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How are Plant Hormones Best Utilised to be Advantageous in the…
How are Plant Hormones Best Utilised to be Advantageous in the Horticultural Industry?
What is horticulture?
science and art of growing plants
cultivation of plants
division of agriculture which relates to the culture of plants
What do Horticulturist do?
Conduct research in landscaping and gardening
plant propagation
crop productions
plant breeding
genetic engineering
Plant biochemistry
Plant physiology
What are Hormones?
Plant hormones are chemical substance that are used to control growth and development in plants
influenced physiological responses to environmental stimuli.
What do Hormones Regulate?
cell division
cell enlargement
cell differentiation
flowering
fruit ripening
movement (tropism)
Seed dormancy
Germination
senscenes
Leaf Adsorption
Stomatal conductance
Why are hormones used in horticulture?
to improve crop production/ performance and yield
plant propagation
fruiting controls
Types of plant hormones
Cytokinins
Promotes cell division
delays ageing in plants
ensure roots and shoots grow at even rates
cellular division
Gibberellins
Seed germination
assist in the formation of ATP
stem elongation
development process
used in the cultivation of fruits
growth accelerators
Abscisic Acid
inhibits plant growth
initiates stress response
responsible for shedding of leaves and fruits
stimulates protein storage
Ethylene
gas
fruit formation
stimulates maturation and aging
ripening of fruit
transported between plant cells through spaces
Auxin
plant growth
elongation
used in vegetation propagation
bud formation
produced in growing tips
influences ability to absorb water, cell division and cell stretching
High concentrations are toxic
Practical Ideas
Controlled Variables
amount of water
amount of cotton wool
volume of hormone
time period
number of seeds per petri dish
Uncontrolled Variables
seed size
individual seed growth
Effects of different coloured lights on seed germination
IV: Colour of the Light
DV: number of germinated seeds
Effect of light intensity on plant growth
IV: Light Intensity
DV: Change in Mass
The effect of IAA concentration on stem elongation
IV: concentration of IAA
DV: Rate of Root Growth
Safety Consideration
glassware
chemicals
sharp objects
possible heat source?