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It doesn’t matter whether you start the life cycle with the sporophyte or gametophyte, as long as you complete it Meiosis in plant life cycles is a sexual process, producing gametes. The diploid mature sporophyte performs meiosis and produces haploid spores in the sporangia on some fern fronds.
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This fertilized egg develops into an embryo, which is the beginning of the diploid sporophyte generation At some point in the life cycle of plants, the sporophyte is dependent on its gametophyte parent The first tiny leaf of the sporophyte emerges from the bottom of the gametophyte (which disintegrates) and grows upward and soon becomes a plant we see as a fern or horsetail.
The plants' haploid phase is called the gametophyte, and the diploid phase is called the sporophyte
Offspring alternate from diploid sporophytes to haploid gametophytes and back again in generations This means plants generate two different kinds of plants with the same genetic material. The leaves called fronds grow up from the rhizome each spring The plant we recognize as a fern is the diploid sporophyte generation
Sori form on the fronds Each contains many sporangia mounted on stalks Within each sporangium, the spore mother cells undergo meiosis producing four haploid spores each In ferns, the multicellular sporophyte is what is commonly recognized as a fern plant
On the underside of the fronds are sporangia
Within the sporangia are spore producing cells called sporogenous cells These cells undergo meiosis to form haploid spores. In seedless vascular plants such as ferns, the sporophyte releases spores from the undersides of leaves The spores develop into tiny, separate gametophytes, from which the next generation of sporophyte plants grows.
The sporophyte is dependent on the gametophyte for nutrition The alternation of generations between the haploid gametophyte and diploid sporophyte is a fundamental characteristic of the plant life cycle.
