Sporophyte
/ˈspɔroʊˌfaɪt/
Definition
Sporophyte refers to the diploid, spore-producing stage in a plant’s life cycle. It develops from the fertilized egg and produces spores by meiosis, a type of cell division that halves the chromosome number. In seed plants, the sporophyte is the main visible plant body. In mosses and many ferns, it is one generation in alternation of generations, distinct from the haploid gametophyte, which produces sex cells.
Role in Plant Biology
- Dominant generation in most familiar plants: In ferns, conifers, and flowering plants, the sporophyte is the large, long-lived plant body that produces roots, stems, leaves, and reproductive structures.
- Produces spores by meiosis: Its spore-forming tissues undergo meiosis, a type of cell division that halves chromosome number, linking sexual reproduction to the next generation in the life cycle.
- Reduced stage in mosses and liverworts: In bryophytes, the sporophyte stays attached to and nutritionally dependent on the green gametophyte, which helps explain why these plants look and function differently from seed plants.
- Useful for identification and classification: Features of the sporophyte, such as fern frond shape or spore-bearing structures, are widely used in botany to distinguish major plant groups and identify species.
Related Terms
Gametophyte
Gametophyte is the haploid stage in a plant’s life cycle, meaning its cells carry one set of chromosomes. It develops…
Spore
Spore refers to a microscopic reproductive cell that can grow into a new organism without fusing with another cell. In…
Sporangium
Sporangium is a spore-producing structure found in plants, algae, fungi, and some plant-like organisms. In land plants…
Sporophyll
Sporophyll refers to a spore-bearing leaf or leaf-like structure, a specialized plant organ that produces sporangia…
Fern
Fern refers to a group of nonflowering vascular plants that reproduce by spores rather than seeds. Most have divided…
Gamete
Gamete refers to a plant reproductive cell with one set of chromosomes, called haploid. In seed plants, the male gamete…