scholarly journals Influence of Bacillus sp. on soil chemical and microbiological attributes and development of soybean and maize

2021 ◽  
Vol 12 (3) ◽  
pp. 383-393
Author(s):  
Alex João Alves ◽  
Danielly Wisoczynski de Sene ◽  
Gabriel Ferreira de Paula ◽  
Gilberto Bueno Demétrio ◽  
Leopoldo Sussumu Matsumoto
Keyword(s):  
Microbial Activity ◽  
Plant Development ◽  
Plant Growth Promoting Rhizobacteria ◽  
Cultivated Plants ◽  
Bacillus Sp ◽  
Genus Bacillus ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Increase In Productivity ◽  
Different Doses

Plant growth-promoting rhizobacteria (PGPR) inhabit the rhizosphere of several cultivated plants. Bacteria of the genus Bacillus have great functional importance in plant development. The objective of this research was to evaluate different doses of Bacillus sp. in the development of soybean and corn crops and in the chemical and microbiological attributes of the soil. The essays were conducted in the field in the 2016/2017 harvest. The soybean and corn seeds were treated with two doses of Bacillus sp. at a concentration of 109 CFU ml-1, with 10 and 20 ml of 100 kg of seed used in soybeans and 80 and 100 ml of 100 kg of seed in corn. The experiments were completely randomized in block with four repetitions. Chemical and microbiological attributes and plant development were evaluated. The results showed that the microbial activity was achieved at the dose of 20 ml of Bacillus sp. and positively influenced the weight of the grains and soybean productivity. In corn crops, the dose of 80 ml of Bacillus sp. showed better performance on chemical and microbiological attributes, resulting in increased shoot and root mass, and a significant increase in productivity. From the results obtained, it can be concluded that the use of Bacillus sp. it is a viable alternative for sustainable agriculture, and the dose of 20 ml and 80 ml of 100 kg of soybean and corn seeds, respectively, presented better results in microbial activity and in the development of plants.

Evaluation of biocontrol agro-techniques against R. solani: study of microbial communities catabolic profile modifications

2011 ◽  
Vol 149 (5) ◽  
pp. 595-607
Author(s):  
G. SACRISTÁN-PÉREZ-MINAYO ◽  
J. I. REGUERA-USEROS ◽  
D. J. LÓPEZ-ROBLES ◽  
A. GARCÍA-VILLARACO ◽  
F. J. GUTIÉRREZ-MAÑERO
Keyword(s):  
Integrated Management ◽  
Economic Cost ◽  
Plant Growth Promoting Rhizobacteria ◽  
Microbial Evolution ◽  
Common Disease ◽  
Damping Off ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Micro Organisms ◽  
Different Doses

SUMMARYDamping off is the most common disease caused by edaphic fungi in Spanish crops, among which Rhizoctonia solani AG-4 stands out. In the present work, two possible methods of control were evaluated, incorporation of different doses of organic matter (OM; obtained from strawberry crops) and Pseudomonas fluorescens as a plant growth promoting rhizobacteria (PGPR). The highest inhibition (43% less) against the pathogen was found in the assays that used 20 g of biofumigant/kg soil. Inoculation of the P. fluorescens strain (PGPR) did not protect against the pathogen. In addition, the microbial evolution during incubation with OM was studied. For this purpose, the bacterial and fungal catabolic profiles were determined (using Biolog Eco and FF plates, respectively) as well as bacterial counts of total aerobes, Pseudomonas sp. and aminocyclopropane-1-carboxylate (ACC)-degrading populations, during OM incorporation. This agro-technique produced changes in microbial catabolic community profiles, increasing bacterial metabolic activity and minimizing metabolic diversity of micro-organisms under control with and without pathogen. As for microbial counts, aerobic and ACC-degrading populations decreased while Pseudomonas sp. population increased with OM treatments.The OM amendment applied to control the damping off caused by R. solani is viable; it is more environmentally friendly and has a lower economic cost than chemical controls and, therefore, it could serve as a component in integrated-management programmes.

