to the North-Western Himalayan region of Himachal Pradesh, India.…”

Section: Discussionmentioning

confidence: 99%

“…These microorganisms are natural inhabitants of host plant and can also develop in an endogenous fashion. This is true for endophytic microorganisms, which colonize plant tissues for at least a part of their life-cycle without any visible disease symptoms (Silva et al 2019). Bacteria of endophyte community are diverse and able to disperse throughout plant tissues systemically (Bacon and White 2016).…”

Section: Introductionmentioning

confidence: 99%

“…xation, phosphate solubilization, production of ammonia, siderophores, phytohormones and hydrolytic enzymes (Silva et al 2019). These effects provide for the need of plant nutrition in a sustainable manner, thereby reducing the use of chemical fertilizers and pesticides.…”

Section: Introductionmentioning

confidence: 99%

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Bioprospecting Beneficial Endophytic Bacterial Communities Associated With Rosmarinus Officinalis for Alleviating Plant Productivity

Sharma

Sood

Chauhan

2021

Preprint

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The present study was aimed to isolate and identify root endophytic bacteria with multifunctional plant growth promoting (PGP) traits from medicinal plant Rosemarinus officinalis grown in the North-Western Himalayas. A total of 42 strains were isolated, exhibiting variable degrees of PGP traits, including P-solubilization (10-375 µg/ml), IAA (6-66 µg/ml), siderophore (32.37-301.48 %SU) production and antifungal activity in terms of percent growth inhibition (%GI) against Fusarium oxysporum (44.44-77.77 %GI), Fusarium graminiarum (48.88-71.42 %GI) and Rhizoctonia solani (44.44-77.7 %GI). 16S rDNA sequencing results showed lineage of these strains to 15 genera viz., Aneurinibacillus, Bacillus, Beijerinckia, Cedecea, Ensifer, Enterobacter, Kosakonia, Lactobacillus, Lysobacter, Oxynema, Pseudomonas, Pantoea, Paenibacillus, Pseudoxanthomonas and Serratia. The effect of 11 potential strains was selected for in vivo growth studies of R. officinalis. The results showed that the inoculation of Bacillus subtilis KU21, Pseudomonas aeruginosa SI12, and Cedecea lapagei KU14 significantly increased the physical growth parameters of plant over uninoculated control viz., number of lateral of branches (43.95-46.39 %), stem height (29.04-38.57 %), root length (32.31-37.14 %), shoot (34.76-40.91 %) and root biomass (62.89-70.70 %). Physiological characteristics such as total chlorophyll (30.41-30.96 %), phenol (14.43-24.55 %) and carotenoids (34.26-39.87 %) content, also showed a relative increase as compared to uninoculated control; furthermore, the macronutrients (NPK) contents of the plant as well as soil also showed an increase. The developed module may be recommended for sustainable production of R. officinalis in the North-Western Himalayan region without hampering the soil health and fertility.

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Role of Endophytic Bacteria in the Alleviation of Heavy Metals from an Ecosystem

Prasher

Sharma

2021

Plant Growth-Promoting Microbes for Sustainable Biotic and Abiotic Stress Management

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Screening of plant growth-promoting endophytic bacteria from the roots of the medicinal plant Aloe vera

Cited by 23 publications

References 115 publications

Plant Growth-Promoting Endophytic Bacterial Community Inhabiting the Leaves of Pulicaria incisa (Lam.) DC Inherent to Arid Regions

Plant Growth-Promoting Endophytic Bacterial Community Inhabiting the Leaves of Pulicaria incisa (Lam.) DC Inherent to Arid Regions

Bioprospecting Beneficial Endophytic Bacterial Communities Associated With Rosmarinus Officinalis for Alleviating Plant Productivity

Role of Endophytic Bacteria in the Alleviation of Heavy Metals from an Ecosystem

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