Observation table :
Uses
Characteristics
Organism and their classification
1. Azotobacter
Underline the correct word :
• Oval and round/rectangular in 1. Ability to fix molecular nitrogen/
nitrogen
shape.
and
compounds
therefore
the
increase
• Develop hard cyst/crust around.
soil
Freely living/parasitic in soil. fertility and stimulate overall
plant growth/only height.
2. Azotobacter species are widely
used in agriculture, particularly
in nitrogen biofertilizers such
as
azotobacterin/antibioti
bacterin.
Kingdom: Monexg
Division proteo bacteria.
....
Answers
Explanation:
Adero VO, Raju NS, Supreeth M. Effect of Glyphosate Herbicide on
Nitrogen Fixing Bacteria-Azotobacter Species. J Environ Chem Toxicol
2020;4(2):1-7.
BACKGROUND: Glyphosate, a broad-spectrum, nonselective, systemic
herbicide, exists in the form of acid or salt and the most widely used
herbicide in the world to control weeds especially grasses. It kills plants by
interfering with the synthesis of the aromatic amino acids phenylalanine,
tyrosine, and tryptophan in the shikimate pathway by inhibiting the enzyme
5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), which catalyzes the
reaction of shikimate-3-phosphate (S3P) and phosphoenolpyruvate to form
5-enolpyruvyl-shikimate-3-phosphate (EPSP). Azotobacter, a gram negative,
genus of motile, oval or spherical shaped aerobic, free-living soil microbes,
play important role in nitrogen fixation. The use of glyphosate to control
weeds has been thought to have effects on the growth and survivability of
Azotobacter and hence this study was carried out to assess these effects.