scholarly journals Effect of plant growth promoting rhizobacteria (PGPR) and IBA treatments on rooting in cuttings of apple (Malus × domestica Borkh.) clonal rootstock Merton 793

2017 ◽  
Vol 9 (2) ◽  
pp. 1135-1138
Author(s):  
Pramod Verma ◽  
P. S. Chauhan ◽  
J. S. Chandel
Keyword(s):  
Plant Growth ◽  
Bacillus Licheniformis ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Bacillus Sp ◽  
Main Shoot ◽  
Primary Roots ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Different Strains

The preliminary studies on the effect of different strains of plant growth promoting rhizobacteria (PGPR) alone and in combination with IBA at 1000 ppm on rooting in cuttings of apple clonal rootstock Merton 793 were carried out during 2012-13. The PGPR strains (RG (1)3 – Bacillus sp.), B6 – Bacillus licheniformis and R3 (3) – Sirretia sp. alone failed to induce rooting response in cuttings of apple clonal rootstock Merton 793. The results revealed that IBA 2500 ppm recorded the maximum rooting (65 %), number of primary roots (5.00), length (28.43 cm) and diameter (3.25 mm) of primary roots, fresh (3.67 g) and dry weight (2.59 g) of roots, length of main shoot (134.14cm), diameter of main shoot (8.18 mm), fresh (30.40 g) and dry weight (22.60 g) of shoots in cuttings of Merton 793. However, the PGPR strains RG (1)3 – Bacillus sp., B6 – Bacillus licheniformis and R3 (3) – Sirretia sp. in combination with IBA 1000 ppm showed improvement in rooting of cuttings to the extent of 10, 15 and 5 per cent rooting, respectively and growth of the rooted plants. IBA at 2500 ppm resulted better rooting and growth of rooted plants. Hence, this treatment is suggested for commercial propagation of apple clonal rootstock Merton 793 through cuttings.

scholarly journals Effect of Indigenous Pseudomonas sp. and Bacillus sp. Strains on Yield and Main Chemical Growth Parameters of Radicchio

2018 ◽  
Vol 67 (1) ◽  
pp. 20-26
Author(s):  
Aleksandra Stanojković-Sebić ◽  
Radmila Pivić ◽  
Zoran Dinić ◽  
Renata Iličić ◽  
Dragana Latković ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Parameters ◽  
Plant Growth Promoting Rhizobacteria ◽  
Pseudomonas Sp ◽  
Bacillus Sp ◽  
Aerial Parts ◽  
Dry Biomass ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Calcium And Magnesium

Summary Pseudomonas sp. and Bacillus sp. belong to plant growth promoting rhizobacteria which are able to colonize the plants roots and stimulate growth. In this study, the effect of two indigenous plant growth promoting rhizobacterial strains Pseudomonas sp. Q4 and Bacillus sp. Q10 and their mixture (mix Q4+Q10) on content of the main chemical growth parameters (nitrogen, phosphorus, potassium, calcium and magnesium) and the yield of dry biomass of radicchio (Cichorium spp. var. rossa di treviso) aerial parts and root, was investigated. The study was carried out with stagnosol type of soil in pot experiments under semi-controlled conditions in the Institute of Soil Science (Belgrade), in the period from July to October in 2013. Phosphorus was determined by spectrophotometer, potassium - by flame emission photometry and total nitrogen and carbon - using elemental CNS analyzer, while calcium and magnesium were determined by AAS. The data on yield of both aerial parts and root dry biomass of radicchio showed that its treatment with Q4 and Q10 strains, as well as with their mixture, caused noticeably increase in this parameter in relation to the control, whereby the strain Q4 was more effective for aerial parts, while mix Q4+Q10 - for roots. The obtained data on the studied chemical parameters of radicchio root and aerial parts were in total accordance with their yield. Concluding, studied strains have a potential in promoting the biomass yield and main chemical growth parameters of both aerial parts and root of radicchio.

scholarly journals ISOLASI DAN KARAKTERISASI BAKTERI PENGHASIL IAA (INDOLE ACETIC ACID) DARI RHIZOSFER TANAMAN AKASIA (Acacia mangium)

