- Why anther is called Tetrasporangiate?
- Is Microspore a pollen grain?
- Is Solanaceae a Bracteate?
- Which type of inflorescence is found in Solanaceae?
- Where are Microsporangia located in flowering plants?
- Is Megasporangium and ovule the same?
- How many theca are present in anther?
- What type of ovary is found in family Solanaceae?
- What is a anther?
- What is a Microsporocyte?
- Are Megaspores haploid or diploid?
- What is the position of ovary in flower of Solanaceae?
- Is anther a Microsporangium?
- Is Microsporangia and Microsporangium same?
- Is ovule a Megasporangium?
- How many Microsporangia are present in an anther?
- What is Microsporangia flower?
- What is mega Sporogenesis?
Why anther is called Tetrasporangiate?
Because a typical young anther has four Microsporangia (pollen sac) hence called tetrasporangiate..
Is Microspore a pollen grain?
In seed plants the microspores develop into pollen grains each containing a reduced, multicellular male gametophyte. … Each of the microsporocytes in the microsporangia undergoes meiosis, producing four haploid microspores. These develop into pollen grains, each consisting of four cells and a pair of external air sacs.
Is Solanaceae a Bracteate?
Floral Characters Flower: Complete, bisexual, zygomorphic, hypogynous, bracteate/ ebracteate. Calyx: Five sepals, gamosepalous; valvate or imbricate aestivation. Corolla: Five petals, polypetalous, papilionaceous, vexillary aestivation.
Which type of inflorescence is found in Solanaceae?
inflorescence of species in the Solanaceae family has been generally classified as a cyme. Typically, cymose in- florescences are defined by determinate growth in which the inflorescence meristem terminates into a floral bud, followed by the next floral meristem forming on the flank of the previous flower.
Where are Microsporangia located in flowering plants?
stamenMicrosporangia are located in the stamen of the flower, where the male gametophyte (pollen grains), or male sex cell, is formed.
Is Megasporangium and ovule the same?
As nouns the difference between megasporangium and ovule is that megasporangium is (biology) a sporangium which produces only megaspores while ovule is (botany) the structure in a plant that develops into a seed after fertilization; the megasporangium of a seed plant with its enclosing integuments.
How many theca are present in anther?
two thecaA typical angiosperm anther has two parts, an anther and a slender, thread like filament. Each anther is a bilobed structure, i.e., it has two lobes, and each lobe is dithecous i.e., has two theca. Each theca has a mass of sporogenous tissue which develops into microsporangium or pollen sac.
What type of ovary is found in family Solanaceae?
In the great majority of species, the flowers have a differentiated perianth with a calyx and corolla (with five sepals and five petals, respectively) an androecium with five stamens and two carpels forming a gynoecium with a superior ovary (they are therefore referred to as pentamers and tetracyclic).
What is a anther?
Anther: The part of the stamen where pollen is produced. Pistil: The ovule producing part of a flower.
What is a Microsporocyte?
microsporocyte. [ mī′krə-spôr′ə-sīt′ ] A diploid cell that undergoes meiosis to produce microspores as part of microsporogenesis. Also called microspore mother cell pollen mother cell. The American Heritage® Science Dictionary Copyright © 2011.
Are Megaspores haploid or diploid?
A megaspore mother cell, or megasporocyte, is a diploid cell in plants in which meiosis will occur, resulting in the production of four haploid megaspores. At least one of the spores develop into haploid female gametophytes (megagametophytes). The megaspore mother cell arises within the megasporangium tissue.
What is the position of ovary in flower of Solanaceae?
In the Solanaceae family, the ovary is oblique in position due to the tilting of posterior carpels to the right and anterior carpels to the left at an angle of 45 degrees. The ovary is superior, bilocular with many ovules on swollen axile placentation.
Is anther a Microsporangium?
…in terminal saclike structures (microsporangia) called anthers. The number of stamens comprised by the androecium is sometimes the same as the number of petals, but often the stamens are more numerous or fewer in number than the petals.
Is Microsporangia and Microsporangium same?
Male Gametophyte (The Pollen Grain) In a plant’s male reproductive organs, development of pollen takes place in a structure known as the microsporangium (Figure 5). The microsporangia, which are usually bi-lobed, are pollen sacs in which the microspores develop into pollen grains.
Is ovule a Megasporangium?
Ovules are immature seeds, consisting of a stalk, the funiculus, a megasporangium (also called the nucellus), from which develops the megasporocyte and female gametophyte, plus one or two surrounding integuments.
How many Microsporangia are present in an anther?
four microsporangiaThe bilobed nature of an anther is very distinct in the transverse section of the anther. The anther is a four-sided (tetragonal) structure consisting of four microsporangia located at the corners, two in each lobe. The microsporangia develop further and become pollen sacs.
What is Microsporangia flower?
Microsporangia are sporangia that produce microspores that give rise to male gametophytes when they germinate. Microsporangia occur in all vascular plants that have heterosporic life cycles, such as seed plants, spike mosses and the aquatic fern genus Azolla.
What is mega Sporogenesis?
Megasporogenesis refers to the development of megaspores from the megasporocyte, the cell that undergoes meiosis. … In most taxa, meiosis is followed by cytokinesis, resulting in four megaspore cells.