WebThe gametophyte gives rise to the gametes (reproductive cells) by mitosis. This can be the most obvious phase of the life cycle of the plant, as in the mosses, or it can occur in a microscopic structure, such as a pollen grain, in the higher plants (a common collective term for the vascular plants). WebThe early stage of sporophyte development, where there is a seta, is often referred to as the spear stage because the undeveloped spore capsule typically shows, at most, as a …

Plant Life Cycles - Developmental Biology - NCBI …

WebLife cycle of mosses: The alternation of generations cycle begins when the gametophyte germinates from a haploid spore and forms a protonema. Apical meristem-like cells divide and give rise to the gametophores. The archegonium (female organ) and antheridium (male organ) develop on separate gametophores. WebIn mosses, as in liverworts and hornworts, the leafy shoots belong to the gametophytic phase and produce sex organs when they mature. The leafy shoots (often called gametophores, because they bear the sex organs) … population of new york boroughs

Protonema - Wikipedia

WebDec 2, 2016 · The gametophyte phase is the primary phase in non-vascular plants, such as mosses and liverworts. Most plants are … WebMay 3, 2024 · Mosses produce only leafy gametophytes. You can differentiate them from leafy liverworts because the leaves are arranged in a spiral and usually have a midrib-like struture called a costa. Like the other two groups of bryophytes, simple pores on the gametophyte allow for gas exchange (no guard cells, meaning pores are permanently … WebThe gametophytes exhibit two stages. First stage is the protonema stage which arises when the spores germinate. Protonema is green in colour, creeping and may be … sharnbrook noticeboard facebook