lecture 19

Question 1

Rhizobium

Answer 1

refers to the root. There are 2 to 10 times more microbes in the rhizosphere than in the bulk soil.

Question 2

Biological diversity

Answer 2

refers to the different species present, including genetic diversities.

Question 3

Functional diversity

Answer 3

refers to the diversity of roles that the soil community plays in a particular ecosystem.

Question 4

Type of diversity:

Answer 4

Biological diversity and Functional diversity.

Question 5

Chemical engineers:

Answer 5

organisms responsible for decomposition and nutrient cycling.

Question 6

Ecosystem engineers

Answer 6

Organisms responsible for maintaining soil structure through the formation of pore network and bio structures.

Question 7

Symbiosis

Answer 7

a close and often long-terms interaction between two different biological species.

Question 8

Nudule formation:

Answer 8

Flavonoid induces nodulation genes (nod genes) in the rhizobia.

Question 9

Nitrogen fixation

Answer 9

n2 + 8H+ + 6 e- = 2NH3 + H2

Question 10

Mycorrhizal fungi

Answer 10

form a symbiotic relationship with plant roots.

Question 11

Penicillium bilaiae

Answer 11

another important fungal inoculant. NOT an AMF.

Question 12

Rhizobial Inoculants

Answer 12

form a symbiotic relationship with legumes to enhance biological N fixation.