The plant-growth-promoting rhizobacteria Bacillus pumilus and Bacillus licheniformis produce high amounts of physiologically active gibberellins

2001 ◽  
Vol 111 (2) ◽  
pp. 206-211 ◽  
Author(s):  
Francisco Javier Gutiérrez-Mañero ◽  
Beatriz Ramos-Solano ◽  
Agustı´n Probanza ◽  
Jalel Mehouachi ◽  
Francisco R. Tadeo ◽  
...  
Keyword(s):  
Plant Growth ◽  
Bacillus Licheniformis ◽  
Bacillus Pumilus ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting

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 Evidence for Induced Systemic Protection to Fusiform Rust in Loblolly Pine by Plant Growth-Promoting Rhizobacteria

Plant Disease ◽  
2000 ◽  
Vol 84 (3) ◽  
pp. 306-308 ◽  
Author(s):  
S. A. Enebak ◽  
W. A. Carey
Keyword(s):  
Plant Growth ◽  
Loblolly Pine ◽  
Bacillus Pumilus ◽  
Plant Growth Promoting Rhizobacteria ◽  
Systemic Resistance ◽  
Bacterial Strains ◽  
Fusiform Rust ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Combined Data

Trials conducted in 1997 and 1998 tested eight strains of plant growth-promoting rhizobacteria (PGPR) for their capacity to induce systemic protection in loblolly pine to the causal agent of fusiform rust. Pine seeds were treated with bacteria at time of sowing, and seedlings were artificially inoculated with basidiospores of Cronartium quercuum f. sp. fusiforme 1 month later. Six months after basidiospore inoculation, seedlings were evaluated for the fusoid swelling or galls characteristic of rust infection. Compared with seedlings from seed not treated with bacteria, two bacterial isolates, Bacillus pumilus (SE34) and Serratia marcescens (90–166), significantly (P = 0.05) reduced the number of galls in 1997 and 1998. Combined data from 1997 and 1998 resulted in two additional isolates, B. pumilus (INR7) and B. pumilus (SE52), significantly (P = 0.05) reducing the number of galls. Averaged over both years, 31% of control seedlings were infected with fusiform rust, while those seedlings treated with bacterial strains SE34, 90–166, INR7, and SE52 had 13, 14, 15, and 16% infection, respectively. These four PGPR strains appear to have induced systemic resistance to fusiform rust in loblolly pine, resulting in less infection over nontreated control seedlings.

scholarly journals Plant Growth Enhancement using Rhizospheric Halotolerant Phosphate Solubilizing Bacterium Bacillus licheniformis QA1 and Enterobacter asburiae QF11 Isolated from Chenopodium quinoa Willd

2020 ◽  
Vol 8 (6) ◽  
pp. 948
Author(s):  
Ismail Mahdi ◽  
Nidal Fahsi ◽  
Mohamed Hafidi ◽  
Abdelmounaaim Allaoui ◽  
Latefa Biskri
Keyword(s):  
Plant Growth ◽  
Bacillus Licheniformis ◽  
Chenopodium Quinoa ◽  
Plant Growth Promoting Rhizobacteria ◽  
Phosphate Solubilizing Bacteria ◽  
Saline Irrigation ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Phosphate Solubilizing ◽  
Enterobacter Asburiae

Plant growth-promoting rhizobacteria represent a promising solution to enhancing agricultural productivity. Here, we screened phosphate solubilizing bacteria from the rhizospheric soil of Chenopodium quinoa Willd and assessed their plant-growth promoting rhizobacteria (PGPR) properties including production of indole-3-acetic acid (IAA), siderophores, hydrogen cyanide (HCN), ammonia and extracellular enzymes. We also investigated their tolerance to salt stress and their capacity to form biofilms. Two isolated strains, named QA1 and QF11, solubilized phosphate up to 346 mg/L, produced IAA up to 795.31 µg/mL, and tolerated up to 2 M NaCl in vitro. 16S rRNA and Cpn60 gene sequencing revealed that QA1 and QF11 belong to the genus Bacillus licheniformis and Enterobacter asburiae, respectively. In vivo, early plant growth potential showed that quinoa seeds inoculated either with QA1 or QF11 displayed higher germination rates and increased seedling growth. Under saline irrigation conditions, QA1 enhanced plant development/growth. Inoculation with QA1 increased leaf chlorophyll content index, enhanced P and K+ uptake and decreased plant Na+ uptake. Likewise, plants inoculated with QF11 strain accumulated more K+ and had reduced Na+ content. Collectively, our findings support the use of QA1 and QF11 as potential biofertilizers.

scholarly journals Effect of plant growth promoting rhizobacteria on Ambrosia rtemisiifolia L. seed germination

2011 ◽  
Vol 26 (2) ◽  
pp. 141-146 ◽  
Author(s):  
Sava Vrbnicanin ◽  
Dragana Bozic ◽  
Marija Saric ◽  
Danijela Pavlovic ◽  
Vera Raicevic
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Bacillus Licheniformis ◽  
Soil Bacteria ◽  
Plant Growth Promoting Rhizobacteria ◽  
Ambrosia Artemisiifolia ◽  
Azotobacter Chroococcum ◽  
Weed Species ◽  
Plant Growth Promoting ◽  
Growth Promoting

Soil bacteria are able either to stimulate or inhibit seed germination. If seed germination is stimulated, the seedlings of weed species emerge more uniformly, so that they could be killed in the next step of weed control. This investigation focused on testing the germination of Ambrosia artemisiifolia L. on several media: Pseudomonas fluorescens (B1), Azotobacter chroococcum (B2), Bacillus licheniformis (B3), B. pumilus (B4), B. amyloliquefaciens (B5). In control, seeds germinated in water. Seed germination varied depending on bacterial media. Germination was inhibited by bacterial treatments B1 and B3, treatments B2 and B4 stimulated germination, while germination in treatment B5 was similar to control.

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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