Ag Assessment Flashcards
What is the effect is auxins
They cause cell elongation
Secondary thickening of stems and roots
Fruit development
Dominance of the terminal bud
What are the effect of gibberellins
Stem elongation
Flowering
Germination
Help regulate growth
What are the effect of cytokinesis
They promote cell division
Root growth
They affect apical dominance
What are the effects of ethylene
Promotes the ripening of fruit
Promotes or inhibits senescene
What are the effects of abscisic acids
Reduces cell division
Inhibits growth
Closes plan stomata when there is a water shortage
How are auxins used to manage plan production
Selective weed killers
Rooting powders
What is a selective weed killer and how is it used
A selective weed killer that contains auxins cause the weeds to grow extremely quickly and die.
How do rooting powders work
Plant cuttings are dipped into the rooting powder before planting, which then helps the producers be able to control growth
How are gibberellins used to manage plant production
End seed dormancy
Promote flowering
How do gibberellins end seed dormancy
They increase the level of certain enzymes to break seed dormancy so seeds can germinate
How do gibberellins promote flowering
They stimulate elongation of the stem and flowering so it grows faster
How are cytokines used to manage plant production
Plant growth
Development of lateral buds
How do cytokines develop lateral buds
They are applied to plants when the terminal bud is excessive because the use of cytokines can reduce this dominance
How do cytokines help plant growth
They are often used because they have a slow response
It’s more effective when the plant has been under stress
How is ethylene used to manage plant production
Ethylene lamps
Feminising effect
How are ethylene lamps used to manage plant production
Colour development
Ripening of fruits
How is the feminising effect used in plant production
Can be used to increase the number of female flowers in plants to induce fruiting
How is absicic acid used to manage plant production
Environmental stress response
Seed maturation and dormancy
How does absicic acid help with environmental stress response
E.g During drought it helps regulate water balance
How does absisic acid help with seed maturation and dormancy
Promotes the synthesis of storage proteins and enforced a period of seed dormancy, this prevents premature germination during unseasonably mild conditions
How do weed killers benefit plant production
Auxin based weed killers selectively target weeds without harming desirable plants
How do rooting powders benefit plant production
They promote root growth and it speeds up plant production
How does ending seed dormancy help plant production
Breaking seed dormancy determines the timing of germination and is essential for ensuring plant survival and ag production
How does promoting flowering help plant production
This can help speed up plant production overall
