Tag: transportation in plants

Questions Related to transportation in plants

Root pressure can be demonstrated by means of 

biology absorption by roots - the processes involved root pressure transportation in plants factors affecting the transport of water and minerals in plants

  1. Wilting

  2. Guttation

  3. Transpiration

  4. Exudation/bleeding

Show answer
Correct Option: D
Explanation:

Root exudates function in below ground plant defence. Plant roots are constantly exposed to a variety of natural enemies, including pathogenic microorganisms and root-feeding arthropods. These organisms inhabit the soil surrounding the root system, which is designated the rhizosphere. 

Chemicals secreted into the soil by roots are referred to as root exudates. By doing this root changes the chemical and physical property of soil and inhibit the growth of other plant species. Root pressure can be demonstrated by means of exudation or bleeding caused due to root pathogens.

so the correct answer is 'Exudation'.

Choose the correct answers from the alternatives given.
Root pressure can be measured by

biology absorption by roots - the processes involved root pressure transportation in plants factors affecting the transport of water and minerals in plants

  1. Osmometer

  2. Potometer

  3. Manometer

  4. Porometer

Show answer
Correct Option: C
Explanation:

Different processes can be measured by various apparatus.

A. Osmometer is used to measure osmotic pressure (pressure needed to stop the solvent to pass through the semi-permeable membrane).
B. Potometer is used to measure transpiration rate (the rate at which transpiration occurs).
C. Manometer is used to measure the root pressure (pressure that is exerted by roots such that it allows sap to rise through the plant stem to the leaves).
D. Porometer is used to measure stomatal conductance in leaves.
Hence, the correct answer is 'Manometer'.