Isolation and Screening for Multi-trait Plant Growth Promoting Actinobacteria From Organic Sugarcane Rhizosphere

Rodrigues, Ariana Alves; Araújo, Marcus Vinícius Forzani; Soares, MRenan De Souza; Oliveira, Bruno Francesco Rodrigues de; Sibov, Sérgio Tadeu; Vieira, José Daniel Gonçalves

doi:10.9735/0975-5276.10.5.1193-1198

Cited by 5 publications

(7 citation statements)

References 80 publications

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“…MNC-3 with 8.30 µg/mL and 6.70 µg/mL, respectively. These results agree with those reported by Anwar et al [76] and Rodrigues et al [31]. Several Streptomyces species, such as Streptomyces olivaceoviridis, Streptomyces rimosus, Streptomyces rochei, Streptomyces griseoviridis, and Streptomyces lydi also have the ability to produce IAA and promote plant growth [80][81][82].…”

Section: Pgp Potentials Of Extremophilic Actinobacteriasupporting

confidence: 92%

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Actinobacteria from Extreme Niches in Morocco and Their Plant Growth-Promoting Potentials

et al. 2019

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The objectives of this study were to assess actinobacterial diversity in five Moroccan extreme habitats and to evaluate their plant growth-promoting (PGP) activities. The soil samples were collected from different locations, including soils contaminated with heavy metals, from a high altitude site, from the desert, and from a marine environment. In total, 23 actinobacteria were isolated, 8 from Merzouga sand soil; 5 from Cannabis sativa rhizospheric soil; 5 from Toubkal mountain; 4 from a Draa sfar mining site; and 1 from marine soil. Based on their genotypic classification using 16S rRNA gene sequences, 19 of all belonged to the genus Streptomyces (82%) while the rest are the members of the genera Nocardioides (4.5%), Saccharomonospora (4.5%), Actinomadura (4.5%), and Prauserella (4.5%). Isolates Streptomyces sp. TNC-1 and Streptomyces sp. MNC-1 showed the highest level of phosphorus solubilization activity with 12.39 and 8.56 mg/mL, respectively. All 23 isolates were able to solubilize potassium, and 91% of them could grow under nitrogen-free conditions. The ability of the isolated actinobacteria to form indole-3-acetic acid (IAA) ranged from 6.70 to 75.54 μg/mL with Streptomyces sp. MNC-1 being the best IAA producer. In addition, all of the actinobacteria could produce siderophores, with Saccharomonospora sp. LNS-1 synthesizing the greatest amount (138.92 μg/mL). Principal coordinate analysis revealed that Streptomyces spp. MNC-1, MNT-1, MNB-2, and KNC-5; Saccharomonospora sp. LNS-1; and Nocardioides sp. KNC-3 each showed a variety of high-level plant growth-promoting activities. The extreme environments in Morocco are rich with bioactive actinobacteria that possess a variety of plant growth-promoting potentials that can further benefit green and sustainable agriculture.

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Section: Pgp Potentials Of Extremophilic Actinobacteriasupporting

confidence: 92%

“…The Salkowski's reagent (10 mM FeCl 3 , 35% perchloric acid) and 2 drops of phosphoric acid were added to 1 mL of the bacterial supernatant. The test solution was subsequently incubated for 30 min in the dark before its absorbance was measured at 530 nm [31]. Sterile LB medium served as a blank.…”

Section: Iaa Productionmentioning

confidence: 99%

Actinobacteria from Extreme Niches in Morocco and Their Plant Growth-Promoting Potentials

et al. 2019

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“…After 30 min of incubation, the appearance of the color pink was an indicator of a positive production of IAA. The absorbance was read at 530 nm [32]. The level of IAA production was calculated based on the calibration curve of IAA and the results were expressed as µg of IAA per mL of the extract.…”

Section: Dual Solubilization Of Potassium and Phosphatementioning

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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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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“…In contrast, the lowest relative abundance of Actinobacteria was in FL, where SOC was the highest. Actinobacteria decreased mineralization rates in some soils, which enhanced SOC accumulation [ 55 , 56 , 57 ]. Moreover, as Acidobacteria prefer low-nutrient soils, their presence indicates soil degradation [ 58 , 59 ].…”

Section: Discussionmentioning

confidence: 99%

Land-Use Driven Changes in Soil Microbial Community Composition and Soil Fertility in the Dry-Hot Valley Region of Southwestern China

Liu

Chen

et al. 2022

Microorganisms

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The Dry-Hot Valley is a unique geographical region in southwestern China, where steep-slope cultivation and accelerating changes in land-use have resulted in land degradation and have aggravated soil erosion, with profound impacts on soil fertility. Soil microbes play a key role in soil fertility, but the impact of land-use changes on soil microbes in the Dry-Hot Valley is not well known. Here, we compared characteristics and drivers of soil microbial community composition and soil fertility in typical Dry-Hot Valley land uses of sugarcane land (SL), forest land (FL), barren land (BL) converted from former maize land (ML), and ML control. Our results showed that BL and SL had reduced soil organic carbon (SOC), total nitrogen (TN), and total potassium (TK) compared to ML and FL. This indicated that conversion of ML to SL and abandonment of ML had the potential to decrease soil fertility. We also found that fungal phyla Zoopagomycota and Blastocladiomycota were absent in SL and BL, respectively, indicating that land-use change from ML to SL decreased the diversity of the bacterial community. Redundancy analysis indicated that the relative abundance of bacterial phyla was positively correlated with TN, SOC, and available potassium (AK) content, and that fungal phyla were positively correlated with AK. Land-use indirectly affected the relative abundance of bacterial phyla through effects on soil moisture, clay, and AK contents, and that of fungal phyla through effects on clay and AK contents. In addition, land-use effects on bacteria were greater than those on fungi, indicating that bacterial communities were more sensitive to land-use changes. Management regimes that incorporate soil carbon conservation, potassium addition, and judicious irrigation are expected to benefit the stability of the plant–soil system in the Dry-Hot Valley.

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Isolation and Screening for Multi-trait Plant Growth Promoting Actinobacteria From Organic Sugarcane Rhizosphere

Cited by 5 publications

References 80 publications

Actinobacteria from Extreme Niches in Morocco and Their Plant Growth-Promoting Potentials

Actinobacteria from Extreme Niches in Morocco and Their Plant Growth-Promoting Potentials

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

Land-Use Driven Changes in Soil Microbial Community Composition and Soil Fertility in the Dry-Hot Valley Region of Southwestern China

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