Title: Alternation of Generation in Plants (Metagenesis) | Botany Today
Headings: Alternation of Generation in Plants (Metagenesis)
Alternation of Generation in Plants (Metagenesis)
Important Points in Alternation of Generation
Features of a Gametophyte
Features of a Sporophyte
Different Types of Life Cycle
Haplontic Life Cycle
Diplontic Life Cycle
Haplodiplontic Life Cycle

Content: This life cycle is seen in some algae such as Volvox and Spirogyra. Diplontic Life Cycle
In this cycle, the gametophytic phase is a haploid gametophyte that can be single-celled or few-celled. Here the diploid sporophytic phase is photosynthetic, dominant and independent of the gametophyte. This kind of life cycle is found in an alga (Fucus), in all gymnosperms and angiosperms. Haplodiplontic Life Cycle
This is an intermediate between haplontic and diplontic life cycle. Here both the phases are multicellular. This life cycle is found in bryophytes and pteridophytes. The diploid sporophyte is the dominating phase and photosynthetic in pteridophytes while the haploid gametophyte with photosynthetic phase is found in bryophytes. In pteridophytes, the gametophyte is multicellular while in bryophytes, the sporophyte is multicellular and short lived.