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Identificazione e distribuzione nei mari italiani di specie non indigene Classe Chlorophyceae Acetabularia caliculus Ordine Dasycladales J.V. Lamouroux Famiglia Polyphysaceae SINONIMI RILEVANTI Nessuno DESCRIZIONE COROLOGIA / AFFINITA’ Pantropicale. Tallo unicellulare, alto 1-3 cm, dalla caratteristica forma ad ombrello rovesciato. L'asse porta diversi verticilli di peli incolori, settati, ramificati DISTRIBUZIONE ATTUALE dicotomicamente fino al quinto ordine. Durante la Nord-est Atlantico, Caraibi, Brasile, Pacifico fase riproduttiva il disco apicale (diametro 4-7 occidentale, Indiano, Australasia, Mediterraneo. mm) appare concavo e costituito da 22-30 raggi (gametocisti) con margini esterni distintamente PRIMA SEGNALAZIONE IN MEDITERRANEO intaccati. Gli esemplari non ancora in fase Sabkhat el Bardawil lagoon, Sirbonian sea (in riproduttiva non presentano il caratteristico disco Lipkin, 1972). apicale e l'asse porta numerosi verticilli di rami verde chiaro. PRIMA SEGNALAZIONE IN ITALIA COLORAZIONE - Verde brillante. ORIGINE FORMULA MERISTICA Oceano Indiano, Bacino Indo Australiano - TAGLIA MASSIMA VIE DI DISPERSIONE PRIMARIE - Dal Canale di Suez per via naturale o mediante il fouling, le acque di zavorra, le ancore delle navi STADI LARVALI commerciali e da diporto e gli attrezzi da pesca.. - SPECIE SIMILI VIE DI DISPERSIONE SECONDARIE Acetabularia acetabulum Dispersione naturale, fouling e attrezzi da pesca. Identificazione e distribuzione nei mari italiani di specie non indigene CARATTERI DISTINTIVI STATO DELL ’INVASIONE Non nativo - MOTIVI DEL SUCCESSO HABITAT Sconosciuti III.6.1. Biocenosi delle alghe infralitorali. SPECIE IN COMPETIZIONE PARTICOLARI CONDIZIONI AMBIENTALI - Sconosciute. IMPATTI - BIOLOGIA DANNI ECOLOGICI Il ciclo biologico è monogenetico aplofasico. Predilige ambienti superficiali e ricchi di - sedimenti. DANNI ECONOMICI - IMPORTANZA PER L ’UOMO Sconosciuta BANCA DEI CAMPIONI - PRESENZA IN G -BANK - PROVENIENZA DEL CAMPIONE TIPOLOGIA : (MUSCOLO / ESEMPLARE INTERO / CONGELATO / FISSATO ECC ) LUOGO DI CONSERVAZIONE CODICE CAMPIONE Identificazione e distribuzione nei mari italiani di specie non indigene BIBLIOGRAFIA BALLESTEROS E. (1990) - Check-list of benthic marine algae from Catalonia (Northwestern Mediterranean).Treballs de l'Institut Botànic de Barcelona, 13: 5-52. BERGER S., KAEVER M. J. (1992) - Dasycladales. An illustrated monograph of a fascinating algal order. Georg Thieme Verlag Stuttgart. New York. 247 pp. GONZÁLEZ J.A., CONDE F. (1994). Catalogo del macrophytobenthos del Mediterraneo de Marruecos. Acta Botanica Malacitana, 19: 5-27. HUISMAN J.M. (2000) - Marine Plants of Australia. University of Western Australia Press: 300 pp. LIPKIN Y. (1972) - Marine algal and sea-grass flora of the Suez canal (The significance of this flora to the understanding of the recent migration through the Canal). Israel Journal of Zoology, 21: 405-446 VALET G. (1968) - Contribution a l'étude des Dasycladales. I. Morphogenese. Nova Hedwigia, 16: 21-82. .

