Phlorotannins In Intertidal Brown Algae

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Phlorotannins In Intertidal Brown Algae

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Author : Elisabet Brock
language : en
Publisher:
Release Date : 2006

Phlorotannins In Intertidal Brown Algae written by Elisabet Brock and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Brown algae categories.

Effects Of Phlorotannins On A Marine Intertidal Gastropod Littorina Scutulata

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Author : Kai Elgethun
language : en
Publisher:
Release Date : 1994

Effects Of Phlorotannins On A Marine Intertidal Gastropod Littorina Scutulata written by Kai Elgethun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Fucus gardneri categories.

A comparative study of the littorine or periwinkle snails from two beaches of south Puget Sound, some of which feed on a brown algae (Fucus gardneri) that contains phlorotannins. Laboratory growth tests were performed on snails to determine the effects of dietary phlorotannin levels.

The Application Of Molecular Tools Towards The Study Of Brown Algal Chemical Ecology And The Production Of Phlorotannins

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Author : Karen Nicole Pelletreau
language : en
Publisher: ProQuest
Release Date : 2008

The Application Of Molecular Tools Towards The Study Of Brown Algal Chemical Ecology And The Production Of Phlorotannins written by Karen Nicole Pelletreau and has been published by ProQuest this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Brown algae categories.

Phlorotannins occur exclusively in marine brown algae, where they are a major group of secondary metabolites comprising up to 20-30% dry mass in some species. While at times there appear to be patterns associated with phlorotannin concentration and distribution, the interpretation of these patterns in terms of phlorotannin function is often confounded by methodological, temporal, spatial and phylogenetic variability. To clearly understand the underlying factors that affect phlorotannin production, it is critical that the cellular and molecular processes involved in phlorotannin synthesis be identified and that their regulation addressed at the molecular level. Quantification of phlorotannin concentration is an important element of all phlorotannin studies. Current quantification methods are entirely reliant on colorimetric or microscopic approaches. This study explores methods to streamline existing colorimetric assays (Chapter 2). The results suggest the use of a 96 well high-throughput format, with shorter incubation times and the use of sodium dodecyl sulfate as a denaturant, decreases overall processing time and increases experimental power. The molecular approach used in this study explored biosynthetic and genetic processes involved in phlorotannin synthesis. Because of the reactivity of phlorotannins, molecular studies on brown algae have proven challenging. An initial, target specific PCR-based approach to amplify genes of secondary metabolism in Fucus vesiculosus proved unsuccessful (Chapter 3), therefore a broader more inclusive approach of suppressive subtractive hybridization (SSH) was used to characterize gene expression in phlorotannin producing algae. These SSH cDNA libraries generated 165 novel genes from Fucus vesiculosus . In the first library, gene expression in adventitious branches, which constitutively produce higher phlorotannins than vegetative branches, was investigated in the context of resource allocation (Chapter 4). Although investment into phlorotannin production was high in these branches, genes from the SSH cDNA library were primarily those involved in photosynthesis, growth and primary metabolism, contradicting the prediction of the optimal defense model of resource allocation (Chapter 4). Induction of phlorotannin production using a known signaling molecule, volatile methyl jasmonate (MeJA) was investigated (Chapter 5). Temporal changes in response to MeJA were observed, with a significant induction of phlorotannin synthesis occurring after a two week period. Perception of the volatile signal occurred regardless of season (winter vs. summer) or of application (volatile vs. direct exposure), and while algae were both submerged and emersed. Gene expression patterns supported a stress response in the algae treated with MeJA, and several up-regulated genes were suggestive of an octadecanoid-like/volatile signaling pathway in brown algae. Many of the genes characterized in this study have potential application for ecological study. This initial investigation of the molecular underpinnings of phlorotannins synthesis is a step towards generating direct links between environmental cues and expression of metabolic enzymes, an understanding of which will ultimately enhance the development of ecological models to explain the functional role of phlorotannins and in brown algae. In turn, this will result in a better characterization of the primary factors that shape intertidal and subtidal ecology.

