Evaluation of Genes Encoding the Enzymes of the Kennedy Pathway in Soybeans with Altered Fatty Acid Profiles PDF Download
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Author: Amy J. M. McNaughton
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Amy J. M. McNaughton
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
![Suppression of Phospholipase D[Alpha] in Soybean PDF](https://books.google.com/books/content/images/frontcover/dh74jwEACAAJ?fife=w80-h100)
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Languages : en
Pages :
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Book Description
Demands on value-added crops have been raised to improve agricultural, industrial, and economical value. Currently, transgene application is one of most effective methods to satisfy these demands. Success in herbicide-resistant soybean (Glycine max (L.) Merr.) has boosted genetic engineering to be used for biochemical, nutritional, cultural, and physiological improvements. The objectives of this study were to establish transgenic soybean lines with attenuated phospholipase D[Alpha] (PLD[Alpha]) activity in the seed, test the alteration of fatty acid profiles affected by transgene and somaclonal variation, and evaluate the physiological alteration of transgenic lines by both transgene and somaclonal variation. To change fatty acid profile in soybean seed, we attenuated PLD[Alpha] enzyme activity by an RNA interference construct using the PLD[Alpha] gene sequence. Two transgenic soybean lines were established by particle inflow gun bombardment of co-bombarding pSPLDi and pHG1 transgenes, and evaluated for the presence and expression of transgenes thoroughly through the T[subscript]5 generation. PLD[Alpha]-suppressed soybean lines were characterized by decreased PLD[Alpha] enzyme activity and PLD[Alpha] protein both during seed development and in mature seeds. The PLD[Alpha]-attenuated transgenic lines, SW1-7-1-1 and SW1-7-1-2, contain 36% and 49% oleic acid in the filed and greenhouse evaluations, respectively, which are equivalent to the mid-oleic acid soybean lines improved by conventional breeding and mutagenesis. Phenotypic and genetic analysis of the transgenic lines suggested the possibility that the multi-copy transgene integration formed direct or indirect repeats by random ligation during integration and organization of transgenes in the soybean genome, and the transgene cluster with tandem repeats may consequently increase the probability of transgene silencing. Various factors, such as high humidity and temperature, result in the loss of seed viability. Fayette seed stored for two months since harvest exhibited about 95% viability; however Fayette seeds stored for 33 months at room temperature and uncontrolled relative humidity become non-viable. PLD[Alpha]-attenuated transgenic soybean seeds have been produced by transformation. PLD-suppressed transgenic soybean seeds have maintained viability when stored for 33 months at room temperature. Germination of transgenic seed stored for 33 months ranged from 30 to 50%. Increased leakage of electrolytes associated with the loss of viability was observed in null-transgenic and background seeds versus transgenic seed. The increase in electrolyte leakage may have been induced by lipid peroxidation and free radical formation which can generate oxidative damage in the cell and subsequently decrease seed viability. Differences in the ultrastructure of cotyledon tissue were observed between PLD[Alpha]-suppressed soybean and the background cultivar. The loss of viability in the background cultivar was consistent with observations of the plasma membrane being detached from the cell wall complex and disorganization of oil bodies. Stresses caused by temperatures higher or lower than ambient are one of agricultural problems that reduce crop productivity in many areas and diverse species. To overcome the uncertainty of environmental fluctuations, efforts continue to improve high and low temperature tolerance in crops. PLD[Alpha]-suppressed transgenic events were produced by antisense suppression driven by constitutive and seed-specific promoters using the particle inflow gun (PIG) bombardment method. Nine fertile transgenic events suppressed the expression of PLD[Alpha] protein. PLD[Alpha] enzyme activity in T[subscript]1 seed was observed to be reduced by 25 percent compared to the non-transgenic control. When soybean seedlings were exposed to lethal freezing temperature, increased electrolyte leakage associated with oxidative damage and biophysical changes were observed in non-transgenic soybean, whereas membrane stability and integrity were maintained in transgenic soybean seedlings. The early growth of PLD[Alpha]-attenuated soybean seedlings was recovered from extreme heat-shock (45 °C) and freezing treatments ( -8 °C). The disruption of the plasma membrane and organelles was observed in freeze-stressed non-transgenic control seedlings. On the other hand, the structures of the plasma membrane, oil bodies, and cell organelles in transgenic seedlings were partially sustained after enduring freezing and thawing stresses.
Author: J.C. Kader
Publisher: Springer Science & Business Media
ISBN: 9401583943
Category : Science
Languages : en
Pages : 598
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A collection of papers that comprehensively describe the major areas of research on lipid metabolism of plants. State-of-the-art knowledge about research on fatty acid and glycerolipid biosynthesis, isoprenoid metabolism, membrane structure and organization, lipid oxidation and degradation, lipids as intracellular and extracellular messengers, lipids and environment, oil seeds and gene technology is reviewed. The different topics covered show that modern tools of plant cellular and molecular biology, as well as molecular genetics, have been recently used to characterize several key enzymes of plant lipid metabolism (in particular, desaturases, thioesterases, fatty acid synthetase) and to isolate corresponding cDNAs and genomic clones, allowing the use of genetic engineering methods to modify the composition of membranes or storage lipids. These findings open fascinating perspectives, both for establishing the roles of lipids in membrane function and intracellular signalling and for adapting the composition of seed oil to the industrial needs. This book will be a good reference source for research scientists, advanced students and industrialists wishing to follow the considerable progress made in recent years on plant lipid metabolism and to envision the new opportunities offered by genetic engineering for the development of novel oil seeds.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309039940
Category : Medical
Languages : en
Pages : 765
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Book Description
Diet and Health examines the many complex issues concerning diet and its role in increasing or decreasing the risk of chronic disease. It proposes dietary recommendations for reducing the risk of the major diseases and causes of death today: atherosclerotic cardiovascular diseases (including heart attack and stroke), cancer, high blood pressure, obesity, osteoporosis, diabetes mellitus, liver disease, and dental caries.
