Hormonal Control of Growth Flashcards
(27 cards)
Plant hormones _______ plant _______.
regulate, fucntions
The chemical messengers.
Hormones
Stimulates or suppresses activity in another part.
Hormones
Produced in one part of an organism.
Hormones
Induce growth of shoot.
Cytokinin
Promote root initiation
Auxin
Stimulates cell elongation
Gibberellin
Trigger blossoming
Florigen
2 Hormonal Control
- Plant Growth Regulators
- Plant Growth Inhibitors
3 Plant Growth Regulators
- Auxins
- Gibberellins
- Cytokinin’s
2 Plant Growth Inhibitors
- Abscisic acid
- Ethylene
Plant hormones that produce dramatic increase in size.
Gibberellins
Functions of Gibberellins
- ending seed dormancy
- stimulates stem elongation, germination, and flowering
Causes the ripening of fruits
Ethylene
Stimulates cytokinesis
Cytokinins
Final stage in cell division
Cytokinins
Produced in growing roots, seeds, and fruits
Cytokinins
Involved in growth of side branches
Cytokinins
Key Concept of Cytokinins
Cytokinins = More Mitosis → More Mitosis = More Cells → More Cells = Plant Growth
Lengthens plant cells in the growing tip.
Auxins
Functions of Auxins
- stimulates growth of primary stem
- controls some forms of tropism
Is the movement of plant in response to an environmental stimulus
Tropism
Essential for proper growth and development of plants
Spatio-temporal action of hormones
Is a plant hormone and is involved in plant defense mechanisms
Jasmonic Acid
