What are Sporophylls in angiosperms?
sporophyll A leaf that bears sporangia (spore-producing structures). In ferns the sporophylls are the normal foliage leaves, but in other plants the sporophylls are modified and arise in specialized structures such as the strobili (cones) of clubmosses, horsetails, and gymnosperms and the flower of angiosperms.
Which part of a plant is termed as Megasporangia?
Hint: Megasporangium is a sporangium that produces the megasporocytes which in turn develop the megaspores. These are the specialized structures present in the plant body and are used for reproduction purposes. They can be present in the form of flowers or cones.
What do Megasporangia contain?
The megasporangium contains megaspore mother cells, which divide by meiosis to produce haploid megaspores. A megaspore develops into a female gametophyte containing a haploid egg.
Are sporophylls present in angiosperms?
1 Introduction. Flowers are determinate structures for reproduction in angiosperms, with sporophylls producing male and female gametophytes.
Where are megasporangium found?
function. Megasporangia (female sporangia) produce megasporocytes (megameiocytes) that yield megaspores. The sporangia may be borne in specialized structures such as sori in ferns, cones (strobili) in some pteridophytes and most gymnosperms, or flowers in angiosperms.
Which plant has integument megasporangium?
The integumented megasporangia fist evolved in flowering plant group because in seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells.
What produces megaspores in angiosperms?
Megasporogenesis. In gymnosperms and flowering plants, the megaspore is produced inside the nucellus of the ovule. During megasporogenesis, a diploid precursor cell, the megasporocyte or megaspore mother cell, undergoes meiosis to produce initially four haploid cells (the megaspores).
What is Megasporangia and Megasporangium?
Megasporangia (female sporangia) produce megasporocytes (megameiocytes) that yield megaspores. The sporangia may be borne in specialized structures such as sori in ferns, cones (strobili) in some pteridophytes and most gymnosperms, or flowers in angiosperms.
Which structure produces megaspores in angiosperms?
the ovary
Megaspores are produced by meiosis inside a structure at the base of the flower known as the ovary. After a series of intricate nuclear divisions, two functional gametophyte cells remain: the egg and the endosperm producing cell.