Identify the labeled parts in the given diagram of Marchantia.
Identify the labeled parts in the given diagram of Marchantia.
The correct option is D A - Archegoniophere B - Gemma cup C - Rhizoids
The ventral surface of Marchantia thallus bears rhizoids between the scales. The rhizoids perform the functions of anchorage to the substratum as well as absorption of water and nutrients from soil. The sexually mature thalli bear specialised erect branches called gametophores which bear sex organs. These branches are umbrella shaped and arise from the apical notch. They are of two types - antheridiophore and archaegoniophore.The antheridiophore bears antheridia and the archegoniophore, the archegonia. Marchantia is dioecious or heterothallic, therefore, a thallus bears either antheridiophores or archegoniophores. Marchantia can reproduce vegetatively by gemmae. Gemmae are green, multicellular, asexual buds, which develop in small receptacles called gemma cups located on the thalli.
The gemmae become detached from the parent body and germinate to form new individuals.
A - Archegoniophere B - Gemma cup C - Rhizoids
The ventral surface of Marchantia thallus bears rhizoids between the scales. The rhizoids perform the functions of anchorage to the substratum as well as absorption of water and nutrients from soil. The sexually mature thalli bear specialised erect branches called gametophores which bear sex organs. These branches are umbrella shaped and arise from the apical notch. They are of two types - antheridiophore and archaegoniophore.The antheridiophore bears antheridia and the archegoniophore, the archegonia. Marchantia is dioecious or heterothallic, therefore, a thallus bears either antheridiophores or archegoniophores. Marchantia can reproduce vegetatively by gemmae. Gemmae are green, multicellular, asexual buds, which develop in small receptacles called gemma cups located on the thalli.
The gemmae become detached from the parent body and germinate to form new individuals.
