The world of liverworts, mosses, and hornworts, generally known as bryophytes, forms a magnificent little forest; nevertheless, they are sometimes missed due to their modest size and lack of bright blooms. However, it is precisely these features that make bryophytes so intriguing in terms of evolution. Bryophytes also serve a vital role in the ecosystem; they colonise barren soils, absorb water and nutrients, and slowly release them back into the environment, helping to build soil for plants to develop on.

This paper discusses the features of bryophytes and discusses the uses of bryophytes are

What are the bryophytes? 

Bryophyta is derived from ‘Bryon’, which means moss, and ‘Python’ means plants. Embryophytes such as hornworts, mosses, and liverworts are members of the Bryophyta family. These are the tiny plants that develop in shady and moist conditions. They are devoid of vascular tissues. Instead of flowers and seeds, they reproduce through spores.

Even though almost all bryophytes do not have complicated tissue organization, they have various shapes and ecology. They can be found worldwide and are much smaller than most seed-bearing plants. Bryology is the study of bryophytes.

Like all terrestrial plants, Bryophytes undergo life cycles with generations that alternate. ‘In each cycle, a ‘haploid gametophyte’, with a set amount of unpaired chromosomes in each cell, exchanges with a ‘diploid sporophyte’, with two different sets of ‘paired chromosomes’ in each cell. Gametophytes generate haploid sperm and eggs, which combine to form diploid zygotes, which develop into sporophytes. Sporophytes create haploid spores during meiosis, which develop into gametophytes.

Mosses, liverworts and hornworts spend most of their lives as gametophytes. Gametangia, antheridia, and archegonia are produced on the gametophytes, sometimes at the tips of shoots, in the axils of leaves, or hidden under thalli.

Other salient  features of bryophytes ?

The salient features of bryophytes are, 

• Plants grow in a moist, shady environment
• Rhizoids, which can be unicellular or multicellular, attach it to the substratum.
• They lack actual vegetative structure and have a stem-like,root-like, and leaf-like structure.
• Plants do not have a vascular system. 
• The haploid gametophyte is the primary component of the plant body.
• Rhizoids, axis, and leaves are the three parts of the thalloid gametophyte.
• The gametophyte is photosynthetic and has multicellular sex organs.
• The antheridium produces flagellated antherozoids.
• An archegonium is shaped like a flask and releases one egg.
• The antherozoids join forces with an egg to form a zygote.
• The zygote grows to become a multicellular sporophyte.
• The sporophyte is a semi-parasitic organism that feeds on the gametophyte.
• Sporophyte cells meiosis to create haploid gametes that form a gametophyte.
• Protonema is the name given to the juvenile gametophyte.
• The sporophyte is divided into the foot seta and the capsule.

Classification of bryophytes 

Traditionally, all live terrestrial plants with no vascular tissues were usually categorised in a singular taxonomic group, which was frequently a division of a larger taxonomic group. Wilhelm Schimper, a German bryologist, used the word Bryophyta in 1879 to identify a group that included all three bryophyte clades. Marchantiophyta or liverworts, Bryophyta or mosses, and Anthocerotophyta or hornworts are the major bryophyte clades.

Bryophyta or mosses: With over 1400 species, it is a significant class of Bryophyta. They are frequently referred to as mosses. Most mosses, especially liverworts, prefer moist conditions. Unlike other bryophytes, they thrive as well in arid settings. Mosses, on the other hand, require water to reproduce. Thus they typically form cushions or mats. Examples include Polytrichum, Funaria, and Sphagnum.

Anthocerotophyta or hornworts: This class contains approximately 300 species. They are usually referred to as hornworts. It only contains one order, Anthocerotales. This bryophyte clade is slightly more sophisticated than Hepaticopsida and Bryopsida in various areas. From a distance, the gametophyte seems to be highly lobed and irregular. Except for during the early stages of development, the sporophyte is not dependent on the gametophyte for nutrition or protection. Antheridia and archegonia are partially immersed in gametophytic tissue. Examples include Megaceros, Anthoceros, and Notothylas. 

Marchantiophyta or liverworts: This group includes liverworts, a form of bryophyte. It includes over 900 species. Liverworts are the most basic bryophytes. They prefer to live in moist stones and wet soil. Since they live near the water, drying out is significantly reduced.

What are the uses of bryophytes?

Since bryophytes are one of the oldest land plants, most people are unaware of their importance.

Bryophytes are employed in –

• Pharmaceuticals
•  horticulture
•  domestic items
•  they are also vital for the environment. 
• The bryophyte flora’s numerous functions and applications are becoming better recognized worldwide. 

Conclusion

There is still a chance to know about bryophytes, particularly in the tropics, where they are less common and thus less studied. There is a rising interest in expanding the research of bryophytes in the tropics to learn further about their evolution and significance in the region’s biodiversity.