gracilaria biology discussion

They are O2 producing photosynthetic organisms. 150 currently recognised species is an important component of the flora on most trop-ical to cool temperate shores. In mice, Gc‐TSP (3, 9 or 27 mg/kg) significantly reduced nociceptive responses, as measured … tetraspores of Gracilaria vermiculophylla (Ohmi) Papenfuss (Gracilariales, Rhodophyta) Xiujun Xie1, Guangce Wang*1,2, Guanghua Pan1, Shan Gao1, Pu Xu3 and Jianyi Zhu3 Abstract Background: Red algae are primitive photosynthetic eukaryotes, whose spores are ideal subjects for studies of photosynthesis and development. Rev. L in S.-M., L iu L.-C. and P ayri C. 2012. In this study, we evaluated the effects of SP from the red seaweed Gracilaria cornea (Gc‐TSP) in nociceptive and inflammatory models. Materials. 3. … Physical responses and growth on tissue culture of agarophytic seaweed, Gracilaria fisheri (Xia and Abbott) Abbott, Zhang, and Xia (Gracilariales, Rhodophyta). The fresh red tilapia were prepared to form the fillets and then soaked for 30 min in Gracilaria sp. This is a modular and branched seaweed (Figure 1 ) that can grow attached to rocks, buried in the sand or free living, either in the intertidal or subtidal zone (Bird, McLachlan, & Oliveira, 1986 ). Estela M. Plastino, Melina Guimarães, Sergio R. Matioli and Eurico C. Oliveira Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461, 05422-970 São Paulo, SP, Brasil. Gracilaria red algae are notable for their economic importance as agrophytes, sold as salad vegetable, and used as the base for selected food and nonalcoholic beverages. ... designate the taxon merely as Gracilaria sp. Both terrestrial plants and marine macroalgae produce a rich variety of secondary metabolites that can function as defences against herbivores , .These defence metabolites can be constitutively expressed or induced, whereby the production is increased in response to the attack. An extensive part of chemical ecology research focuses on plant-herbivore interactions. 2.0 Biology of Gracilaria. Therefore, the lagoon is a deposit of bioresources whose economic value can be enhanced. In effect, a full knowledge of the plant's biology and. The cortex was found 1-2 layered in G. edulis and G. eucheumatoides whereas 5-6 layered in G. foliifera and G. crassa. ISC 11, TGES BIOLOGY -2014 1 HABITAT: ALGAE (L. Seaweed) SALIENT FEATURES: 1. Media in category "Gracilaria" The following 6 files are in this category, out of 6 total. Algae are autotrophic organisms and they have chlorophyll. liui in Fujian. The genus Gracilaria is currently the major source of SPs worldwide, and various studies have been done on their biology, ecology and phycocolloid characterization (Pomin and Mourão 2008). 2.1 Influence of environmental factors on spore release The chloroplast genome of Gracilaria firma was sequenced in view of its role as an economically important marine crop with wide industrial applications. Carbon dioxide fixation through photosynthesis. Sargassum, Gracilaria and Ulva Exhibit Positive Antimicrobial Activity against Human Pathogens () Amrit Kumar Mishra 1,2* 1 Department of Ocean Studies and Marine Biology, School of Life Sciences, Pondicherry University, Brookshabad Campus, Portbalir, Andaman and Nicobar Islands, India . 4. Characterization of Gracilaria vieillardii (Gracilariaceae, Rhodophyta) and molecular phylogeny of foliose species from the western Pacific Ocean, including a description of G. taiwanensis sp. Genomic DNA was isolated from the Gracilaria vermiculophylla (GRV) and G. chorda (GRC) from Jangheung located in the southern sea of the Korean Peninsula, respectively and we performed clustering analyses, DNA polymorphisms and the genetic differences. with ca. Microsatellite markers were developed from the chloroplast genome of G. tenuistipitata var. A wild population of Gracilaria exists in coastal areas of Sarawak, Malaysian Borneo, but there is only limited knowledge on species diversity and its abundance leaving the untapped economic potential of this resource. Kanten (agar) is one of the health foods because it contains no calories and has dietary fiber for about 80 % of its ingredients. Red algae, like Gracilaria, Gelidium, Euchema, Porphyra, Acanthophora, and Palmaria are primarily known for their industrial use for phycocolloids (agar, algin, furcellaran and carrageenan) as thickening agent, textiles, food, anticoagulants, water-binding agents etc. Such a plant body is called thallus. It grows fast and has high agar content. Background. 8403938 Penniman, Clayton Arthur ECOLOGY OF GRACILARIA TIKVAHIAE MCLACHLAN (GIGARTINALES, RHODOPHYTA) IN THE GREAT BAY ESTUARY, NEW HAMPSHIRE University of … Red algae are primitive photosynthetic eukaryotes, whose spores are ideal subjects for studies of photosynthesis and development. Assessment of Native Agar Gels Extracted from Gracilaria debilis and Gracilaria salicornia Harvested Along the Tanzanian Coast for Culturing Microorganisms Amelia K. Kivaisi1* and Amelia S. Buriyo2 1Department of Molecular Biology and Biotechnology, University … Seaweeds (SW) contain biologically active substances with efficient antioxidant capacities. and Developmental Utilization: Main Issues and Prospective. Three kinds of red algae Gracilaria were identified by a corresponding author. nov. Phycologia 51: 421–431. Although the development of red alga spores has received considerable research attention, few studies have focused on the detailed morphological and photosynthetic changes that occur during the early development of tetraspores of Gracilaria … Many of these compounds are used to treat