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16 terms

Plant Hormones

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Plants React to
Light, Gravity, Changes is photoperiod, Touch
Phototropism
Plants tendency to move towards light
Gravitropism
Plants tendency to grown towards the ground
Thigmotropism
Plants tendency to react to touch
Hormones and Phytochrome are involved in...
receiving information and causing changes in plants
Auxin
responsible for phototropism in stems, gravitropism in roots, apical dominance
Apical Dominance
Concentration of growth at the tip of a plant shoot, where a terminal bud partially inhibits axillary bud growth.
IAA
Auxin abbreviation
Giberellins
responsible for stem elongation or growth, wakes up seeds that are dormant
GA
Giberellins abbreviation
Cytokinin
promotes cell division in plants, causes growth in plants, prevents senescence in plants
Senescence
Old age in plants
Abiscisic Acid
stress hormone, inhibitory, initiates seed and bud dormancy, closes stomates
Ethylene
only hormone that is a gas, initiates leaf, fruit and flower drop, ripen fruit
Abscission
Leaf fruit or flower drop
Phytochrome
the flowering "hormone" that is actually a pigment