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Syllabus of Msc Degree in Botany W.E.F. 2019-20
UNIVERSITY OF KERALA THIRUVANANTHAPURAM M.Sc. Degree in Botany (Semester System) Revised Course Structure & Syllabus (w.e.f. 2019 Admissions) October 2018 PG BOARD OF STUDIES IN BOTANY UNIVERSITY OF KERALA M.Sc. Degree in Botany (Semester System) Revised Course structure Semes Paper Hours/ Hours / ESA Title of the Paper Maximum Marks ter Code semester week hours L P 3 CA ESA Total Phycology, Mycology, BO 211 108 6 2 3 25 75 100 Microbiology & Plant Pathology Bryophyta, Pteridophyta & I BO212 Gymnosperms 108 6 2 3 25 75 100 Histology, Reproductive Biology, BO213 Microtechnique & Histochemistry 108 6 3 3 25 75 100 BO214 Practical I 126 7 4 25♦ 75♦ Δ Total for Semester I 450 18 7 13 75 225 300 Taxonomy of Angiosperms, BO 221 Economic Botany & Ethnobotany 108 6 2.5 3 25 75 100 Environmental Biology, Forest BO 222 Botany, Phytogeography & 108 6 2 3 25 75 100 Conservation Biology II Cell Biology, Genetics & Evolution BO 223 108 6 2.5 3 25 75 100 Practical I 100♦ BO 224 Practical II 126 7 4 25 75 100 BO 225 Submission I* (I A+1B) 25+25 50 Total for Semester II 450 18 7 13 100 350 550 Plant Breeding, Horticulture & BO 231 108 6 1.5 3 25 75 100 Biostatistics Biochemistry, Plant Physiology BO 232 & Research Methodology 108 6 3 3 25 75 100 III Molecular Biology, Immunology & BO 233 108 6 2.5 3 25 75 100 Plant Biotechnology BO 234 Practical III 126 7 4 25♦♦ 75♦♦ Δ Δ Total for Semester III 450 18 7 13 75 225 300 Special Paper –I BO 241 Bioinformatics & Biophysics 144 8 2 3 25 75 100 BO 242 Special Paper –II Elective 144 8 5 3 25 75 100 Practical III 100♦♦ IV BO 243 Practical IV 126 7 4 25 75 100 BO 244 Dissertation 36 2 100 100 BO 245 Submissions II** 50 50 BO 246 Comprehensive Viva Voce 25 .
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Plant Evolution Acetabularia Is a Genus of Green Algae
Botany – Plant Evolution Acetabularia is a genus of green algae, specifically of the Polyphysaceae family. Typically found in subtropical waters, Acetabularia is a single- celled organism, but gigantic in size and complex in form, making it an excellent model organism for studying cell biology. The name, Acetabularia, derives from the Latin word acetabulum, a broad, shallow cup used for dipping bread; the upturned cap of Acetabularia resembles such a cup. For this reason, it is also sometimes called mermaid's wineglass.[6] Acetabularia was the first demonstration that genes are encoded by DNA in eukaryotes. Cladophora is a genus of reticulated filamentous Ulvophyceae (green algae). The genus Cladophora contains many species that are very hard to tell apart and classify, mainly because of the great variation in their appearances, which is affected by habitat, age and environmental conditions. Unlike Spirogyra the filaments of Cladophora branch and it doesn't undergo conjugation. They have swimming gametes instead. There are two multicellular stages in its life cycle - a haploid gametophyte and a diploid sporophyte - which look highly similar. The only way to tell the two stages apart is to either count their chromosomes, or examine their offspring. The haploid gametophyte produces haploid gametes by mitosis and the diploid sporophyte produces haploid spores by meiosis. The only visible difference between the gametes and spores of Cladophora is that the gametes have two flagella and the spores have four. Cladophora is an invahsive species damaging the fishing industry and shoreline property values along the Great Lakes in the United States Chara species are multicellular and superficially resemble land plants because of stem-like and leaf-like structures.
