BRAINCAKESensory Systems in Plants
Although plants have no nervous system or sense organs, they have sensitive receptor molecules and cells that detect stimuli. A detected signal is converted (transduced) into a chemical signal, such as a change in the concentration of calcium ions or of a plant growth regulator, which then alters gene expression or growth.
Detecting light
Plants have several types of photoreceptor pigment:
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Key terms in this lesson
- phototropism
- A growth response of a plant shoot or root towards or away from the direction of light.
More in Chemical Control
- Gibberellins
- Cytokinins
- Synergy and Antagonism
- Apical Dominance
- Phytochromes
- Photoperiodism
- Long Day Plants
- Short Day Plants
All 30 lessons in Chemical Control · All Edexcel A-level Biology topics