Plant growth promoting mechanisms and aluminum tolerance in bacteria isolated from the rhizosphere of an Amazonian native palm tree

2020 ◽  
Author(s):  
José Odair Pereira ◽  
Lucas Smith Pimenta ◽  
João Lúcio de Azevedo
Keyword(s):  
Plant Growth ◽  
Aluminum Tolerance ◽  
Palm Tree ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Whole Genome Sequencing and Genome Annotation of PGPR ‘Exiguobacterium sp. TNDT2’ Isolated from Dates Palm Tree Rhizospheric Soil

2021 ◽  
Author(s):  
Thennarasu Sugumar ◽  
Punithavathi Srinivasan ◽  
B. Muthukumar ◽  
E. Natarajan
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Genome Annotation ◽  
Growth Promotion ◽  
Multi Drug Resistance ◽  
Palm Tree ◽  
Whole Genome ◽  
Agricultural Practice ◽  
Plant Growth Promoting ◽  
Growth Promoting

Background: Dates palm is one of the most economically important plant mainly cultivated in Northern Africa, Middle East and South Asia. India is the largest importer of date fruit. In India, Dates palm are cultivated majorly in Gujarat and Rajasthan. Dates farmers facing several problem in India due to lack of scientific resources. Plant growth promoting rhizobacteria (PGPR) are naturally associated with plants and it improves plant growth and yield by providing growth supplements, increasing tolerance to stressful conditions and providing resistance to fungal/bacterial diseases. We have isolated a PGPR belonging to Exiguobacterium species TNDT2 from Indian dates palm Phoenix dactylifera, in Dindigul region, Tamilnadu, India. The organism’s genome was sequenced and identified several potential plant growth promoting (PGP) genes. Methods: The organisms genome was sequenced using Whole genome shotgun sequencing method in Illumina platform. Sequences are analysed using various bioinformatics tools and assembled using Velvet assembler. Contigs are annotated using RAST server and deposited in NCBI. Result: The isolated strain revealed various genetic determinants required for plant growth promotion. This study presents the first report of Exiguobacterium TNDT2 genome from Dates tree rhizosphere. Whole genome analysis and genome annotation reveals that, its genome consist of a 2,891,840 bp chromosome encoding over 3062 proteins, with a 51.63% GC content. Strain TNDT2 encodes a wide repertoire of proteins for plant growth promotion, heavy metal detoxification (cadmium, arsenic, mercury, copper and tellurite), Multi-drug resistance and stress resistance (Heat, cold and salt). Based on this study, Exiguobacterium sp. TNDT2 can be recognized as an important organism with a potential to be incorporated into agricultural practice of Date palm.

scholarly journals The Date Palm Tree Rhizosphere Is a Niche for Plant Growth Promoting Bacteria in the Oasis Ecosystem

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Raoudha Ferjani ◽  
Ramona Marasco ◽  
Eleonora Rolli ◽  
Hanene Cherif ◽  
Ameur Cherif ◽  
...  
Keyword(s):  
Plant Growth ◽  
Bacterial Communities ◽  
Date Palm ◽  
Arid Ecosystems ◽  
Palm Tree ◽  
Plant Growth Promoting Bacteria ◽  
Pgp Traits ◽  
Environmental Selection ◽  
Plant Growth Promoting ◽  
Growth Promoting

In arid ecosystems environmental factors such as geoclimatic conditions and agricultural practices are of major importance in shaping the diversity and functionality of plant-associated bacterial communities. Assessing the influence of such factors is a key to understand (i) the driving forces determining the shape of root-associated bacterial communities and (ii) the plant growth promoting (PGP) services they provide. Desert oasis environment was chosen as model ecosystem where agriculture is possible by the microclimate determined by the date palm cultivation. The bacterial communities in the soil fractions associated with the root system of date palms cultivated in seven oases in Tunisia were assessed by culture-independent and dependent approaches. According to 16S rRNA gene PCR-DGGE fingerprinting, the shapes of the date palm rhizosphere bacterial communities correlate with geoclimatic features along a north-south aridity transect. Despite the fact that the date palm root bacterial community structure was strongly influenced by macroecological factors, the potential rhizosphere services reflected in the PGP traits of isolates screenedin vitrowere conserved among the different oases. Such services were exerted by the 83% of the screened isolates. The comparable numbers and types of PGP traits indicate their importance in maintaining the plant functional homeostasis despite the different environmental selection pressures.

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 %.

Isolation and identification of plant growth-promoting bacteria associated with tall fescue

2009 ◽  
pp. 211-216 ◽  
Author(s):  
J. Monk ◽  
E. Gerard ◽  
S. Young ◽  
K. Widdup ◽  
M. O'Callaghan
Keyword(s):  
New Zealand ◽  
Plant Growth ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Plant Growth Promoting Bacteria ◽  
Beneficial Bacteria ◽  
Isolation And Identification ◽  
Naturally Occurring ◽  
Plant Growth Promoting ◽  
Growth Promoting

Tall fescue (Festuca arundinacea) is a useful alternative to ryegrass in New Zealand pasture but it is slow to establish. Naturally occurring beneficial bacteria in the rhizosphere can improve plant growth and health through a variety of direct and indirect mechanisms. Keywords: rhizosphere, endorhiza, auxin, siderophore, P-solubilisation

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