Mosaic Distribution Of Chemical Defenses In A High Intertidal Alga

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Author : Nathan B. Eckrich
language : en
Publisher:
Release Date : 1997

Mosaic Distribution Of Chemical Defenses In A High Intertidal Alga written by Nathan B. Eckrich and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.

Phlorotannins As Uv Protective Substances In Early Developmental Stages Of Brown Algae

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Author : Franciska S. Steinhoff
language : en
Publisher:
Release Date : 2010

Phlorotannins As Uv Protective Substances In Early Developmental Stages Of Brown Algae written by Franciska S. Steinhoff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

The Osmotic Physiology Of Intertidal Brown Algae

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Author : Philip James Wright
language : en
Publisher:
Release Date : 1988

The Osmotic Physiology Of Intertidal Brown Algae written by Philip James Wright and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Alginates categories.

Blue Biotechnology

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Author : Stephane La Barre
language : en
Publisher: John Wiley & Sons
Release Date : 2018-09-06

Blue Biotechnology written by Stephane La Barre and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-06 with Science categories.

With its integral treatment of ecosystem and resource management, this is the only overview of the field to address current thinking and future trends. All contributions have been written with the novice in mind, explaining the basics and highlighting recent developments and achievements. Unmatched in scope, this two-volume reference covers both traditional and well-established areas of marine biotechnology, such as biomass production, alongside such novel ones as biofuels, biological protection of structures and bioinspired materials. In so doing, it ties together information usually only found in widely dispersed sources to assemble a grand unified view of the current state of and prospects for this multi-faceted discipline. The combination of the breadth of topics and the focus on modern ideas make this introductory book especially suitable for teaching purposes and for guiding newcomers to the many possibilities offered by this booming field.

Seaweed Biology

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Author : Christian Wiencke
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-06-06

Seaweed Biology written by Christian Wiencke and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-06-06 with Science categories.

Seaweeds, also known as macroalgae, are among the most important primary producers and act as ecological engineers on rocky coasts of the world’s oceans. In addition to their extreme ecological importance they are also of high economic relevance. Complementing available textbooks with its more research-oriented approach, this volume contains 22 chapters by renowned experts, grouped in five parts. In Part I fundamental processes and acclimation strategies of seaweeds towards the abiotic environment are covered. Part II focuses on the multitude of biotic interactions in seaweed communities, and in Part III the reader is introduced to the structure and function of the main seaweed systems of the world. The chapters of Part IV highlight and discuss the effects of global and local environmental changes on seaweeds and their communities. In the final Part V a comprehensive overview of developments in seaweed aquaculture, industrial applications and the overall economic importance of seaweeds is provided. Summarizing the advances in seaweed biology achieved within the last few decades, this book also identifies gaps in the present knowledge and needs for future research.

In Situ Rates Of Phlorotannin Synthesis Polymerization And Turnover In Marine Brown Algae

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Author : Thomas M. Arnold
language : en
Publisher:
Release Date : 1998

In Situ Rates Of Phlorotannin Synthesis Polymerization And Turnover In Marine Brown Algae written by Thomas M. Arnold and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Brown algae categories.

Antarctic Seaweeds

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Author : Iván Gómez
language : en
Publisher: Springer Nature
Release Date : 2020-04-29

Antarctic Seaweeds written by Iván Gómez and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-29 with Science categories.

Seaweeds (macroalgae) represent the most striking living components in the Antarctic’s near-shore ecosystems, especially across the West Antarctic Peninsula and adjacent islands. Due to their abundance, their central roles as primary producers and foundation organisms, and as sources of diverse metabolically active products, seaweed assemblages are fundamental to biogeochemical cycles in Antarctic coastal systems. In recent years, the imminence of climate change and the direct impacts of human beings, which are affecting vast regions of the Antarctic, have highlighted the importance of seaweed processes in connection with biodiversity, adaptation and interactions in the benthic network. Various research groups have been actively involved in the investigation of these topics. Many of these research efforts have a long tradition, while some “newcomers” have also recently contributed important new approaches to the study of these organisms, benefiting polar science as a whole. This book provides an overview of recent advances and insights gleaned over the past several years. Focusing on a timely topic and extremely valuable resource, it assesses the challenges and outlines future directions in the study of Antarctic seaweeds.