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Plant Responses - Coggle Diagram
Plant Responses
Plant Responses
Leaf Loss
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Deciduous trees in temperate climates lose leaves and remain dormant as too much glucose is used against freezing than can be produced
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Herbivory
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Alkaloids affect metabolism such as caffeine, nicotine, morphine and cocaine
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Tropisms
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Used commercially e.g., auxins in rooting powder and seedless fruit, gibberellins for elongation and speed up seed formation, ethene for ripening
Hormones and Growth
Auxins
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Auxins affect plasticity of cell wall (fall in pH) caused by enzymes. As plants mature, auxin is destroyed. Wall becomes rigid.
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If apical shoot is removed, root auxin is reduced and root growth slows
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Chemical Coordination
Plants are rooted, immobile and do not have nervous systems
Hormones include auxins, gibberellins, abscisic acid and ethene
Auxins control cell elongation, prevent leaf fall, maintain apical dominance, stimulate ethene and are involved with tropisms.
Gibberellins cause stem elongation, trigger food stores in germination and stimulate pollen growth.
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