Atmospheric Nitrogen Fixing Capacity of Azotobacter Isolate from Cooch Behar and Jalpaiguri Districts Soil of West Bengal, India

Bag, Puspendu Bikash; Paramanik, Parimal Panda Bappa; Choudhury, Bisweswar Mahato Ashok

doi:10.20546/ijcmas.2017.603.204

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…zasiedlają wiele środowisk, takich jak: gleba, woda, osady ściekowe, ryzosfera i fyllosfera roślin. Bakterie te występują w różnych strefach klimatycznych, liczne szczepy izolowane są nawet z rejonów tropikalnych i polarnych [4,6,18,27]. Preferują one gleby o odczynie neutralnym i lekko zasadowym, natomiast rzadko występują w glebach kwaśnych o pH poniżej 6 [49,51].…”

Section: Wstępunclassified

Systematyka i Analizy Genomiczne Bakterii z Rodzaju Azotobacter

Kozieł

Gałązka

2021

Postępy Mikrobiologii - Advancements of Microbiology

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Streszczenie: Bakterie z rodzaju Azotobacter są przedmiotem wielu badań prowadzonych zarówno w Polsce jak i za granicą. Zainteresowanie tą grupą bakterii w dużej mierze związane jest z ich właściwościami, które mogą być wykorzystywane w rolnictwie. Najnowsze badania opierają się na zaawansowanych metodach molekularnych i bazują na poznanej sekwencji genomów dwóch gatunków: Azotobacter vine landii i Azotobacter chroococcum. W 2009 roku Setubal i in. opublikowali pełną sekwencję genomu Azotobacter vinelandii DJ, z kolei pełną sekwencję genomu Azotobacter chroococcum 8003 opublikowali Robson i in. w pracy z 2015 roku. Obie bakterie mają pojedynczy, kolisty chromosom o wielkości odpowiednio 5,365,318 pz. i 5,192,291 pz. Poznanie i porównanie sekwencji genomów Azotobacter vinelandii DJ i Azotobacter chroococcum 8003 pozwoliło odpowiedzieć na wiele pytań dotyczących ewolucji, różnorodności i miejsca tych bakterii w środowisku. Zsekwencjonowanie większej liczby genomów innych szczepów A. chroococcum i A. vinelandii przyniosłoby wiele korzyści i pozwoliłoby uporządkować dotychczasową wiedzę na ich temat. 1. Wstęp. 2. Pozycja taksonomiczna Azotobacter spp. 2.1. Bliskie pokrewieństwo bakterii z rodzajów Azotobacter i Pseudomonas. 2.2. Metody molekularne porównywania i grupowania bakterii w obrębie rodzaju/gatunków Azotobacter. 3. Analizy genomiczne przedstawicieli Azoto bacter spp. -szczepów Azotobacter vinelandii DJ i Azotobacter chroococcum 8003. 3.1. Porównanie genomów szczepów Azotobacter vine landii DJ i Azotobacter chroococcum 8003. 3.2. Ruchome elementy genetyczne szczepów Azotobacter vinelandii DJ i Azoto bacter chroococ cum 8003. 3.3. Charakterystyka wybranych genów szczepów Azotobacter vinelandii DJ i Azotobacter chroococcum 8003. 4. Podsumowanie SYSTEMATICS AND GENOMIC ANALYSIS OF BACTERIA OF THE GENUS

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Section: Wstępunclassified

Systematyka i Analizy Genomiczne Bakterii z Rodzaju Azotobacter

Kozieł

Gałązka

2021

Postępy Mikrobiologii - Advancements of Microbiology

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“…While Danapriatna (2016) verified the lower nitrogenase activity of some Azotobacter isolates from paddy rhizosphere; 24.63-134.29 nmol C2H4 g -1 h -1 . Five isolates of Azotobacter can fix 8.14-8.46 mg N g -1 glucose (Bag, Panda, Paramanik, Mahato, & Choudhury, 2017). More recently some studies showed that Azotobacter strains fix N2 was up to 73.8 kg ha -1 year -1 in soil (Mahato & Kafle, 2018).…”

