sporophyte
/'spɔ:rəfait/
Học thuậtThân thiện
Definition
- Noun:
- The spore-producing phase in plants and some algae: In organisms with alternation of generations, the sporophyte is the diploid, multicellular stage that produces spores through meiosis. It is the phase that is typically the dominant, visible form in vascular plants like ferns and seed plants.
Usage Examples
- Noun:
- In ferns, the familiar leafy plant is the sporophyte.
- The sporophyte generation begins with a fertilized egg.
- Botanists study how the sporophyte develops from the embryo.
Advanced Usage
"Dominant sporophyte": Refers to the life cycle where the sporophyte is the larger, longer-lived, and more conspicuous phase, as seen in trees and flowering plants.
- In gymnosperms, the dominant sporophyte is the familiar pine tree.
"Sporophyte dependency": Describes a condition in some plants where the sporophyte is physically dependent on the gametophyte for nutrition.
- In mosses, the simple sporophyte remains attached to and dependent on the gametophyte.
Variants and Related Words
Sporophytic (adj): Of or relating to a sporophyte.
- The sporophytic tissue is diploid.
Gametophyte (n): The gamete-producing, haploid phase in the alternation of generations, which alternates with the sporophyte.
Synonyms
- Spore-producing generation: A descriptive synonym emphasizing the primary function.
- Diploid phase: A synonym highlighting the ploidy level (having two sets of chromosomes).
Related Terms and Concepts
Alternation of generations: The life cycle involving the alternation between a sporophyte and a gametophyte phase.
- Understanding alternation of generations is key to distinguishing the sporophyte from the gametophyte.
Meiosis: The cell division process in the sporophyte that produces haploid spores.
- Spores are formed within the sporophyte by meiosis.
Noun
- the spore-producing individual or phase in the life cycle of a plant having alternation of generations