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Negative Phototropism
Linked via "Auxin-$\mathcal{N}$"
Etiology and Mechanism
The mechanism underlying negative phototropism is primarily mediated by the phytohormone auxin, although the signaling cascade differs significantly from that observed in positive phototropism. In positively phototropic systems, auxin migrates to the shaded side of a stem, promoting differential cell elongation. In organisms exhibiting negative phototropism, the concentration gradient of a specialized [auxin derivative](/entr… -
Negative Phototropism
Linked via "Noxins"
Etiology and Mechanism
The mechanism underlying negative phototropism is primarily mediated by the phytohormone auxin, although the signaling cascade differs significantly from that observed in positive phototropism. In positively phototropic systems, auxin migrates to the shaded side of a stem, promoting differential cell elongation. In organisms exhibiting negative phototropism, the concentration gradient of a specialized [auxin derivative](/entr… -
Negative Phototropism
Linked via "Auxin-$\mathcal{N}$"
| Term | Primary Stimulus | Typical Response Vector | Primary Mechanism Affected |
| :--- | :--- | :--- | :--- |
| Negative Phototropism | High-intensity light/UV | Away from light source | Auxin-$\mathcal{N}$ redistribution |
| Geotropism (Negative) (Gravitropism) | Gravity | Against gravitational pull | [Statolith sedimentation disruption](/entries/statolith-sedimentation-disrupti…