Question: What is the main function of gemma Cup?

The main function of the Gemma cup is vegetative reproduction. The Gemma is a small cup-shaped cell found on the thalli of bryophytes such as mosses and liverworts. The Gemma cells separated from the parent and develop into a new individual.

What is meant by gemma cups?

Definition. A small receptacle or cup on upper surface of bryophytes in which gemmae are produced from which they are splashed out of and dispersed by rain drops.

What are gemma Cups where do they occur?

These cups are located at the apex of the leafy moss and function in reproduction. The moss makes little discs of plant tissue inside the cups called gemmae.

What is the function of a gemmae Cup and how do they work?

These cup-shaped structures serve the purpose of asexual propagation on Marchantia polymorpha. They form little discs of plant tissue that can be spread by water, for example, and grow into clones of the mother plant. You can see several of these gemmae having spilled out already and lying on top of the mother plant.

What is gemma Cup Class 11?

Gemmae are green, multicellular, asexual buds, which develop in small receptacles called gemma cups located on the thalli. The sporophyte is differentiated into a foot, seta, and capsule. After meiosis, spores are produced within the capsule, the spores germinate to form free-living gametophytes.

What is gemma and its function?

A gemma (plural gemmae) is a single cell, or a mass of cells, or a modified bud of tissue, that detaches from the parent and develops into a new individual. This type of asexual reproduction is referred to as fragmentation. It is a means of asexual propagation in plants.

What is gemmae and gemma Cup?

Abstract. The basal land plant Marchantia polymorpha efficiently propagates in favourable environments through clonal progeny called gemmae. Gemmae develop in cup-shaped receptacles known as gemma cups, which are formed on the gametophyte body.

Why gametophyte is called so?

The gametophyte is the sexual phase in the life cycle of plants and algae. It develops sex organs that produce gametes, haploid sex cells that participate in fertilization to form a diploid zygote which has a double set of chromosomes.

Do Antheridia produce sperm?

The male sex organ, the antheridium, is a saclike structure made up of a jacket of sterile cells one cell thick; it encloses many cells, each of which, when mature, produces one sperm. The antheridium is usually attached to the gametophyte by a slender stalk.

What is the life cycle of Pteridophytes?

The life cycle of pteridophytes is a continuous reproductive process that is dominated by the sporophyte (sexual) stage of the alternation of generations. Fern spores are catapulted into the air, and the spores develop into heart-shaped haploid gametophytes that contain both male and female sex organs.

What is gemma Cup and gemmae?

The gemma cups are cup-like structures containing gemmae. The gemmae are small discs of haploid tissue, and they directly give rise to new gametophytes. They are dispersed from gemma cups by rainfall. The gemmae are bilaterally symmetrical and are not differentiated into dorsal and ventral surfaces.

What are Gammae and gemma cups?

Abstract. The basal land plant Marchantia polymorpha efficiently propagates in favourable environments through clonal progeny called gemmae. Gemmae develop in cup-shaped receptacles known as gemma cups, which are formed on the gametophyte body.

What are the two types of gametophytes?

These spores develop into two distinct types of gametophytes; one type produces sperm and the other produces eggs. The male gametophyte develops reproductive organs called antheridia (produce sperm) and the female gametophyte develops archegonia (produce eggs).

What is difference between gametophyte and sporophyte?

The spore develops into a gametophyte which is haploid in nature. The gametophyte consisting of reproductive organs undergo mitosis to form haploid gametes....Difference Between Sporophyte and Gametophyte.SporophyteGametophyteSporophytes have two sets of chromosomes.These have a single set of chromosomes.These reproduce asexually.These reproduce sexually.4 more rows

What carries sperm from the Antheridia?

During pollination, this generative cell divides and gives rise to sperm cells. The spermatogenous cells give rise to spermatids via mitotic cell division. In some bryophytes, the antheridium is borne on an antheridiophore, a stalk-like structure that carries the antheridium at its apex.

Is the Antheridia male or female?

Assorted References. …the male gametangia are called antheridia and the female oogonia or archegonia. A female gametangium with a sterile cellular jacket is called an archegonium, although, like an oogonium, it produces eggs.

What are the three types of pteridophytes?

The three different types of pteridophytes include:Ferns.Horsetails.Lycopods or Lycophytes.18 Jul 2019

What is the unique character of life cycle of pteridophytes?

Pteridophytes (ferns and lycophytes) are free-sporing vascular plants that have a life cycle with alternating, free-living gametophyte and sporophyte phases that are independent at maturity. The body of the sporophyte is well differentiated into roots, stem and leaves. The root system is always adventitious.

Does Moss produce sperm?

Some mosses have cups on their tops that produce sperm, these are male plants. The female counterpart has eggs between her overlapping leaves. Water is a necessity for fertilization; as the sperm become mature they have to swim to the eggs to fertilize them. The fertilized egg then produces the stalked brown capsule.

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