Author:
Publisher:
ISBN:
Category : Polycyclic aromatic hydrocarbons
Languages : en
Pages : 500
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Author: Gary Stacey
Publisher: Springer Science & Business Media
ISBN: 0387722998
Category : Science
Languages : en
Pages : 405
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Book Description
Soybean genomics is of great interest as one of the most economically important crops and a major food source. This book covers recent advances in soybean genome research, including classical, RFLP, SSR, and SNP markers; genomic and cDNA libraries; functional genomics platforms; genetic and physical maps; and gene expression profiles. The book is for researchers and students in plant genetics and genomics, plant biology and pathology, agronomy, and food sciences.
Author: Anna Stina Sandelius
Publisher: Springer Science & Business Media
ISBN: 3540686967
Category : Science
Languages : en
Pages : 307
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Book Description
Chloroplasts are vital for life as we know it. At the leaf cell level, it is common knowledge that a chloroplast interacts with its surroundings – but this knowledge is often limited to the benefits of oxygenic photosynthesis and that chloroplasts provide reduced carbon, nitrogen and sulphur. This book presents the intricate interplay between chloroplasts and their immediate and more distant environments. The topic is explored in chapters covering aspects of evolution, the chloroplast/cytoplasm barrier, transport, division, motility and bidirectional signalling. Taken together, the contributed chapters provide an exciting insight into the complexity of how chloroplast functions are related to cellular and plant-level functions. The recent rapid advances in the presented research areas, largely made possible by the development of molecular techniques and genetic screens of an increasing number of plant model systems, make this interaction a topical issue.
Author: Denis J. Murphy
Publisher: John Wiley & Sons
ISBN: 1405148128
Category : Science
Languages : en
Pages : 424
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Book Description
New research tools have revealed many surprising aspects of thedynamic nature of lipids and their participation in processes suchas recognition, intra- and inter-cellular signalling, deterrenceand defence against pathogens, membrane trafficking and proteinfunction. This is in addition to new information on the moreestablished roles of plant lipids as structural components ofmembranes and as long-term storage products. Plant lipids are alsoincreasingly being seen as sources of a new generation ofenvironmentally friendly, biodegradable and renewable industrialproducts, including biopolymers and high grade lubricants. This volume provides a broad overview of plant lipid researchand its many applications, linking the various disciplines andproviding an interesting and wide-ranging perspective on thisfast-moving field. Extensive lists of references are provided,totalling well over two thousand non-redundant citations andoffering a point of entry to the detailed literature. This is a book for researchers and professionals in plantbiochemistry, molecular biology, biotechnology and genetics, inboth the academic and industrial sectors.
Author: W. W. Christie
Publisher: Elsevier
ISBN: 0857097865
Category : Technology & Engineering
Languages : en
Pages : 447
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Book Description
This well-known and highly successful book was first published in 1973 and has been completely re-written in subsequent editions (published in 1982 and 2003). This new Fourth Edition has become necessary because of the pace of developments in mass spectrometry of intact lipids, which has given recognition of lipid analysis and ‘lipidomics’ as a distinct science. To bring the book up to date with these developments, author William W. Christie is joined by co-author Xianlin Han. Although devoting considerable space to mass spectrometry and lipidomics, Lipid analysis remains a practical guide, in one volume, to the complexities of the analysis of lipids. As in past editions, it is designed to act as a primary source, of value at the laboratory bench rather than residing on a library shelf. Lipid analysis deals with the isolation, separation, identification and structural analysis of glycerolipids, including triacylglycerols, phospholipids, sphingolipids, and the various hydrolysis products of these. The chapters follow a logical sequence from the extraction of lipids to the isolation and characterization of particular lipid classes and of molecular species of each, and to the mass spectrometric analysis of lipids and lipidomics. The new influence of mass spectrometry is due mainly to the development of electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI). Most emphasis in this book is placed on ESI, which is enabling structural characterization of different lipid classes and the identification of novel lipids and their molecular species.
Author: Dennis E. Vance
Publisher: CRC Press
ISBN: 1000098753
Category : Medical
Languages : en
Pages : 260
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Book Description
This book is the first to be published as a single source reference on phosphatidylcholine metabolism. It provides a cogent and timely summary of research in this topic. Beginning with a chapter by Eugene Kennedy providing an historical perspective; the book proceeds to describe the latest developments in enzymes involved in phosphatidylcholine biosynthesis. Biological chemists, students, and investigators in the field of lipid metabolism will find this book of great benefit in their research.
