Which type of bacteria is Azospirillum?
Abstract. Azospirillum represents the best characterized genus of plant growth-promoting rhizobacteria. Other free-living diazotrophs repeatedly detected in association with plant roots, include Acetobacter diazotrophicus, Herbaspirillum seropedicae, Azoarcus spp. and Azotobacter.
Is Azospirillum brasilense Gram positive or negative?
Azospirillum brasilense is a Gram-negative, nitrogen-fixing bacterium that colonizes the rhizosphere of various grasses and cereals. This strain has one of the largest genomes in the phylum Proteobacteria.
Which species of Azospirillum is generally found associated with the roots of C4 plants?
Azospirillum doebereinerae sp. nov., a nitrogen-fixing bacterium associated with the C4-grass Miscanthus.
What is the role of Azospirillum?
Under certain environmental and soil conditions, Azospirillum can positively influence plant growth, crop yields and Nâcontent of the plant. This plant stimulatory effect exerted by Azospirillum has been attributed to several mechanisms, including biological nitrogen fixation and auxin production.
Where is Azospirillum found?
Azospirilla are mainly found in large numbers in tropical soils, but in various temperate zones, and even in tundra and semi-desert sites of the Canadian High Arctic [12] the isolation of Azospirillum spp. has been reported.
What is Azospirillum culture?
Get Latest Price. Azospirillum is liquid formulation of nitrogen fixing Azospirillum bacteria. Azospirillum fixes atmospheric nitrogen into available form and provides to the plant while enhancing the soil-water-plant relations and soil health.
Is Azospirillum aerobic or anaerobic?
Azospirillum are aerobic, but many can also function as microaerobic diazotrophs, meaning, under low oxygen conditions, they can change inert nitrogen from the air into biologically useable forms.
How much nitrogen does Azospirillum fix?
Analyses of field experiments have shown a success rate of inoculation with Azospirillum ranging from 60 to 70%, with statistically significant increases in yield varying from 5 to 30% [1]. The regulation of nitrogen metabolism in A. brasilense has been extensively studied.
What are the characteristic features of Azospirillum?
Characteristics. The genus Azospirillum belongs in the alpha-Proteobacteria class of bacteria. Azospirillum are gram-negative, do not form spores, and have a slightly-twisted oblong-rod shape. Azospirillum have at least one flagellum and sometimes multiple flagella, which they use to move rapidly.
Is Azospirillum photosynthetic or non photosynthetic?
Azospirillum: Azospirilla is Gram-negative free-living nitrogen-fixing rhizosphere bacteria. It is non- photosynthetic.
Is Azospirillum prokaryotic?
with Microalgae: A Basic EukaryoticâProkaryotic Model and Its Biotechnological Applications.