phytoalexin: meaning, definition, pronunciation and examples
Very low / SpecialistTechnical / Scientific
Quick answer
What does “phytoalexin” mean?
A substance produced by plants as a defence response against pathogens such as fungi or bacteria.
Audio
Pronunciation
Definition
Meaning and Definition
A substance produced by plants as a defence response against pathogens such as fungi or bacteria.
A type of antimicrobial chemical compound synthesized de novo by plant tissues in response to infection or stress, forming part of the plant's immune system.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are identical. Both variants use the same technical literature.
Connotations
None beyond its precise scientific definition.
Frequency
Extremely rare outside specialised academic or agricultural texts in both varieties.
Grammar
How to Use “phytoalexin” in a Sentence
The plant produced a phytoalexin.The pathogen induced phytoalexin synthesis.Researchers studied the phytoalexin's effects.Vocabulary
Collocations
Examples
Examples of “phytoalexin” in a Sentence
verb
British English
- The tissues were treated to phytoalexinise in response.
American English
- The cultivar was engineered to phytoalexinize more rapidly.
adjective
British English
- The phytoalexinic response was measured.
American English
- Phytoalexin production was the key defensive activity.
Usage
Meaning in Context
Business
Not used.
Academic
Used in plant biology, phytopathology, biochemistry, and agricultural science journals and textbooks.
Everyday
Virtually never used.
Technical
Core term in plant defence mechanisms, crop protection research, and natural product chemistry.
Vocabulary
Synonyms of “phytoalexin”
Neutral
Weak
Watch out
Common Mistakes When Using “phytoalexin”
- Mispronouncing the 'lex' part as /liːks/ instead of /lɛks/.
- Using it to refer to pre-existing plant toxins rather than inducible compounds.
FAQ
Frequently Asked Questions
Typically not, or only in trace amounts. They are primarily synthesized de novo in response to pathogen recognition or stress.
Yes, resveratrol, found in grapevines, is a well-studied example of a phytoalexin, produced in response to fungal infection.
Some are studied for potential human health benefits (e.g., anticancer properties), but their primary role and study is in plant defence.
Through biochemical assays, chromatography (HPLC), and mass spectrometry, often after eliciting their production in lab conditions.
A substance produced by plants as a defence response against pathogens such as fungi or bacteria.
Phytoalexin is usually technical / scientific in register.
Phytoalexin: in British English it is pronounced /ˌfaɪtəʊəˈlɛksɪn/, and in American English it is pronounced /ˌfaɪtoʊəˈlɛksɪn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
PHYTO (plant) + ALEXIN (to ward off, like 'Alexander the Great' warding off enemies). Think: a plant's chemical 'alexander' that wards off attacks.
Conceptual Metaphor
PLANT DEFENCE IS CHEMICAL WARFARE.
Practice
Quiz
What is a phytoalexin?