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Plate. Acetabularia Schenckii
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Experiències Amb Acetabulària Informació Addicional Pel Professorat
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BMC Evolutionary Biology Biomed Central
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Plant Cell Physiol. 48(1): 122–133 (2007) doi:10.1093/pcp/pcl053, available online at www.pcp.oxfordjournals.org ß The Author 2006. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: [email protected] Spectroscopic and Biochemical Analysis of Regions of the Cell Wall of the Unicellular ‘Mannan Weed’, Acetabularia acetabulum Erin K. Dunn 1, 5, Douglas A. Shoue 2, 5, Xuemei Huang 3, Raymond E. Kline 4, Alex L. MacKay 3, Nicholas C. Carpita 2, Iain E.P. Taylor 4 and Dina F. Mandoli 1,Ã 1 Department of Biology, Center for Developmental Biology & Institute for Stem Cell and Regenerative Medicine, Box 35325, University of Washington, Seattle, WA 98195-5325, USA 2 Department of Botany and Plant Pathology, Purdue University, W. Lafayette, Indiana 47907-2054, USA 3 Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada V6T 1Z1 4 Department of Botany, University of British Columbia, Vancouver, BC, Canada V6T 1Z4 Downloaded from https://academic.oup.com/pcp/article/48/1/122/2469303 by guest on 29 September 2021 Although the Dasycladalean alga Acetabularia acetabulum Introduction has long been known to contain mannan-rich walls, it is not known to what extent wall composition varies as a function of The Mediterranean coralline alga Acetabularia the elaborate cellular differentiation of this cell, nor has it acetabulum (previously classified as A. mediterranea)isa been determined what other polysaccharides
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Genome of an Acetabularia Mediterranea Strain (Southern Blot/Molecular Cloning/Dasycladaceae/Evolution) MARTIN J
Proc. Natl. Acad. Sci. USA Vol. 82, pp. 1706-1710, March 1985 Cell Biology Tandemly repeated nonribosomal DNA sequences in the chloroplast genome of an Acetabularia mediterranea strain (Southern blot/molecular cloning/Dasycladaceae/evolution) MARTIN J. TYMMS AND HANS-GEORG SCHWEIGER Max-Planck-Institut fur Zellbiologie, D-6802 Ladenburg, Federal Republic of Germany Communicated by Philip Siekevitz, October 29, 1984 ABSTRACT A purified chloroplast fraction was prepared the life cycle and that are not homologous to heterologous from caps of the giant unicellular green alga Acetabularia probes for ribosomal RNA genes. mediterranea (strain 17). High molecular weight DNA obtained from these chloroplasts contains at least five copies of a MATERIALS AND METHODS 10-kilobase-pair (kbp) sequence tandemly arranged. This Preparation of Chloroplasts. A. mediterranea was grown in unique sequence is present in DNA from chloroplasts of all Muller's medium as described (for references, see ref. 9). stages of the life cycle examined. A chloroplast rDNA clone Cells of three different stages, 1 cm long, 3.5 cm long (i.e., from mustard hybridized with some restriction fragments just prior to cap formation), and fully developed caps (9) from Acetabularia chloroplast DNA but not with the repeated were studied. sequence. An 8-kbp EcoRI-.Pst I fragment of the repeated Caps from A. mediterranea cells were harvested prior to sequence was cloned into pBR322 and used as a hybridization the formation of secondary nuclei. Five-thousand caps probe. No homology was found between the cloned 8-kbp ('100 g) were homogenized in a blender fitted with razor sequence and chloroplast DNA from related species blades on a vertical shaft in 1 liter of ice-cold buffer A Acetabularia crenulata or chloroplast DNA from spinach.
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Caulerpa Taxifolia
Semiosis aspects of ecosystems of the invasive Caulerpa taxifolia Urbino (Italia, 2005) Contributors Maricela YIP & Pierre MADL http://www.sbg.ac.at/ipk/avstudio/pierofun/ct/caulerpa.htm 0 Intro Properties Semiosis Analysis Conclusion What is Caulerpa taxifolia ? (1/2) Taxonomy: C.taxifolia is a marine plant grouped into Division: Chlorophyta Class: Chlorophyceae Order: Bryopsidales Family: Caulerpaceae Genus: Caulerpa (J.V.F. Lamouroux, 1809) Species: Caulerpa taxifolia (Vahl) C.Ag., 1817) 05-07-17 Yip / Madl 1 i) The Chlorophyta (green algae) groups unicellular or multicellular photosynthetic organisms characterized by the presence of chlorophyll a and b, as well as various carotenoids. The carbohydrate food reserve is starch, which is stored in plastids. There are about 7000 known species. ii) The Ulvophyceae is one of the 3 classes currently recognized in the chlorophyte lineage, the others being Chlorophyceae and Trebouxiophyceae (formerly Pleurastrophyceae) and is made up of approximately 1100 species clustered among 100 genera. Most of which are found in temperate and tropical marine environments, and the majority of green "seaweeds", including well-known species of besides Ulva and Acetabularia besides Caulerpa, are placed in this class as well. Conversely, the Chlorophyceae and Trebouxiophyceae, and the Streptophytes, consist almost entirely of non-marine organisms. In classifications based on morphology and ultrastructure, the Ulvophyceae have been separated from other chlorophytes mostly on the basis of characters associated with mitosis, cytokinesis, and the flagellar apparatus of zoospores and gametes. In molecular analyses, however, the relationships among these three classes are less clear. Moreover, the "siphonous" orders of Ulvophyceae (Cladophorales, Dasycladales, Caulerpales) are difficult to resolve vis- à-vis each other and with other Ulvophyceae (orders Ulotrichales and Ulvales); phylogenetic trees based on single gene sequences reveal long branch lengths between "siphonous" sequences and those of other chlorophytes.
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Compartmentalization of Mrnas in the Giant, Unicellular Green Algae
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