What is Nannandrous form?

What is Nannandrous form?

Definition of nannandrous : having oogonia borne on normal-sized plants and antheridia borne on greatly reduced plants or filaments —used of green algae of the family Oedogoniaceae — compare macrandrous.

What is Macrandrous and Nannandrous?

nodulosum etc. In dioecious macrandrous species antheridia and oogonia are produced on separate male and female plants of normal size. (ii) Nannandrous: The female or oogonia bearing plants are normal. The antheridia are produced on special type of small or dwarf plants, known as Dwarf males or Nannandria.

What is the structure of Oedogonium?

Oedogonium filaments are typically unbranched and only one cell thick. Each cylindrical cell of the filament, with the exception of the basal cell that serves as a rootlike holdfast, contains a netlike chloroplast and a large central vacuole. Oedogonium filaments with visible oogonia (swollen cells).

What is the difference between Macrandrous and Nannandrous species of Oedogonium?

Explanation: As adjectives the difference between macrandrous and nannandrous. is that macrandrous is (botany) having antheridia formed on normal-sized male vegetative filaments while nannandrous is having nannandria.

What is Nannandrous Oedogonium?

The nannandrous species are always dioecious (heterothallic) i.e., antheridia and oogonia are borne on different filaments. In this type the antheridia develop on a very small filament termed as dwarf male or nannandrium. In nannandrous type initially androsporangia are developed in series on normal sized filament.

What is the order of Oedogonium?

OedogoniaceaeOedogonium / Order

What is Macrandrous Oedogonium?

Macrandrous Forms: Oedogonium macrandrous species can be monoecious or homothallic, if antheridia and oogonia are produced on same filament (Fig. 10, 11). Oedogonium macrandrous species can be dioecious or heterothallic if antheridia are produced on male plants and oogonia are produced on separate female plants.

What is the name of the round structure on Oedogonium?

Apical Cell
(iii) Apical Cell: The terminal cell of the filament called apical cell. It is round or dome shaped.

What is Oedogonium vegetative structure?

Structure. Oedogonium forms elongate filaments of cells, most of which are non-flagellated, cylindrical and have a cell wall that contains both cellulose and chitin. These cells are vegetative, i.e. are not associated with reproduction but only associated with photosynthesis and growth of the filament.

What is cap cell in Oedogonium?

Oedogonium has an unbranched and filamentous body. It has a reticulated or ribbon-shaped chloroplast. It has easily identifiable distinctive rings present at the apical ends of certain cells that are known as the cap cells. Moreover, each cellular division creates a new ring on the cap cells.

What is the shape of chloroplast in Oedogonium?

The cells of Oedogonium are cylindrical in shape. They contain a parietal, net-like chloroplast with several pyrenoids. It has a reticulated type of chloroplast present.

What is apical cap in Oedogonium?

Definition of apical cap : one of a series of bands resembling collars formed at the ends of the cells of green algae of the genus Oedogonium as a result of cell divisions.

What is cell division in Oedogonium?

In cell division the protoplasm divides, the first sign of which is the division of nucleus. In cell elongation the cell elongates gradually and uniformally. The method of cell division and growth of cell wall is unique and peculiar in Oedogonium. The cell wall does not elongate in the usual way.

Which algae has discoid shaped chloroplast?

The chloroplast is lens-shaped, oval, discoid,cup-shaped, girdle shaped, reticulate, plate-like, ribbon-shaped, or spiral. Chlamydomonas is unicellular green algae. The shape of Chlamydomonas chloroplast is cup-shaped….Detailed Solution.

Chloroplast shape	Examples
Reticulate	Oedogonium
Ribbon shaped	Ectocarpus

What is discoid chloroplast?

Discoid. Discoid-shaped chloroplast is found in higher plants, whereas cup-shaped chloroplast is found in the green algae Chlamydomonas. Ulothrix has girdle-shaped chloroplasts and Chlorophyceae have reticulate chloroplasts.

How many types of reproduction are in Oedogonium?

Oedogonium reproduces by all the three means: vegetative, asexual and sexual.

Which species of Oedogonium is terrestrial form?

The present paper deals with the descriptions of two new terrestrial species of Oedogonium LINK(Oedogonium angensis sp. nova and Oedogonium dasii sp. nova) collected from moist soil of Munger, Bihar, India. The former species is macrandrous and monoecious, whereas the latter species is macrandrous and dioecious.