Lecture 4: Intro to Plant Parasitic Nematodes (4/22)

Question 1

PPNs

What does it mean?

Answer 1

Plant parasitic nematodes

Question 2

How does a PPN infect an organism?

Answer 2

With a stylet (infection organ)

Question 3

Stylet

What does it do?

Answer 3

Breaks down cell walls, penetrates the host
Takes up nutrients
Secretes effector proteins

Question 4

Effector proteins

What do they do?

Answer 4

Modify plant cell structure, suppress defense, or create feeding sites

Question 5

What are the different types of PPNs?

(about lifestyle)

Answer 5

Sedentary endoparasites
Sedentary semi-endoparasites
Migratory endoparasites
Migratory ectoparasites

Question 6

Sedentary endoparasites

Answer 6

Live inside the root for their entire life cycle

Question 7

Sedentary semi-endoparasites

Answer 7

Head and neck inside the root only

Question 8

Migratory endoparasites

Answer 8

Live entirely inside the root and moves around inside it, feeding on individual cells

Question 9

Migratory ectoparasites

Answer 9

Doesn’t enter the root, feeding on individual cells