scholarly journals   Plant growth promoting rhizobacteria in the production of English ryegrass

2012 ◽  
Vol 58 (No. 10) ◽  
pp. 477-480 ◽  
Author(s):  
D. Stamenov ◽  
M. Jarak ◽  
S. Đurić ◽  
D. Milošev ◽  
T. Hajnal-Jafari
Keyword(s):  
Total Yield ◽  
Plant Growth Promoting Rhizobacteria ◽  
Dry Mass ◽  
The Third ◽  
Number Of Microorganisms ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Rhizospheric Microorganisms ◽  
Fresh And Dry Mass ◽  
Number Of Bacteria

The effect of inoculation with Pseudomonas fluorescens and Bacillus subtilis on the yield of fresh and dry mass of English ryegrass (Lolium perenne L.) as well as on the number of rhizospheric microorganisms was studied. The microorganisms were introduced into the soil before sowing. The control plots were not inoculated. The number of microorganisms was determined after the third mowing. The yield was determined after the first, second and third mowing. In comparison with the control, after the first and second mowing, there was a statistically significant increase in the fresh and dry mass in both inoculated variants whereas after the third mowing, a statistically significant increase in the yield of fresh mass was recorded only in the variant with B. subtilis. The use of B. subtilis had a better effect on the total yield of the fresh and dry mass of English ryegrass. The number of the investigated groups of microorganisms, apart from actinomycetes, increased in the inoculated variants. Inoculation of P. fluorescens affected the increase of total number of bacteria and aminoheterotrophs whereas inoculation of B. subtilis affected the increase of the number of azotobacter and fungi.    

scholarly journals Identifikasi Plant Growth Promoting Rhizobacteria pada Rizosfer Bambu Duri dengan Gram KOH 3%

2020 ◽  
Vol 4 (1) ◽  
pp. 41
Author(s):  
Muhammad Yusril Hardiansyah ◽  
Yunus Musa ◽  
Abdul Mollah Jaya
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Test Method ◽  
Growth And Yield ◽  
Testing Methods ◽  
Scatter Method ◽  
Reaction Test ◽  
Number Of Microorganisms ◽  
Plant Growth Promoting ◽  
Growth Promoting

<p class="Abstract">Plant Growth Promoting Rhizobacteria is a group of microorganism that is able to increase plant growth and yield through reactions in the soil, but the large number of microorganisms contained in PGPR's rhizosphere from thorn bamboo make it difficult to know which bacteria are the most dominant and most active in influencing plants. This study aimed to determine the effect of using the 3% gram KOH test method in identifying PGPR bacteria from the thorn bamboo rhizosphere. This test was carried out at the Biofertilizer and Potential Microbial Laboratory, Faculty of Agriculture, Universitas Hasanuddin from October-December 2019. The testing methods include making microorganism growing media, pouring media, planting bacteria with the scatter and scratch methods, also the gram reaction test using KOH 3%. The results obtained the use of the 3% gram KOH test method in the scatter method showed there were 2 samples that have mucus with a percentage of 40%, while in the scratch method showed all samples have mucus with a percentage of 100% so that the use of the 3% gram KOH test method has an optimum effect in detecting microorganisms especially in identifying plant growth promoting rhizobacteria.</p>

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 Investigation of salt-tolerant rhizosphere bacteria from seawater-intruding paddy rice field in Vietnam

2020 ◽  
Vol 42 (3) ◽  
Author(s):  
Ho Tu Cuong ◽  
Bui Van Cuong ◽  
Lam Thuong Thuong ◽  
Tran Mai Hoang ◽  
Luong Thi Thu Huong ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Rice Paddy ◽  
Paddy Rice ◽  
Salt Tolerant ◽  
Plant Growth Promoting ◽  
Paddy Rice Field ◽  
Growth Promoting ◽  
Indole 3 Acetic Acid ◽  
Number Of Bacteria

Salt‐tolerant plant growth‐promoting rhizobacteria (ST‐PGPR) are known as potential tools to improve rice salinity tolerance. In this study, we aimed to investigate the plant growth‐promoting rhizobacteria community richness of the paddy rice fields in Soc Trang and Ben Tre Provinces where were seriously affected by sea level rise. The salinity in the sampling sites ranged from 0.14‰ to 2.17‰ in November 2018, the rainy season. The microbial abundance of samples was evaluated by spreading the samples in tryptic soy agar (TSA) medium supplemented with various concentrations of NaCl. With the increase of salt concentration up to 10% NaCl, a total number of bacteria decreased for all the samples, ranging from 106 to 104 CFU/g, and bacterial colonies were not observed at 30% NaCl. Among a total of 48 salt-resisting bacteria isolated from the rice paddy field mud surrounding the rice root, 22 isolates were able to produce indole-3-acetic acid (IAA: phytohormone for the plant growth). Seventeen out of 48 isolates were able to grow in the medium without nitrogen or phosphor sources. Six isolates having high IAA producing activity, nitrogen fixation and phosphate solubilization were belonged to Bacillus (DT6, LT16, and LHT8), Halobacillus (DT8), Aeromonas (LHT1), and Klebsiella (LHT7) genera. All the sequences of the strains DT6, DT8, LT16, LHT1, LHT7, and LHT8 were registered in the GeneBank with the accession numbers MK335670, MK335671, MK335672, MK335673, MK335674, and MK335675, respectively. 

