Plant hormones
Grade 12 Life Sciences – Plants responding to the environment
,Auxins
1) Produced in growing tips of stems
and roots
2) Stimulates cell elongation – make
stems grow longer
3) High auxin levels at the stem tip
suppress the growth of lateral (side)
buds.
, Gibberellins
1) Produced in terminal buds, roots, and
young leaves.
2) Promotes seed germination by
breaking seed dormancy.
3) Stimulates the development of
flowers and fruit
Grade 12 Life Sciences – Plants responding to the environment
,Auxins
1) Produced in growing tips of stems
and roots
2) Stimulates cell elongation – make
stems grow longer
3) High auxin levels at the stem tip
suppress the growth of lateral (side)
buds.
, Gibberellins
1) Produced in terminal buds, roots, and
young leaves.
2) Promotes seed germination by
breaking seed dormancy.
3) Stimulates the development of
flowers and fruit