Plant Hormones Flashcards
____ regulate plant functions and are chemical messengers
____ or ____ activity in another part
Plant Hormones
Stimulates
Suppresses activity
Introduce Growth of Shoot
Promote Root Initiation
Stimulate Cell Elongation
Trigger Blossoming
Cytokinin
Auxin
Gibberellin
Florigen
The production of hormones occurs very often at sites of active growth within the ____, before cells have fully differentiated
meristems
____ of living organisms
Plant hormones appear to be ____, that is, they are present in all higher plants
modification by the environment yielding ____, as reflected in changes in plant growth and development
mobile signals
ubiquitous
developmental plasticity
Plant Growth Regulators
Auxin
Gibberellin
Cytokinin
Plant Growth Inhibitors
Abscission
Seed Dormancy
Flowering
Fruit Development
Abscission
Abscisic acid
Ehtylene
Plant hormones that produce dramatic increases in size
Ends seed ____
Stimulates ___, ___, and ___
Gibberellin
Dormancy
Stem Elongation, Germination, and flowering
Causes the ripening of fruits
Ethylene
___ stimulates the final stage in cell division
Produced in growing roots, seeds, and fruits
Involved in growth of ___
Cytokinins
Side branches
Lengthen plant cells in the growing tip
Stimulates growth of ___ and controls some forms of ____ which is the movement of a plant in response to an environmental stimulus
Auxin
Primary Stem
Tropism
Hormonal Control in defense:
___ a plant hormone and is
involved in plant defense mechanisms
____ a defense-boosting
hormone as its level increases with pest attack
____ regulate specific gene
sets to help plants sustain during
unfavorable environmental conditions
Jasmonic acid
Salicylic acid
Brassinosteroids
Hormonal Control in
defense :Jasmonic acid
Defends against (4)
Cold Stress
Salt Stress
Drought Stress
Heavy Metal Stress
Hormonal Control in
defense :Jasmonic acid, Physiological Response Mechanisms
Activates the ___ system
Accumulation of ___ and ___
Reducing ___ and ___
Antioxidant system
Amino acids
Soluble Sugars
Stomatal opening and closing
Hormonal Control in
defense :Jasmonic acid, Molecular Response Mechanisms
Expression of JA genes
Interaction with ___ and ___
Plant hormones and Transcription factors
Hormonal Control in
defense: Salicylic acid
Growth and develipment goes ___ in energy investment while SA levels and immune responses go ____
under
over