scholarly journals Torulaspora globosa: rhizosphere yeast promoting lettuce growth on seedlings and under field conditions

2019 ◽  
Vol 37 (3) ◽  
pp. 266-271
Author(s):  
Paloma G Cabrini ◽  
Fernando C Sala ◽  
Márcia M Rosa Magri
Keyword(s):  
Growth Promotion ◽  
Plant Growth Promoting Rhizobacteria ◽  
Dry Mass ◽  
Field Conditions ◽  
Field Inoculation ◽  
Health Maintenance ◽  
Plant Growth Promoting ◽  
Lettuce Growth ◽  
Number Of Leaves ◽  
Growth Promoting

ABSTRACT Among soil microorganisms, one group stands out as beneficial to agricultural activities: a plant growth-promoting rhizobacteria (PGPM). These microorganisms support plants through phytohormone production, nutrient provision and plant health maintenance. Among these PGPM, yeasts have a high potential, which is still not very well known.This study aimed to evaluate the effect of inoculation with the rhizosphere yeast Torulaspora globosa (strain 5S55) on development of lettuce (cv. Crocantela). The first research consisted of inoculating seeds with yeast (100 cells/seed), and inoculating seeds, 7 and/or 15 days after emergence (DAE) (1x106 cells/plant). The second one consisted of transplanting seedlings from the first experiment to field. Inoculation of seeds and seedlings provided a significant increase of seedling root dry mass; we observed the significant increase of 27% in productivity of lettuce under field conditions, of shoot fresh mass and a raise of number of leaves per plant. However, studies on inoculation methods, inoculum formulation, cell concentration are essential to optimize the results in growth promotion and to establish technology.

Aplikasi Bacillus subtilis pada beberapa Bahan Organik terhadap Pertumbuhan dan Produksi Tanaman Cabai Rawit (Capsicum frutescens L.)

2020 ◽  
Vol 21 (1) ◽  
pp. 14-19
Author(s):  
Praptiningsih Gamawati Adinurani ◽  
Sri Rahayu ◽  
Nurul Fima Zahroh
Keyword(s):  
Bacillus Subtilis ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Capsicum Frutescens ◽  
Plant Growth Promoting ◽  
Growth Promoting

Mikroba Bacillus subtilis merupakan agen pengendali hayati mempunyai kelebihan sebagai Plant Growth Promoting Rhizobacteria (PGPR) yaitu dapat berfungsi sebagai biofertilizer, biostimulan, biodekomposer dan bioprotektan. Tujuan penelitian mengetahui potensi B. subtilis dalam merombak bahan organik sebagai usaha meningkatkan ketersediaan bahan organik tanah yang semakin menurun. Penelitian menggunakan Rancangan Petak Terbagi dengan berbagai  bahan organik sebagai petak utama (B0 = tanpa bahan organik, B1 = kotoran ayam,  B2 = kotoran kambing, B3 = kotoran sapi) dan aplikasi B.subtilis sebagai anak petak (A0 = 0 cc/L, A1 = 5cc/L, A2 = 10 cc/L, Pengamatan meliputi variabel tinggi tanaman, indeks luas daun, jumlah buah per tanaman, berat buah per tanaman, dan bahan organik tanah. Data pengamatan  dianalisis ragam  menggunakan  Statistical Product and Service Solutions (SPSS) versi 25 dan dilanjutkan dengan uji Duncan untuk mengetahui signifikansi perbedaan antar perlakuan. Hasil penelitian menunjukkan tidak terdapat interaksi antara bahan organik kotoran ternak dan konsentrasi B. subtilis terhadap semua variabel pengamatan. Potensi B. subtilis sangat baik dalam mendekomposisi bahan organik yang ditunjukkan dengan peningkatan bahan organik, dan hasil terbaik pada kotoran  sapi (B3) dan konsentrasi B. subtilis 15 mL/L masing-masing sebesar 46.47 % dan 34.76 %. Variabel pertumbuhan tidak berbeda nyata kecuali tinggi tanaman dengan pertambahan tinggi paling banyak pada pemberian kotoran kambing sebesar 170.69 %.

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