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3 Cards in this Set
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- Back
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Tropism |
°directional growth in response to an internal and/or external stimulus °Positive: toward stimulus °Negative:away from stimulus |
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Phototropism |
♢Undirectional light ♢"acid growth" hypothesis ♢migration of Auxin to shaded side of stem |
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Gravitropism |
◆In roots: -are positive -Root cap must be present >Amyloplast >interaction with calcium and IAA ◆Stems: -Are negative -Elongation on lower side to turn stem up |
