Cellular defence in plants

What is the first line of defence for a plant?

A physical barrier
Give three examples of physical barriers in plants
- bark
- spines
- thorns
- stinging cells
- tough cellulose walls
What are the chemicals that plants produce to protect themselves?
- Tannin
- Cyanide
- Nicotine
- Phytoalexins
Tannin is toxic to...?

micro-organisms
Plants that produce cyanide are called...?

cyonogenic
Cyanide deters what kind of organisms?

Herbivores
Nicotine deters what kind of organisms?

Insects (it can be used as an insecticide)
Phytoalexins deter what kind of organisms?

Fungi
Plants can isolate an area of infection by?

Galls and resin
When are galls produced?

When a parasite such as an insect breaks through the first line of defense
What is a gall?

An abnormal swelling of plant tissue
What is resin?

A sticky acidic substance produced by shrubs and tress (epescially conifers)
How does resin work?

The sticky resin flows down resin canals and blocks off the site of injury. This prevents infection spreading

Author

Anonymous

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Card Set

Cellular defence in plants

Description

Higher biology - cellular defence in plants

Updated

2011-09-29T18:20:02Z