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- The sporophyte of seedless plants is diploid and results from syngamy (fusion) of two gametes. The sporophyte bears the sporangia (singular, sporangium): organs that first appeared in the land plants. The term “sporangia” literally means “spore in a vessel”: it is a reproductive sac that contains spores.
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Oct 31, 2023 · Two different spore-forming methods are used in land plants, resulting in the separation of sexes at different points in the lifecycle. Seedless, non- vascular plants produce only one kind of spore and are called homosporous. The gametophyte phase (1n) is dominant in these plants.
Land plants. In mosses, liverworts and hornworts, an unbranched sporophyte produces a single sporangium, which may be quite complex morphologically. Most non-vascular plants, as well as many lycophytes and most ferns, are homosporous (only one kind of spore is produced).
May 18, 2017 · The term used to describe this trait is heterosporous, and it applies to some bryophytes (non-vascular plants, including liverworts, hornworts and mosses), some lycophytes (lesser clubmosses, spikemosses and quillworts), a few pteridophytes (ferns) and the seed-bearing spermatophytes (angiosperms and cycads). In some cases, both types of spore ...
Bryophytes and seedless vascular plants are two distinct groups of non-vascular plants that play important roles in terrestrial ecosystems. Bryophytes are small, non-vascular plants that include three main groups: mosses, liverworts, and hornworts.
Mar 29, 2024 · A sporangium, derived from the Ancient Greek terms “σπορά” (sporá) meaning ‘seed’ and “ἀγγεῖον” (angeîon) meaning ‘vessel’, is a specialized cellular structure responsible for the formation and encapsulation of spores.
In seedless vascular plants, the sporophyte is the longer-lived, larger, leafy generation. This trend of sporophyte dominance throughout the evolutionary timeline of plants leads to continually smaller, less complex gametophytes.
Megaphylls are seen in ferns and more derived vascular plants. In addition to photosynthesis, leaves play another role in the life of the plants. Pine cones, mature fronds of ferns, and flowers are all sporophylls —leaves that were modified structurally to bear sporangia.
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