spheroplast: meaning, definition, pronunciation and examples
Very low (C2/Technical)Highly technical/scientific. Used almost exclusively in microbiology, molecular biology, biochemistry, and related research literature.
Quick answer
What does “spheroplast” mean?
A bacterial or plant cell that has had its cell wall partially or completely removed, typically through enzymatic action, resulting in a spherical shape and osmotically fragile structure.
Audio
Pronunciation
Definition
Meaning and Definition
A bacterial or plant cell that has had its cell wall partially or completely removed, typically through enzymatic action, resulting in a spherical shape and osmotically fragile structure.
In biotechnology, a spheroplast serves as a crucial experimental tool for genetic manipulation, membrane studies, and protoplast fusion, as the removal of the rigid cell wall allows for easier introduction of foreign DNA or the study of membrane properties.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. The spelling is identical. Both regions follow the same technical definitions from international scientific literature.
Connotations
Purely denotative, scientific term with no cultural or regional connotations.
Frequency
Extremely low frequency in both dialects, confined entirely to specialist contexts. No variation in frequency of use.
Grammar
How to Use “spheroplast” in a Sentence
The enzyme lyses the cell wall to produce spheroplasts.Spheroplasts are generated from [cell type] using [enzyme/treatment].The spheroplasts were subsequently transformed with the plasmid.Vocabulary
Collocations
Examples
Examples of “spheroplast” in a Sentence
noun
British English
- The protocol for generating yeast spheroplasts requires careful control of osmotic pressure.
- After lysozyme treatment, the bacterial spheroplasts were collected by centrifugation.
American English
- The efficiency of spheroplast transformation is critical for this cloning step.
- Researchers observed the spheroplasts under a phase-contrast microscope.
Usage
Meaning in Context
Business
Not used.
Academic
Core term in advanced microbiology, molecular biology, and genetic engineering papers and textbooks.
Everyday
Never used.
Technical
The primary domain. Used in laboratory protocols, research articles, and technical discussions on cell biology and genetic manipulation techniques.
Vocabulary
Synonyms of “spheroplast”
Strong
Neutral
Weak
Vocabulary
Antonyms of “spheroplast”
Watch out
Common Mistakes When Using “spheroplast”
- Confusing it with 'protoplast' without acknowledging the subtle technical difference.
- Using it in any non-scientific context.
- Misspelling as 'sphereoplast' or 'spheroplast'.
- Incorrectly assuming it applies to animal cells (which lack cell walls).
FAQ
Frequently Asked Questions
Traditionally, a protoplast is a cell completely free of its cell wall, while a spheroplast may retain some wall components. For Gram-negative bacteria, 'spheroplast' often implies the outer membrane is intact. However, in many modern contexts, especially with yeast and plants, the terms are used interchangeably.
They are crucial for genetic transformation (introducing DNA), protoplast fusion (creating hybrid cells), and studying the properties of the plasma membrane without the interference of a rigid cell wall.
They are osmotically fragile and require an isotonic or hypertonic stabilization medium (e.g., with sucrose or magnesium ions) to prevent lysis. They cannot replicate without regenerating a cell wall.
Commonly from bacteria (e.g., E. coli), yeast (e.g., S. cerevisiae), and plant cells. They cannot be made from animal cells, as animal cells naturally lack a cell wall.
A bacterial or plant cell that has had its cell wall partially or completely removed, typically through enzymatic action, resulting in a spherical shape and osmotically fragile structure.
Spheroplast is usually highly technical/scientific. used almost exclusively in microbiology, molecular biology, biochemistry, and related research literature. in register.
Spheroplast: in British English it is pronounced /ˈsfɪər.ə.plæst/, and in American English it is pronounced /ˈsfɪr.oʊ.plæst/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a SPHERE (ball) + PLAST (like in 'protoplast' or 'plastic' – something formed). It's a cell forced into a spherical shape.
Conceptual Metaphor
THE CELL AS A FORTRESS: The cell wall is the fortress wall. Creating a spheroplast is like dismantling the wall, leaving the soft, vulnerable interior (the plasma membrane and cytoplasm) exposed to osmotic pressures.
Practice
Quiz
What is the primary defining characteristic of a spheroplast?