PBIO 004 Lecture 10: Biological Interactions with Roots

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OC2617651

16 Feb 2019

School

University of Vermont

Department

Plant Biology

Course

PBIO 004

Professor

Mary Lauretta Tierney

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Document Summary

Legumes: a type of plant that can host bacteria that are able to fix nitrogen. Plants form intricate symbiosis with nitrogen-fixing bacteria and mycorrhizal fungi: nitrogen-fixing bacteria form nodules that facilitate nitrogen fixation on the roots of host plants. All plants need a source of fixed nitrogen for growth: nitrogen is often the limiting factor for plant growth, fertilizers provide a source of fixed nitrogen. Most plants require fertilizer for growth, but some plants form a symbiosis. Haber-bosch process, is for industrially producing ammonia for fertilizer (among other things) It takes immense energy supplies and creates pollutants as biproduct. Symbiotic nitrogen fixation occurs when certain nitrogen-fixing bacteria in soil react with roots of legumes: bacteria fix nitrogen using nitrogenase (bacterial enzyme) and a lot of atp, forming ammonia in the bacteria. Relationship between legumes and their rhizobial bacteria is very specific: different rhizobial species exclusively interact with different legume species.

Related Questions

"Helps fix nitrogen in soil. Boost pea and bean yields with Garden Soil Inoculant. Simply shake granules into furrows as you plant. It contains nitrogen-fixing bacteria to promote stronger root systems and larger harvests. Easy-to-use sprinkler top makes application a snap. 8.7-oz. container treats a 150' row." This product is recommended for growing plants such as beans and peas, for all of the following reasons EXCEPT: These plants can convert nitrogen gas to ammonia

These plants can convert nitrogen gas to ammonia

These plants form symbiotic relationships with bacteria in the product.

These plants are legumes.

These plants produce root nodules that harbor bacteria.

Molecular nitrogen (nitrogen gas) makes up 78% of the Earthâs atmosphere, but is unavailable for use by all organisms except for some nitrogen-fixing ____. (Choose all correct answers.)

bacteria

cyanobacteria

eukaryotes

prokaryotes

fungi

Protists

Nitrogen gas is a chemically inert molecule. The prokaryotes that fix-nitrogen produce the enzyme nitrogenase. What does this enzyme do that allows these organisms to use nitrogen gas? (Hint: You might want to consult a chemistry book to help you with this answer.)

In biological nitrogen fixation (N2, ammonia, hydrogen, oxygen), is (Reduced, oxidized) when it accepts atoms, resulting in the production of (nitrogen gas, nitrate, water, ammonia ) .

Legumes produce (nitrogen, nitrogenase, lehemoglobin,oxygen ,bacteria) , which regulates the amount of (nitrogen, nitrogenase, lehemoglobin,oxygen ,bacteria) present in the root nodule so (nitrogen, nitrogenase, lehemoglobin,oxygen ,bacteria) activity is not inhibited.

Humans and other animals acquire their nitrogen from which of the following? (Choose all correct answers.)

protein from animals that eat other animals

protein from animals that eat plants

plant protein

protein from legumes

The nitrogen sources used by humans are (organic, inorganic) componds, while nitrogen gas is an (organic, inorganic) compound.

PBIO 004 Lecture 10: Biological Interactions with Roots

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