2020 ◽  
Vol 3 (2) ◽  
pp. 210-219
Author(s):  
Ika Agus Rini ◽  
Indah Oktaviani ◽  
Muhammad Asril ◽  
Revi Agustin ◽  
Fina Khaerunissa Frima
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Indole Acetic Acid ◽  
Acacia Mangium ◽  
Plant Growth Promoting Rhizobacteria ◽  
Genus Bacillus ◽  
Plant Growth Promoting ◽  
Growth Promoting

IAA adalah produk paling umum dari metabolisme L-triptofan yang dapat diproduksi oleh beberapa mikroorganisme. Beberapa mikroorganisme yang memiliki potensi menghasilkan IAA adalah bakteri rhizosfer pada tanaman Leguminosae, salah satunya adalah akasia. Acacia mangium, juga dikenal sebagai akasia, adalah pohon yang tumbuh cepat. Namun, akasia adalah tanaman invasif. Tanaman akasia memiliki bintil yang merupakan hasil simbiosis akar tanaman dan bakteri. Simbiosis ini dapat mempengaruhi kesuburan tanah. Banyak potensi yang dapat digali dari bakteri tanah, khususnya di rhizosfer. Tujuan dari penelitian ini adalah untuk mengisolasi dan mengidentifikasi bakteri pada rizosfer tanaman akasia yang mampu menghasilkan IAA sebagai salah satu potensi untuk kandidat PGPR (Plant Growth Promoting Rhizobacteria). Metode yang digunakan meliputi pengambilan sampel, isolasi bakteri penghasil IAA, pemurnian bakteri, identifikasi bakteri dan uji biokimia, pembuatan kurva tumbuha bakteri, dan uji isolat bakteri pelarut fosfat. Hasil isolasi bakteri rhizosfer diperoleh sebanyak 10 isolat bakteri yang memiliki karakteristik berbeda secara morfologi.  Berdasarkan hasil identifikasi bakteri berdasarkan pewarnaan Gram, bakteri tersebut masuk ke dalam genus Bacillus dan terdapat 5 isolat bakteri yang memiliki kemampuan menghasilkan IAA dan melarutkan fosfat sehingga bakteri tersebut memiliki potensi sebagai pupuk hayati.

Isolation of plant-growth-promoting rhizobacteria from rhizospheric soil of halophytes and their impact on maize (Zea mays L.) under induced soil salinity

2015 ◽  
Vol 61 (4) ◽  
pp. 307-313 ◽  
Author(s):  
Sami Ullah ◽  
Asghari Bano
Keyword(s):  
Plant Growth ◽  
Growth Promotion ◽  
Plant Growth Promoting Rhizobacteria ◽  
Dry Mass ◽  
Bacillus Sp ◽  
Rhizospheric Soil ◽  
Maize Crop ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Suaeda Fruticosa

The present investigation was aimed to scrutinize the salt tolerance potential of plant-growth-promoting rhizobacteria (PGPR) isolated from rhizospheric soil of selected halophytes (Atriplex leucoclada, Haloxylon salicornicum, Lespedeza bicolor, Suaeda fruticosa, and Salicornica virginica) collected from high-saline fields (electrical conductivity 4.3–5.5) of District Mardan, Pakistan. Five PGPR strains were identified using 16S rRNA amplification and sequence analysis. Bacillus sp., isolated from rhizospheric soil of Atriplex leucoclada, and Arthrobacter pascens, isolated from rhizospheric soil of Suaeda fruticosa, are active phosphate solubilizers and bacteriocin and siderophore producers; hence, their inoculation and co-inoculation on maize (‘Rakaposhi’) under induced salinity stress enhanced shoot and root length and shoot and root fresh and dry mass. The accumulation of osmolytes, including sugar and proline, and the elevation of antioxidant enzymes activity, including superoxide dismutase, peroxidase, catalase, and ascorbate peroxidase, were enhanced in the maize variety when inoculated and co-inoculated with Bacillus sp. and Arthrobacter pascens. The PGPR (Bacillus sp. and A. pascens) isolated from the rhizosphere of the mentioned halophytes species showed reliability in growth promotion of maize crop in all the physiological parameters; hence, they can be used as bio-inoculants for the plants growing under salt stress.