Section: Mechanisms To Promote Plant Growth 321 Nitrogen Fixationmentioning

confidence: 99%

Role and perspective of Azotobacter in crops production

Hindersah

Kamaluddin

Samanta

et al. 2020

Sains Tanah J. Soil Sci. Agroclimatology

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<p>Low nitrogen content in soil is usually overcome by chemical fertilization. After long application period, high-dose and intensive use of N fertilizers can cause ammonia volatilization and nitrates accumulation in soil. In sustainable agriculture, the use of bacterial inoculant integrated with nutrient management system has a role in soil health and productivity. Azotobacter-based biofertilizer is suggested as a chemical nitrogen fertilizer substitute or addition in crop production to improve available nutrients in the soil, provide some metabolites during plant growth, and minimize fertilizer doses. The objective of this literature reviewed paper is to discuss the role of Azotobacter in agriculture; and the prospective of Azotobacter to increase yield and substitute the chemical fertilizer in food crops production. The results revealed that mechanisms by Azotobacter in plant growth enhancement are as biofertilizer, biostimulant, and bioprotectant. Nitrogen fixation by Azotobacter is the mechanism to provide available nitrogen for uptake by roots. Azotobacter stimulates plant growth through phytohormones synthesis; indole acetic acid, cytokinins, and gibberellins are detected in the liquid culture of Azotobacter. An indirect effect of Azotobacter is exopolysaccharide production and plant protection. Inoculation of Azotobacter in the field integrated with organic matter and reduced chemical fertilizer are reported to improve plant growth and yield.</p>

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“…Azotobacter are aerobic, free-living soil microbes which play an important role in the nitrogen fixation. The isolates of Azotobacter show positive nitrogen fixing capacity ranging from 3.16 to 12.66 mg N per gram of sucrose consumed (2). Azotobacter have a full range of enzymes needed to perform the nitrogen fixation such as ferredoxin, hydrogenase and an important enzyme nitrogenase (3).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Azotobacter chroococcum’s Ability to Produce Hydrolytic Enzymes and Enhance Growth of Vicia faba

Alsalim¹

2019

Baghdad Sci.J

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A. chroococcum isolate was examined for its ability to produce the hydrolytic enzymes chitinase, pectinase, protease, and lipase, in an effort to enhance the growth of fava bean (Vicia faba). Biological experiment was conducted in pots with complete random design (CRD). The experiment includes three treatments: control (plant without treatment) (P), NPK fertilizer (plant + fertilizer) (PF), and A. chroococcum inoculum (plant + A. chroococcum) (PA). These treatments were performed with sterile and non-sterile soil, which were planted with fava beans. At the end of experiment (seven weeks from planting), length and weight of plant shoot and plant root were calculated. The results show that the isolate was able to produce chitinase, pectinase, protease, and lipase enzymes. Plant growth increased with fertilizer and A. chroococcum inoculum addition. Fertilizer treatments (PF) were the best growth indicators, with the averages of shoot length and weight, and root length and weight of 19.52 cm, 15.55 gm, 19.93 cm, and 10.52 gm respectively. The averages of these indicators in A. chroococcum treatment (PA) were 16.4 cm, 8.85 gm, 17.52 cm, and 6.88 gm respectively. The percentages of increase caused by A. chroococcum inoculum addition (PA) in contrast with control treatment (P) were 12.83% and 34.4% in plant shoot length and weight respectively, and 60.98% and 38.99% in plant root length and weight. In general, growth indicators were higher in non-sterile than sterile soil, but these increases were not significant

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Atmospheric Nitrogen Fixing Capacity of Azotobacter Isolate from Cooch Behar and Jalpaiguri Districts Soil of West Bengal, India

Cited by 9 publications

References 10 publications

Systematyka i Analizy Genomiczne Bakterii z Rodzaju Azotobacter

Systematyka i Analizy Genomiczne Bakterii z Rodzaju Azotobacter

Role and perspective of Azotobacter in crops production

Assessment of Azotobacter chroococcum’s Ability to Produce Hydrolytic Enzymes and Enhance Growth of Vicia faba

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