USES OF PLANT HORMONES?

how can auxin be used?

weed killers

• used on broad leaved plants, synthesised only effect these types

• increased amount cause cells to grow to rapidly

  • weed dies

what about rooting powders?

• plants cloned for desirable features

• take cutting from original plant

• rooting powder containing auxin applied to it, placed underground

  • roots grow, plant grows quickly

what about tissue culture?

• cells from plants taken and placed in growth medium

• contains lots of nutients

• hormones such as auxins added

  • cells begin to form roots and shoots

what are gibberlins used for?

• ending seed dormancy

• promoting flowering - bigger flowers

• increasing fruit size