scholarly journals Plant Root Enhancement by Plant Growth Promoting Rhizobacteria

2021 ◽  
Author(s):  
Metin Turan ◽  
Tuba Arjumend ◽  
Sanem Argın ◽  
Ertan Yıldırım ◽  
Hikmet Katırcıoğlu ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Development ◽  
Plant Root ◽  
Lateral Roots ◽  
Root Hairs ◽  
Plant Growth Promoting Rhizobacteria ◽  
Root System Architecture ◽  
Molecular Characteristics ◽  
Plant Growth Promoting ◽  
Growth Promoting

Soil microorganisms perform a variety of functions, some of which are extremely helpful to the maintenance of ecological sustainability. Bacteria thriving in the plant rhizosphere drive plant development through a variety of ways, which are referred to as PGPR (plant growth-promoting rhizobacteria). Despite the fact that there are many different types of PGPR, their significance and applications in sustainable agriculture are still debated and limited. The performance of PGPR varies, which might be related to a variety of environmental conditions that impact their development and proliferation in plants. PGPR is a nonpathogenic, friendly bacterium that stimulates plant development by altering hormone concentrations and nutritional needs, as well as mitigating stress-related damage. PGPR colonizes root hairs and lateral roots in plants, where they may exhibit their beneficial characteristics. Rhizobacteria that promote plant development have the ability to control root system architecture (RSA), as well as the vegetative growth and physiology of the entire plant. The generation of hormones like Indole acetic acid (IAA) by PGPR has long been linked to RSA effects. This book chapter reviews to show PGPR affects on the growth, physiological, biochemical, and molecular characteristics of plant roots.

scholarly journals Influencia de rizobacterias en la producción y calidad nutracéutica de tomate bajo condiciones de invernadero

2018 ◽  
Vol 9 (2) ◽  
pp. 367-379 ◽  
Author(s):  
Gabriela González Rodríguez ◽  
Bernardo Espinosa Palomeque ◽  
Pedro Cano Ríos ◽  
Lucio Leos Escobedo ◽  
Homero Sánchez Galván ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Bacillus Sp ◽  
Plant Growth Promoting ◽  
Growth Promoting

Una alternativa en la agricultura orgánica es la utilización de biofertilizantes base rizobacterias promotoras del crecimiento vegetal y abonos orgánicos “plant growth promoting rhizobacteria (PGPR) por sus siglas en inglés”. El objetivo fue evaluar el efecto de la inoculación de PGPR (Bacillus sp., Aeromonas sp. y Pseudomonas lini), utilizando dos sustratos: S1= compost+arena de río+perlita, y S2= arena de río y como testigos ambos sustratos sin PGPR (ocho tratamientos), sobre el rendimiento y calidad de frutos de tomate producidos en invernadero. El diseño experimental utilizado fue completamente al azar con tres repeticiones en un arreglo factorial (2×4), donde los factores A y B fueron: a) sustratos y b) PGPR. Los resultados indican que el sustrato S1 incremento los contenidos de SST, licopeno, azúcares totales, ácido ascórbico y el porcentaje de ácido cítrico en frutos de tomate. La inoculación de la cepa Bacillus sp., produjo los mayores contenidos de SST, licopeno y ácido ascórbico en frutos de tomate. En base al conjunto de respuestas en los frutos de tomate desarrollados con diferentes sustratos y PGPR, el mejor tratamiento fue el T1 (Bacillus sp. + S1) el cual incremento un 17.54, 8.77, 17.34, 31.31 y 11.52%, el rendimiento, los contenidos de SST, licopeno, azúcares reductores y ácido ascórbico, respectivamente, en relación con el resto de los tratamientos. Por lo tanto, la cepa Bacillus sp. y el sustrato base compost podrían ser una alternativa, debido que mejoran la calidad nutracéutica de frutos, sin disminuir el rendimiento de tomate en invernadero.

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