reproduction in algae slideshare

Asexual reproduction is the production of progeny without the union of cells or nuclear material. ANISOGAMY-Gametes have flagella but are dissimilar in shape and size. Plant cuttings/ vegetative propagation. In that only a single form of the plant (biont) occurs in nature. Algae are photosynthetic organisms belonging to the kingdom Protista. The groups are called phyla (singular, phylum) by some microbiologists, and classes by others. Green algae bestow lichens with a bright green color, while cyanobacteria give hues of dark green, brown, or black, according to the Forest Service. The course has been developed to provide the students basic knowledge about viruses, viroids, Prions, bacteria and algae. Protista Organisms: Amoebae, green algae, brown algae, diatoms, euglena, slime molds Cell Type: Eukaryotic Metabolism: Oxygen is needed for metabolism. They are important ecologically and environmentally because they are responsible for the production of approximately 70% of the oxygen and organic … This book covers topics such as: evolution of sex and sexuality in algae; and, pigments in algae with their chemistry and the evolution of thallus in algae. Algae are very important because they make much of Earth’s oxygen, which humans and other animals need to breathe. Reproduction in algae occurs in both asexual and sexual forms. Zoospore, aplanospore, hypnospore, tetraspore, autospore, akinetes etc are the important spore types in algae The study of plants is known as botany and in this introduction … Mode # 1. All protozoal species are assigned to the kingdom Protista in the Whittaker classification.The protozoa are then placed into various groups primarily on the basis of how they move. Algae produce an estimated 30 to 50 percent of the net global oxygen available to humans and other terrestrial Animals for respiration. Type A and type B are haplobiontic. The sporophyte produces spores, completing the life cycle. The genus Spirogyra comprises more than 300 species and most of them are free floating algae. Sexual Reproduction: 1. Some species of Brown Algae use sexual reproduction, while others use asexual. About; Communities; Gallery; Past projects; Testimonials; algae ppt slideshare The formation of new plants out of rhizomes or stolons is an example of vegetative reproductive, such as in the strawberry plant. Vegetative reproduction is a type of asexual reproduction found in plants. Hypnospores 2.9. Following means of asexual reproduction are used by plants: (a) Budding: This method is used by unicellular plants; like yeast. This is significant because it is not ordinarily seen in plant cells. Auxospore formation. Some algae are in filamentous form, e.g. This will also help you to draw the structure and diagram of reproduction in bacillariophyta. Picophytoplankton, such as Micromonas polaris, are predicted to benefit from such changes.However, little is known about how these environmental changes affect the viruses that exert a strong mortality pressure on these small but omnipresent algae. Fig.,2.8. Sexual- Gametes 18. If there is enough moisture, the gametophyte is fertilized and grows into a diploid sporophyte. Perfect fungi reproduce both sexually and asexually, while imperfect fungi reproduce only asexually (by mitosis). The most common type of asexual multiplication is binary fission, in which the organelles are duplicated and the protozoan then divides into … Sexual reproduction in this class, as in Chlorophyceae, is characterized by the formation of a zygospore and zygotic meiosis. Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts to separate entities resembling the original.The object experiencing fission is usually a cell, but the term may also refer to how organisms, bodies, populations, or species split into discrete parts. It often grows in abundance in water rich in ammonium compounds. The Method of Reproduction in Ferns. Each cell uses its flagella simultaneously to move the colony. The lineage “Plantae” includes glaucophyte algae, red algae, green algae and land plants. Algae are organisms, or living things, that are found all over the world. The seaweeds range from large multicellular algae to single-celled organisms and are classified into three groups, the green algae, red algae and brown algae. Reproduction in Multicellular Algae Oedogonium reproduction Antheridium-release flagellated sperm that swim to the oogonium Oogonium-houses the zygote which is a diploid spore The spore undergoes meiosis and produces 4 haploid zoospores. Asexual Reproduction. Male and female sex organs are known as antheridia (Sing, antheridium) and archegonia (Sing, archegonium), respectively. Some species of starfish carry out asexual reproduction when they reach the adult stage, by means of the fission of their central disk or as a consequence of losing one of their arms. Vegetative Propagation. The account of algae dates back to ancient Chinese literature and it is a believe that along with the origin of plant sciences, the recognition of algae as a group has taken place. It was Leeuwenhoek, 1674 who first observed unicellular algae under the microscope. In warm, nutrient-rich (high in phosphorus and nitrogen) … Cyanobacteria, or blue-green algae, can be used as host to produce polyhydroxyalkanoates (PHA), which are promising bioplastic raw materials. Sexual reproduction is of three … Reproduction in algae: Ø Algae reproduce by three methods: (1). The species of Scytonema grow on the walls in rainy season and the whole wall becomes black spotted. Representatives of the green algal lineage moved onto land around 470 million years ago and became the dominant inhabitants of the … Asexual methods of reproduction include apogamy, poliferous frond tips, and … It may be predominantly haploid as in A (Zygotic), or it may be predominantly diploid as in B (Gametic). Algae - Algae - Reproduction and life histories: Algae regenerate by sexual reproduction, involving male and female gametes (sex cells), by asexual reproduction, or by both ways. Human consumption of the blue-green algae called spirulina actually goes back to the Aztec civilization of the 14th century, and this type, including chlorella, is the edible variety most commonly used in supplements.. The hanging drop technique is a well-established method for examining living, unstained, very small organisms. Smith 1950) place all of the green algae into a single group. Bispores 2.5. Spore Formation. Red algae, or rhodophytes, are primarily multicellular, lack flagella, and range in size from microscopic, unicellular protists to large, multicellular forms grouped into the informal seaweed category. Reproduction in the Protozoa may be asexual, as in the amebas and flagellates that infect humans, or both asexual and sexual, as in the Apicomplexa of medical importance. They inhabit both in aquatic and terrestrial environments. Others produce tiny buds that go on to divide and grow to the size of the parental protist. Diatom cells multiply usually by a peculiar method of cell division. General characteristics of algae, Classification of algae based on habitat, Thallus diversity in algae, Chloroplast shape variations in algae, Pigmentation in algae, Reproduction in algae, Life cycle in algae The most important material thereof is polyhydroxybutyrate (PHB), which can replace the commodity polymer polypropylene (PP) in many applications, yielding a bio-based, … However, some species like S. rhizopus, S. dubia etc are found attached to substratum by the means of rhizoids. Ulothrix and Spirogyra. Algae lack a well-defined body, so, structures like roots, stems or leaves are absent. Algaes are found where there is adequate moisture. The fission may be binary fission…

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