your own Pins on Pinterest Reproduction and Life Cycle. Sea lettuce goes through two reproductive phases. In haplontic life cycle, the zygote is the only diploid (2n) stage, and mitosis occurs only in the haploid (n) phase. Discover (and save!) It is thus that same zygotic cell that later undergoes meiosis. 80758).Also has the potential use as animal feeds in the form of ground meal (Ref. Ulva Life Cycle: (sporic meiosis)-Haploid and Diploid forms alternate-Sporophyte > haploid zoospores via meiosis > zoospores become haploid gametophytes > produce gametes > gametes release into ocean to fuse > become diploid zygotes > zygotes grow into sporophyte. Introduction The haplodiplontic life cycle of the multicellular green alga Ulva mutabilis (F^yn, 1959) is shown schematically in Fig. Life Cycle of Ulva XI Biology Chapter 9 Kingdom Protista #Life #Cycle #Ulva #Biology #Kingdom #Protista. The growth response of Ulva lactuca L. to different combinations of phosphorus and nitrogen was followed using discs cut from the expanded region of mature plants. Ulva: Sea lettuce. The thallus of ulvoid species is flat and blade-like and is composed of two layers of cells. After fertilization a zygote is formed: this cell is the only diploid cell in the entire life cycle. Since individual haploid (n) cells are formed by mitosis, this life cycle is referred to as haplontic life cycle. l. Gametes develop into sporophytes, either by fusion or parthenogenetically. A haploid life cycle is found in most fungi and in some green algae … During the second phase, the male and female plants produce gametes by mitosis. This includes the life cycles of many protozoa, all fungi, and some algae types. In this article we will discuss about the life cycle of laminaria, explained with the help of suitable diagrams. 26875).Grows in intertidal areas exposed to air during low tide, in shallow water near shores, or attached to other seaweed species such as Sargassum (Ref. Ulva sp. The spores settle and grow to form male and female plants. Diplontic Life Cycle: The plant body is sporophyte and develops sex organs. Dec 2, 2015 - This Pin was discovered by Aerobe. This type of life cycle is found in majority of Chlorophyceae like Chlamydomonas, Ulothrix, Oedogonium, Spirogyra, Chara etc. Complete the generalized alternation of generations diagram below using the following terms: gametophyte, zygote, mitosis, sporophyte, spores, and meiosis. 801). and all members of Xanthophyceae. Addition of either NO 3-N or PO 4-P stimulated growth, optimum levels being 0.6 g/m 3 for both nutrients. The sporophytes prodüce zoospores by a meiotic sporulation division independent of beinghaploid or diploid (Hoxmark and Nordby, 1974). are a group of multicellular green algae that exhibit an alternation of generation life cycle as found in land plants. Order Laminariales of Laminariaceae: This order contains the largest and most elaborately organized plant body of all algae. The gametes unite and develop into adult plants. This life cycle is also known as monogenic life cycle. During the first phase, adults produce spores by meiosis. It is edible and is often called 'Sea Lettuce'. The haplontic life forms produce the gametes through mitosis. Diagram, Formula and Economic Importance - Duration: 7:00. 80758).Often detached and free-floating at midtide (Ref. Edible. Pattern # 2. Used as medicine and source of vitamins E, A, and B1 (Ref. Sex organs produce gametes by meiosis. This is a small genus of marine and brackish water green algae. 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