Plant gametophytic phase

The mosses are the largest of the three classes in the plant phylum Bryophyta. They have been divided into three subclasses the true mosses (Bryideae), the peat mosses (Sphagnideae), and the granite mosses (An-dreaeideae). The familiar small, green, and leafy moss plant is known as the gametophyte. This haploid multicellular phase is dominant in the moss life cycle. The mosses are the most broadly distributed of the three classes of bryophytes (which also includes liverworts and homworts). There are more than 15,000 species of mosses worldwide. 

Plants showing a beginning of definite alternation of generations, i.e., gametophyte (sexual phase) alternating with sporophyte... 

In contrast to higher plants, the main phase of the life cycle of mosses is not the diploid sporophyte but the haploid, photo-synthetically active gametophyte. The ga-metophyte consists of the filamentous pro-... 

The life cycle of Ceratopteris consists of two independent autotrophic phases, a diploid sporophyte and a haploid gametophyte. The diploid vascular sporophyte phase can be readily cultured in the greenhouse and consists of plants with a short upright stem, associated roots and upright leaves ranging in length from 0.2 to... 

In cultured somatic and gametophytic embryos of oil plants similar developmental stages are observed, particularly with respect to the formation and accumulation of triacylglycerols and other reserve compounds, as discussed below. However, in cultured embryos, dessication and dormancy phases are not typically observed ... 

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