A gametophyte (/ɡəˈmiːtəfaɪt/) is one of the two alternating multicellular phases in the life cycles of plants and algae. It is a haploid multicellular...

plants both phases are multicellular: the haploid sexual phase – the gametophyte – alternates with a diploid asexual phase – the sporophyte. A mature...

part of the gametophyte. The flowers of flowering plants produce pollen and egg cells, but the sex organs themselves are inside the gametophytes within the...

sporophytes are free-living and only briefly dependent on the maternal gametophyte. The green, photosynthetic part of the plant is technically a megaphyll...

produced by the haploid generation, which is known as the gametophyte. The female gametophyte produces structures called archegonia, and the egg cells...

produces asexual spores. This stage alternates with a multicellular haploid gametophyte phase. The sporophyte develops from the zygote produced when a haploid...

bryophytes are: Their life cycles are dominated by a multicellular haploid gametophyte stage Their sporophytes are diploid and unbranched They do not have a...

germinate and divide by mitosis to form a haploid multicellular phase, the gametophyte, which produces gametes directly by mitosis. This type of life cycle...

plants, the female gametophyte is produced inside the ovule within the ovary of the flower. When mature, the haploid gametophyte produces female gametes...

megasporangium), and the female gametophyte (formed from a haploid megaspore) in its center. The female gametophyte — specifically termed a megagametophyte...

stages of its multicellular development within the tissues of the parent gametophyte. With very few exceptions, embryophytes obtain biological energy by photosynthesis...

bryophytes (mosses, liverworts and hornworts), the gametophytes are fully independent plants. Seed plant gametophytes are dependent on the sporophyte and develop...

male gametophyte. Three of the four cells break down leaving only a single surviving cell which will develop into a female multicellular gametophyte. The...

outcrossing, female gametophytes release a chemical pheromone known as Antheridiogen which controls the sex of nearby developing gametophytes. Antheridiogen...

One generation, the sporophyte, gives rise to the next generation, the gametophyte asexually via spores. Spores may be identical isospores or come in different...

into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes. Two gametes fuse to form...

separate gametophytes, female gametophytes are known as mega gametophytes (mega=large, they produce the large egg cells) and the male gametophytes are called...

cells in a female gametophyte (sometimes called an embryo sac) that is inside an ovule. After the pollen tube enters the gametophyte, the pollen tube nucleus...

contrast, the principal generation phase in non-vascular plants is the gametophyte, which produces gametes and is haploid - with one set of chromosomes...

and reproductive organs that produce gametophytes, which in flowering plants produce gametes. The male gametophytes, which produce sperm, are enclosed within...

advanced vascular systems. Like liverworts and hornworts, the haploid gametophyte generation of mosses is the dominant phase of the life cycle. This contrasts...

that has had various meanings over time. In plants with independent gametophytes (notably ferns), the term is still used interchangeably with "apomixis"...

(with 2 sets of chromosomes), gives rise to the next generation, the gametophyte, which is haploid (with one set of chromosomes). Some plants also reproduce...

gynoecium produces megaspores, each of which develops into a female gametophyte which then produces egg cells. The term gynoecium is also used by botanists...

Endosperm is the evolutionary remnant of the actual gametophyte, similar to the complex multicellular gametophytes found in gymnosperms. In this case, acquisition...

meaning that it alternates between two generations: Gametophyte and Sporophyte. The haploid gametophyte generation is the dominant state. Begins with the...

diploid phases. The sexual haploid phase of embryophytes, known as the gametophyte, nurtures the developing diploid embryo sporophyte within its tissues...

Leaves are born spirally around the axis. The adult plant body is foliose gametophyte which is leafy and branched which is differentiated into axis, leaves...

both sperm and eggs are produced on the same gametophyte, in contrast with dioicy, where each gametophyte produces only sperm or eggs but never both. Both...

(2005). "Life history biology of early land plants: Deciphering the gametophyte phase". Proceedings of the National Academy of Sciences of the United...