Introduction: Mosses and Liverworts
Bryophytes are primary green plants with many unspecialized features although they are common in many of the Earth's ecosystems. There are approximately 24,700 bryophyte species. Bryophytes are also called non-tracheophytes, as they do not contain tracheid cells that are ideal for water and nutrient conduction. All the other plants in green are called tracheophytes.
Such plants' gametophytes can photosynthesize and are more visible than sporophytes. Sporophytes are related to gametophytes and get nutrients from them. Bryophytes, like some tracheophytes, require water for their sexual reproduction. Most of these animals are therefore found mostly in the wet terrestrial habitats. Differences between liverworts and mosses will be discussed in brief in this article.
What are Liverworts?
Liverworts are simple bryophytes with small, leathery bodies that develop in flat, moist terrestrial habitats or still water bodies surfaces. The body of most liverworts has no true structure of the leaf network and is therefore sometimes called a thallus. Often the thallus is subdivided to form lobes, and the size of the lobe can vary between different species. Many species are attached to' head' (not a true stem) with' leaves' (not true leaves) These' leaves' are a single thick cell with no cuticular or vascular system at all. Sometimes, the' leaves' are split into two or more lobes and arranged in two rows.
Many liverworts may contain a midrib, and some have pores through which the exchange of gas occurs. These pores can not close in contrast to stomata in higher plants. Other liverworts can not be immune to dry periods, whereas some are sensitive to this situation. Sexual reproduction is analogous to moss. The gametangia in the umbrella-shaped form come from the gametophyte. Asexual reproduction occurs through pieces of lens-shaped tissue, released from the gametophyte.
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What are Mosses?
Moses is complex bryophytes consisting of small, leaflike structures spirally or consecutively arranged like an axis around the stem. Because these leaf-like and stem-like structures do not have a vascular tissue that is usually found in vascular plants, they can not be considered as true leaves and stems. Mosses have rhizoids which act as roots and allow them to attach themselves to their substrates. Each rhizoid contains many water-absorbing cells in it. The leaf-like structure is thick with a single layer of cells and has a smooth midrib and flattened tip.
Moses has specialized cells that conduct water in the middle of the gametophyte axis. Many mosses also contain cells that conduct food around the water-conducting cell layer. Mosses gametangia are multicellular and are located at the gametophyte tips. Female gametangia (archegonia) can be found either with male gametangia (antheridia) or with separate plants on the same plant.
Antheridium yields several sperms, while an archegonium yields a single egg. Once sperms are released they swim and enter archegonia with the aid of their flagella. This is separated by mitosis after fertilization and zygote formation and forms the sporophyte. Mosses sporophyte is a brown stalk with a swollen capsule over it. The leafy gametophyte is photosynthetic, but sporophyte is not and the gametophyte obtains nutrients.
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Let’s check some difference between liverworts and mosses.
Moss Vs Liverwort
Similarities Between Mosses and Liverworts
In the two liverworts and mosses, the gametophyte varies over the sporophyte.
Non - vascular plants are both "liverworts and mosses". Non-flowering plants are both the "liverworts and mosses".
Liverworts and mosses vary in the "haploid gametophyte morphology".
The main "difference between" liverworts and mosses is that the "liverwort gametophyte" is a "those or foliose" while the gametophyte of mosses is usually prostate, and a "branched filament structure".