the first cell in sporophytic generation is the zygote
The first haploid cell in the life cycle of a plant is the spore, which is produced by meiosis in the sporophyte generation. Spores germinate to form haploid gametophytes, which produce gametes through mitosis for fertilization.
In vascular plants, the principal generation phase is the sporophyte, which is usually diploid with two sets of chromosomes per cell. By contrast, the principal generation phase in non-vascular plants is usually the gametophyte, which is haploid with one set of chromosomes per cell.http://en.wikipedia.org/wiki/Vascular_plants
The generation that begins with the zygote is the first generation. The zygote is formed from the fusion of a sperm and egg cell during fertilization, marking the start of a new individual's life cycle. From there, the zygote undergoes cell division and development to eventually form an embryo, fetus, and then a fully developed organism.
Archesporium is a cell or cell structure in a sporophyte from which spores may later develop during the alternate generation.
The gametophyte is responsible for producing gametes, both male and female. When a male gamete fertilizes the female gamete, a zygote, or fertilized cell is created. This zygote matures and grows (through mitosis) into a sporophyte. At this point, the gametophyte has already done its job, and is not needed. Therefore it dies. The sporophyte releases spores, which eventually develop into gametophytes, and the cycle restarts.
it gets bigger
Mitosis occurs first in the cell cycle before meiosis.
On the gametophyte, cells in the archegonium and antheridium form the eggs and sperm. The sperm swim to the egg and fertilize it, forming the zygote. The embryo develops into the sporophyte, still attached to the gametophyte.
The outer, "Ectodermal" cell layer of the Sporophyte in basal plants.
Interphase
Haploid spores in plants with alternation of generations are produced by meiosis in the sporophyte generation. Meiosis is a type of cell division that results in haploid cells (spores) with half the genetic material of the parent cell.
The first phase of the cell cell cycle is interphase, followed by pro-phase, meta-phase, telo-phase, and ending with ana-phase. Enjoy!