sexual reproduction in anthoceros? in detail?
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Anthoceros is either dioecious i.e., hetero- thallic (e.g., A. himalayensis, A. hallii, A erectus, A. pearsoni) or monoecious i.e., homothallic (e.g., A. fusiformis, A. gollani, A. punctatus). Monoecious species are usually protandrous i.e., antheridia mature before archegonia. Antheridia and archegonia are embedded in the dorsal surface of the thallus. They develop in continuous rows just behind the apical growing point.Development and Structure of Antheridium:
In the species of Anthoceros, the antheridium develops from a hypodermal cell as opposed to liverworts. A superficial dorsal cell, lying close to the growing apex, usually divides by a periclinal wall into an upper roof initial and a lower antheridial initial (Fig. 6.32A-B). The upper roof initial first divides periclinally, followed by many anticlinal divisions to form a multi-celled roof over the antheridium.
In the species of Anthoceros, the antheridium develops from a hypodermal cell as opposed to liverworts. A superficial dorsal cell, lying close to the growing apex, usually divides by a periclinal wall into an upper roof initial and a lower antheridial initial (Fig. 6.32A-B). The upper roof initial first divides periclinally, followed by many anticlinal divisions to form a multi-celled roof over the antheridium.
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