Leptosporangium vs Eusporangium – In the first step in leptosporangium, the epidermal cells of leaf or sporangiophore some sperm cells behave as superficial initial cells. Superficial initial cell divides periclinally due to which to form two celled body structures. Secondly, the outer cell as sporangial initial cell and inner cell that does not take part in further division as stalk cell. The sporangial initial cell divides obliquely 3 times continuously results in 8 celled body structures.
After division of sporangial initial cells the apical cell divides periclinally results in outer cell as jacket initial cell and inner cell as primary sporogenous cell. The Jacket initial cells, divide anticlinally results in single layer of sporangium wall that is also known as capsule. Also at that time, primary sporogenous cell divide periclinally results in formation of two cells, outer as tapetum initial cell and inner as archesporangium initial cell. Tapetum initial cell divides first periclinally and then anticlinally results in two layers tapetum. Also, that time archesprangium initial cell divides anticlinally results in single layer as archesporangium layer that is also known as sporogenous. Leptosporangium vs Eusporangium
Spore Mother Cells
Some cells of sporogenous tissue detached known as spore mother cells, which upon meiosis to form spores as tetrad. At maturity, when there is formation of tetrads along with time of dehiscence. There is disintegration of tapetum and sporogenous tissue along with there is also developed differential sporangium wall.
Development of Leptosporangium and Eusporangium In first step of development of eusporangium, the Superficial Initial Cells (Sporangium initial cell) are formed. Primary wall initial cells also called Outer Primary Jacket Initial Cell and Archesporangium Initial Cells (Primary Sporogenous Cell) are formed.
In the second step, the periclinal and anticlinal division takes place in outer primary jacket initial cell due to which 2 to 7 layered sporangial wall is formed. The inner most layer is behave as a single layered Tapetum as you can see in the diagram. The rest of the sporogenous tissue converts into spore mother cells. Here the sporogenous tissues behave as a mass of cells which are in a scattered form. Leptosporangium vs Eusporangium
Spore Mother Cells
Some cells of sporogenous tissue which are detached and remained transforms into spore mother cells, which upon meiosis to form spores as tetrad. At maturity the tapetum does not disintegrates
Differences Between Leptosporangium and Eusporangium
Following tables shows the differences between leptosporangium and eusporangium
Read also:- Sporangium and Different Spore Types