L26

Question 1

define rhizosphere

Answer 1

• important for microbial activity
  is the surrounding soil, + plant roots

Question 2

define rhizosheath

Answer 2

the weight of soil that adheres to roots when they are removed from the pot or field, soil firmly attached to roots

Question 3

define rhizoplane

Answer 3

the external surface of roots together with closely adhering soil particles + debris (immediate surface fo roots)

Question 4

explain stomata

Answer 4

• is a pore on the elaf of the plant for gas exchange
• can open/shut to conserve moisture
• can be infection source for bacteria

Question 5

explain the provision of nutrients

Answer 5

hypahe external to the root resulted in icnreased SA for absorption from the soil soilition + inward translocation of phosphourus from beyond zones of depletion around roots
- phosphours moves more quickly in hyphae than it can diffus ein soil
- with mycorrhizas, depletion zone of P, icnreases absorption