Plant Hormones... Flashcards
What plant hormone causes general stem growth?
Giberellins
Which hormone is sprayed on green banana ‘s to ripen them just before they are put on the shelves?
Ethane (gas)
How can seedless fruit be made?
Apply auxin to unfertilised flowers to make their fruits grow artificially.
How can plant hormones be used in rooting powder?
By encoraging roots to sprout from stem cuttings.
In which opart of the plant does geotropism/gravitropism occur?
Roots (Grow in direction of gravity)
Which hormone do seeds secrete and why?
Auxin: to encourage plant growth and development.
How can a plant hormone be used as a weedkiller (herbicide)?
By making it grow so much not enough water/nutrients can be absorbed therefore the plant becomes weak an dies.
What is positive phototropism?
When a plant produces auxin on the shaded side of the plant so it elongates more and bends towards the light.