diseases like cancer, acquired immune-deficiency syndrome (AIDS), inflammation, pain, arthritis, as well as viral, bacterial, and fungal infections. You get a full plant not a frag. The genus Gracilaria Grev. extract solution with a concentration of 0, 0.5, 1, 1.5 and 2% then drained for 15 min. Red algae Gracilaria (G. asiatica, G. bailinae, and G. lemaneiformis) were obtained from Chenghai district agar glue factory (Shantou, China).Specimens of Gracilaria were harvested in April (2013) in Nan’ao County (23°28′46.23″N and 117°06′24.58″E) in Shantou, China. Introduction. The most common agarophytic alga in southeast Brazil is a Gracilaria species that has been studied by several authors because of its putative commercial value. This study on Gracilaria fisheri tissue culture was aimed at optimizing the growth conditions for strain maintenance. As an agarophyte, ... Chen P, Shao H B, Xu D, Qin S (2009).Pr ogress in Gracilaria Biology . Discussion. The red seaweed Gracilaria chilensis (Rhodophyta) occurs in estuarine habitats, where salinity is highly variable. This study reports the morphological, anatomical and agar content difference among various species of Gracilaria. The anti-inflammatory mechanisms of the sulfated polysaccharidic fraction obtained from red marine alga Gracilaria cornea (Gc-FI) were investigated using a paw edema model induced in rats by different inflammatory agents (carrageenan, dextran, serotonin, bradykinin, compound 48/80 or L-arginine). In algae the plant body shows no differentiation into root, stem or leaf or true tissues. The Ogo Plant, Gracilaria sp. 2. Although, Gracilaria spp. Results. There were no noticeable A discussion on the techniques of artificial cultivation of Gracilaria tenuistipitata var. In these conditions, fish may be exposed to suboptimal dissolved O2 levels with an increased formation of reactive O2 species (ROS) in tissues. The discovery of new bioactive natural products is still a fascinating field in organic chemistry as demonstrated by the recent paradigms of the anticancer drug epothilon, the immunosuppressant rapamycin, or the proteasome inhibitor salinosporamide, to name but a … An invasive foundation species enhances multifunctionality in a coastal ecosystem Aaron P. Ramusa,b,1, Brian R. Sillimana, Mads S. Thomsenc,d, and Zachary T. Longb aDivision of Marine Science and Conservation, Nicholas School of the Environment, Duke University, Beaufort, NC 28516; bDepartmentofBiologyandMarine Biology, University of North Carolina Wilmington, Wilmington, NC … The Gracilaria species are distributed throughout the tropical regions of the world. RESULTS AND DISCUSSION Tolerance The results of all experiments are summarized in Figure 1. Naturalis Biodiversity Center - L.4049826 - Gracilaria vieillardii P.C.Silva - Algae - Plant type specimen.jpeg 1,126 × 1,920; 224 KB Convenor: C. van den Hoek. Gracilaria tenuistipitata is an agarophyte with substantial economic potential because of its high growth rate and tolerance to a wide range of environment factors. Gracilaria (G. aculeata , G. beckeri and G. capensis ) are endemic or near endemic to the South African coast, and a fourth species, G. denticulatais localised in southeast Africa. One of natural preservatives from marine is the extract of Gracilaria sp. To date, there are only 15 chloroplast genomes published for the Florideophyceae. Our knowledge of non-native algae in benthic estuarine habitats is relatively poor, especially compared to algal introductions along open shores or on floating structures. DISCUSSION . Intensive aquaculture practices involve rearing fish at high densities. Plant Physiol. Seaweeds are an important source of bioactive metabolites for the pharmaceutical industry in drug development. This red seaweed is intensively cultured in China for the production of agar and fodder for abalone. The medulla was 6-8 layered in G. edulis, 10-11 layered in G. foliifera, 14-15 layered in G. eucheumatoides and 8-10 layered in G. crassa. Investigations have included aspects of physiology, ecology, life history, hybridization, molecular biology, and mariculture. Gracilaria verrucosa is the most common species in China. Journal of Jimei University (Natural Sci.) Gracilaria firma and G. changii are among the commercially important agarophytes from the western Pacific; both feature branches with … Chen, C. S. and J. R. Zhang, 1999. Gracilaria sp. The chloroplast genome of Gracilaria firma maps as a circular molecule of 187,001 bp and contains 252 genes, which are distributed on both strands and consist of 35 RNA genes (3 rRNAs, 30 tRNAs, tmRNA and a ribonuclease P RNA component) and 217 protein-coding genes, including the unidentified open reading frames. Nguyen, P. T.; Ruangchuay, R., and Lueangthuwapranit, C., 2016. contain both the C18 and C20 fatty acid oxidative pathways, ... Reactive species and antioxidants—redox biology is a fundamental theme of aerobic life. on Seaweed Biogeography, held from 3-7 April 1984 at the Department of Marine Biology, Rijksuniversiteit Groningen (The Netherlands). The Gracilaria bursa-pastoris is an abundant alga that is responsible for the eutrophication in Nador lagoon in Morocco. Following is a discussion on the influence of the various environmental factors on the release and germination of spores and growth of thallus of the spores. Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta). Abstract: Seaweeds have attracted special interest as good sources of sulphated polysaccharides (SP) for use in pharmaceutical industries and biotechnology. 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