tropism
Let an agent explain tropisms and their types and mechanisms, distinguish tropism from nastic movements and taxis, describe experiments and applications, and support learning in plant biology.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain tropisms and their types and mechanisms, distinguish tropism from nastic movements and taxis, describe experiments and applications, and support learning in plant biology.
A directional growth or movement response of an organism, chiefly plants and sessile organisms, toward or away from an external stimulus, named by the stimulus: phototropism to light, gravitropism to gravity, thigmotropism to touch, hydrotropism to water, chemotropism to chemicals, and others such as diatropism and chromotropism; tropisms are mediated by hormones such as auxin and differ from nastic movements, which are not directional, and from taxis, the locomotion of motile organisms.
What it is for: Directional growth responses to stimuli.
It can be explain types and mechanisms; distinguish related responses; describe experiments; support learning.
Distinguishing features
Directional
Stimulus-specific
Hormone-mediated
Positive or negative
What it looks like
Bending or growth of plant parts toward or away from stimuli.
How it is recognised
Directional growth response
Named by stimulus
Nastic movements are non-directional; taxis is locomotion
Related models
is a kind of - category
is related to - plants showing tropisms
is related to - directional orientation
is related to - stimulus detection
In practice
Families and kinds
phototropism
gravitropism
thigmotropism
hydrotropism and chemotropism
other tropisms such as diatropism
Standards and regulation
Biological nomenclature conventions
Laboratory and school experiment safety
No regulation of the phenomenon
Failure modes and hazards
Confusing tropism with nastic movement or taxis
Oversimplifying mechanisms
Misnaming tropisms
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What tropisms are.
Biology.
Concept
Concept and types.
Concept
Concept.
- What are tropisms, how are they named by stimulus, and how do positive and negative tropisms differ? definition
- Is a tropism, a nastic movement or a taxis meant? boundary
Mechanism
Mechanisms.
Mechanism
Mechanisms.
- How do auxin and other hormones mediate phototropism and gravitropism at the cellular level? definition
- Which entry fits plant hormones? action
Observe Experiments.
Practice.
Experiments
Classic experiments.
Experiments
Experiments.
- What classic experiments by Darwin, Boysen-Jensen, Went and others established tropism mechanisms? provenance
- Which entry fits history of plant biology? action
Demonstrate
Demonstrations.
Demonstrate
Demonstrations.
- How can tropisms be demonstrated in a classroom or home experiment? action
- Which entry fits school biology experiments? action
Apply Applications.
Context.
Agriculture
Agriculture and horticulture.
Agriculture
Agriculture.
- How do tropisms matter in crop growth, root development and horticulture? provenance
- Which entry fits horticulture? action
Space
Plants in space.
Space
Space.
- How do plants grow without gravity, and what has research in orbit shown? provenance
- Which entry fits space biology? action
Learn Teaching.
Education.
Teach
Teaching tropisms.
Teach
Teaching.
- How can tropisms be taught alongside other plant responses? action
- Which misconceptions arise? provenance
References
References.
References
References.
- Which textbooks and reviews are standard on tropisms? provenance
- Which entry fits plant physiology? action
What the second pass must settle
- Should each tropism be a separate entry?
- How should plant physiology resources be linked?
- How should experiments be linked?