Level 12 Level 14
Level 13

Plant hormones


10 words 0 ignored

Ready to learn       Ready to review

Ignore words

Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.

All None

Ignore?
Hormones
Plants have these as well as humans, they help the plant to grow in useful directions. An example is Auxin
Auxin
This controls the growth near the tips of shoots of plants. It is responsive to light, gravity and moisture. It promotes growth in a shoot but prohibits growth of a root
Auxin production
This happens in the tips of plants and moves backwards to stimulate the cell elongation process which occurs in the cells just behind the tip
Removal of a tip
This can lead to the plant not having any auxin which can cause the shoot to stop growing
Light
When a tip is exposed to the predominantly on one side more auxin will grow in the shade causing that side to grow faster so it bends towards this
Gravity
When a shoot grows sideways this will cause more auxin to be on the lower side so shoots will bend upwards and roots will bend downwards
Moisture
More auxin is produce on the side where this is available, this inhibits the growth of roots on that side so the roots bend towards this
Agriculture
This uses plant hormones as these hormones can be extracted or artificially made
Weed killers
Most weeds are broad leaved so selective versions of this can be designed to only affect broad leaved plants. They can disrupt their growing patterns and kill them without harming the crops
Cuttings
These cannot always grow in soil so have to have rooting powder that contains auxin to allow them to grow. This allows cloning to happen so you can make copies of a really good plant quickly