Marchantia: Difference between revisions

Marchantia
	Marchantia polymorpha
Scientific classification
Kingdom:	Plantae
Division:	Marchantiophyta
Class:	Marchantiopsida
Order:	Marchantiales
Family:	Marchantiaceae
Genus:	Marchantia; L., 1753
Species
	See text

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Revision as of 10:36, 12 July 2021

Marchantia is a genus in the family Marchantiaceae of the order Marchantiales, a group of liverworts.

The Marchantia shows differentiation into two layers: an upper photosynthetic layer with a well-defined upper epidermis with pores and a lower storage layer. The thallus features tiny cup-like structures called gemma cups, containing gemmae, small packets of tissue that are used for asexual reproduction. The combination of barrel-shaped pores and the circular shape of the gemma cups are diagnostic of the genus.^[1]^: 22

Multicellular purple colored scales with single cell thickness and unicellular rhizoids are present on the ventral surface of the thallus.

Reproduction

Marchantia can reproduce both sexually and asexually. Sexual reproduction involves sperm from antheridia on the male plant fertilizing an ovum (egg cell) in the archegonium of a female plant. The antheridia and archegonia are borne atop special gametophore stalks called antheridiophores and archegoniophores, respectively. These are borne on separate thalli; hence, the plants are dioicous.

Once fertilized, the ovum is called a zygote and develops into a small sporophyte plant, which remains attached to the larger gametophyte plant. The sporophyte produces spores which develop into free-living male and female gametophyte plants.

Asexual reproduction occurs by means of gemmae, discoid clumps of cells which are genetically identical to the parent and contained in cup-like structures on the upper surface of the plant. These are dispersed when rain splashes into the cups and develop into new plants. Asexual reproduction can also occur when older parts of the plant die and the surviving newer branches develop into separate plants.

Species

References

^ Ian Atherton; Sam Bosanquet; Mark Lawley, eds. (2010). Mosses and Liverworts of Britain and Ireland - a field guide. British Bryological Society. ISBN 978-0-9561310-1-0.

External links

Data related to Marchantia at Wikispecies
Media related to Marchantia at Wikimedia Commons

This bryophyte-related article is a stub. You can help Wikipedia by expanding it.

[BBS-1] Ian Atherton; Sam Bosanquet; Mark Lawley, eds. (2010). Mosses and Liverworts of Britain and Ireland - a field guide. British Bryological Society. ISBN 978-0-9561310-1-0.

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 Once fertilized, the ovum is called a [[zygote]] and develops into a small [[sporophyte]] plant, which remains attached to the larger [[gametophyte]] plant. The sporophyte produces [[spore]]s which develop into free-living male and female gametophyte plants.
-Asexual reproduction occurs by means of [[gemma (botany)|gemma]]e, discoid clumps of cells which are genetically identical to the parent and contained in cup-like structures on the upper surface of the plant. These are dispersed when rain splashes into the cups and develop into new plants. Asexual reproduction can also occur when older parts of the plant die and the surviving newer branches develop into separate plants.marchantia is one of famous plants
+Asexual reproduction occurs by means of [[gemma (botany)|gemma]]e, discoid clumps of cells which are genetically identical to the parent and contained in cup-like structures on the upper surface of the plant. These are dispersed when rain splashes into the cups and develop into new plants. Asexual reproduction can also occur when older parts of the plant die and the surviving newer branches develop into separate plants.
 ==Species==