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When an anther opens, pollen grains are expelled through a location called the stomium, which is located in the anthers. It can be found in the groove that can be found on each anther lobe. Hence, the solution that is correct is B.
What does Stomium look like in the anther?
Stomium is a single layer of specialized epidermal cells that links adjacent anther walls and serves as the last rupture site for anther dehiscence. Stomium is the only part of the anther that does not dehisce.
Where exactly can one find Stomium?
The point at which a sporangium or pollen sac breaks open to release its contents (the spores or the pollen, respectively). It is often characterized by an region of cells with thin walls that burst as a result of the surrounding tissue becoming dry. In ferns, the stomium can be found beneath the annulus, while in seed plants, it can be found in between the pairs of pollen sacs.
How does stomium come to be?
The stomium results from the differentiation of epidermal cells within the anther, which results in the formation of a single cell region. The placement of this region defines where the anther opening will be.
What function does the endothecium serve in the anther?
The generation of pollen grains in the anther is the primary role played by the endothecium of the anther. Endothecium is the name given to the cell layer that lines the lumens of anthers, which plays a role in the maturation of pollen. It is responsible for the secretion of the materials that are necessary for the development of mature pollen grains in plants.
Pollen development and formation
Found 36 questions connected to this topic.
What is Endothesium?
: the inner lining of a mature anther.
What function does sporopollenin serve in the cell?
The pollen grains are shielded from the elements by sporopollenin, which prevents damage from factors like as high temperatures and precipitation. Sporopollenin is the most durable organic material ever discovered on Earth, and it is responsible for the formation of the exine’s outer covering.
What is the response of Stomium?
1: the cells of the annulus that have thin walls and mark the line or region where dehiscence occurs in a fern sporangium. 2: the aperture in an anther, typically between the cells of the lip, through which the process of dehiscence takes place.
What exactly is Pollenkitt constructed of?
Pollen kitt is composed of lipids and carotenoids from a chemical standpoint.
How does an anther open its mouth?
The final function of the anther, known as dehiscence, is responsible for the release of pollen grains into the environment. This process is carefully linked with the differentiation of the pollen, the growth of the floral bud, and the opening of the flower. At a particular location, the wall of the anther breaks…. The process of dehiscence takes place in the region of the anther known as the stomium.
Which layer of the Microsporangium is the Stomium responsible for forming?
The epidermis and the stomium are both products of the initial layer of development. The mature anther has an epidermis that has been extensively stretched and flattened, and this epidermis forms the outermost layer. The stomium can be found in the middle of each anther lobe, between the two locules.
What exactly are the terms annulus and Stomium?
‘The annulus is composed of cells that have extremely thick cell walls, and it appears as a band of cells.”The stomium is a region of thin-walled cells in certain spore-producing structures that ruptures to release the spores.”The annulus occurs as a band of cells.”The stomium is a region of thin-walled cells in certain spore-producing structures
Where exactly may one find the tapetum?
Within the anthers of flowering plants, there is a specialized layer of nutritive cells known as the tapetum. This layer of cells can be found between the sporangenous tissue and the anther wall. In addition to being a source of precursors for the pollen coat, tapetem is essential to the nourishment and development of pollen grains. It also plays a role in the formation of pollen grains.
What is there to see on the anther?
The anther is made up of four sac-like structures known as microsporangia, which are responsible for the production of pollen. Nectaries are little secretory structures that are frequently present at the base of the stamens. These structures offer pollinating insects and birds the opportunity to get food rewards. The term “androecium” refers to the entirety of a flower’s stamens taken as a whole.
What is the name of the layer that is located deepest within an anther wall?
The tapetum is the most superficial layer of the anther wall and is located immediately adjacent to the sporogenous tissue.
What exactly is the 12th class of Stomium?
The stomium is a layer of epidermal cells with relatively thin cell walls that can be found at the line of dehiscence. So, when it is time for the distribution of pollen grains, the anthers will only break and divide along this line of dehiscence. It is denoted by the letter ‘C’.
What is Malacophily?
/ (ˌmæləˈkɒfɪlɪ) / noun. botany pollination of plants by snails.
Which pollen has the longest length?
In the plant Zostera, researchers discovered the pollen grain with the largest length. The Zostera pollen grains can reach lengths of up to 2500 micrometers. The increased length of these grains results in a thicker, more durable outer wall that is composed of cellulose and sporopollenin. Seagrass is actually a species of the flowering plant genus Zostera, which grows in saltwater environments.
What exactly does the name Pollenkitt mean?
A material known as pollenkitt or pollen coat is deposited on the surface of the pollen of entomophilous flowers, which are flowers that are pollinated by insects. These flowers are also known as insect-pollinated flowers. Flowers that attract insects and animals to pollinate them typically have vibrant colors, pleasant scents, and the ability to create nectar. Orchids, antirrhinum, primulas, and other similar plants are some examples.
What are some applications for stomium?
stomium A region of cells in a sporangium or pollen sac with thin cell walls. When the surrounding tissue dries, this region ruptures, releasing the spores or pollen grains contained therein.
What exactly do you mean when you say “Prothallus”?
1: the gametophyte of a pteridophyte (such as a fern), which is often a small, flat, green thallus that is linked to the soil by rhizoids. 2: a structure of a seed plant that is significantly decreased in size and corresponds to the pteridophyte prothallus.
What exactly does it mean to diplospory?
The situation known as diplospory is characterized by the formation of a diploid embryosac from megaspore mother cells in the absence of a typical meiotic division. E.g: Eupatorium. Structures and events that take place after fertilization in plants are the focus of this concept.
What exactly is sporopollenin, and why is it such an essential component?
One of the biological polymers with the least potential for chemical reactivity is called sporopollenin. It plays a significant role in the construction of the sturdy exine walls that surround plant spores and pollen grains. It has a high degree of chemical stability and is typically kept in good condition in sediments and soils.
What causes the formation of sporopollenin?
It has been hypothesized by Brooks and Shaw3 that the carotenoids found in the anthers of Lilium henryi serve as the precursors of sporopollenin, and that exine is produced through the oxidative polymerization of a combination of carotenoids and carotenoid esters that are present in the anther material.
Where exactly can you get sporopollenin in plants? What exactly is the meaning of it?
Plants have sporopollenin in their exine, which is found in the pollen grains. The following is its significance in relation to the chemical nature of the substance: It is one of the organic substances that is capable of withstanding high temperatures, as well as strong acids and alkalis. There is currently no enzyme known that can break down sporopollenin.