What Is The Life Cycle Of Ectocarpus?

Where is Ectocarpus found?

Ectocarpus is a cosmopolitan marine brown seaweed found mostly as free-floating filaments in intertidal to sublittoral zones of temperate regions.

It can also easily grow as epiphytes on other seaweeds..

What is Plurilocular?

Plurilocular sporangia- large number of cuboidal cells, each cell develops into zoospores (2N) each develops into sporophyte (clone). More common at warmer temperatures. 2. Unilocular sporangia- one enlarged cell undergoes meiosis, then several mitosis occur to 32 or 64 (1N) zoospores.

What is Heterotrichous habit?

: having the thallus differentiated into a prostrate portion and an upright or projecting system many algae are heterotrichous.

What is unilocular and Plurilocular Sporangia?

Unilocular and plurilocular are two types of sporangia produced by Ectocarpus. Ectocarpus is a type of filamentous brown algae, consisting of one of the simplest thalli in brown algae. … Unilocular sporangia are common at cooler temperatures whereas plurilocular sporangia are common at warmer temperatures.

Is Fucus a fungi?

In a preliminary study of fungi associated with Fucus serratus, Zuccaro et al. … These organisms are primarily recognized as fungi that are active in terrestrial environments and include known endophytes and pathogens (9, 16, 34).

Is Ectocarpus unicellular?

Ectocarpus is (1)Unicellular green algae.

What is Haplodiplontic life cycle?

Fertilization gives rise to a multicellular diploid sporophyte, which produces haploid spores via meiosis. This type of life cycle is called a haplodiplontic life cycle (Figure 20.1). … In haplodiplontic life cycles, gametes are not the direct result of a meiotic division.

How does Fucus reproduce?

Bladderwrack is a dioecious organism, meaning that male and female gametes are produced on two different organisms. The organism requires water for reproduction, as it produces flagellated sperm that move toward the egg to fertilize it via the water, this is called broadcast spawning.

What is the life cycle of Laminaria?

Laminaria exhibits a diplohaplontic life cycle, with macroscopic sporophytes followed by a microscopic gametophyte with an oogamous mode of sexual reproduction (Fig. 3.11).

What is the life cycle of Fucus?

The sexual life cycle is gametic; the free-living stage is diploid, and the only haploid stages are the gametes. The gametes (1) are produced in the receptacles, from which they are then released and fertilization is external.

Are Sporangia present in the branches of Ectocarpus?

Both kinds of sporangia are present on the same diploid sporophyte plant. The sporangia are borne terminally and singly on lateral branches.

What is the meaning of Ectocarpus?

Ectocarpus is a genus of filamentous brown alga that is a model organism for the genomics of multicellularity. Among possible model organisms in the brown algae, Ectocarpus was selected for the relatively small size of its mature thallus and the speed with which it completes its life cycle.

Why Laminaria is called Devil’s apron?

Laminaria is a genus of 31 species of brown algae commonly called “kelp”. … Some species are referred to by the common name Devil’s apron, due to their shape, or sea colander, due to the perforations present on the lamina.

Is Fucus a red algae?

Fucus, also called rockweed, genus of brown algae, common on rocky seacoasts and in salt marshes of northern temperate regions. Fucus species, along with other kelp, are an important source of alginates—colloidal extracts with many industrial uses similar to those of agar.

What is reserve food material in Ectocarpus?

The reserve food material is in form of laminarin and mannitol. The cell wall is differentiated into two layers, the inner firm layer is made of cellulose and the outer gelatinous layer contains alginic acid.