Transposable elements are short lengths of DNA with the capacity to move between different points within a genome. This process can affect the function of genes at or near the insertion site. The present book gives an overview of the impact of transposable elements on plant genomes and explains how to recognize and study transposable elements, e.g. by using state-of-the-art strategies like "new generation sequencing." Moreover, the impact of transposable elements on plant genome structure and function is reviewed in detail, and also illustrated in examples and case studies. The book is intended both for readers familiar with the field and for newcomers. With large-scale sequencing becoming increasingly available, more and more people will come across transposable element sequences in their data, and this volume will hopefully help to convince them that they are not just "junk DNA."

"Fungal-Plant Interactions" is a synthesis of fungal physiology, plant pathology and biology for undergraduates and researchers. Interactions between higher plants and fungi at the cellular and biochemical level are covered together with their ecological importance and theories as to their evolution. Interactions between fungi and higher plants are considered at the cellular and whole plant level. The book gives an integrated presentation of aspects of fungal physiology, whole plant physiology, plant physiology and fungal ecology which are so often approached as separate disciplines. A modern treatment of the effects of fungal invasion on host plant physiology and biochemistry is made by reference to current experimental work and the use of new techniques and approaches as examples. The significance of fungal growth habits and life-style is considered in terms of the interaction strategies adopted, from mutualistic to biotrophic and necrotrophic interactions. Current views concerning the ecological importance and evolution of these strategies is discussed.

By 1988 the Handbook of Vegetation Science is well on its way to completion. With 7 volumes in circulation, 3 volumes in the press, and most of the remaining volumes in preparation it appears that the total task can be completed in the early 'nineties. I am especially thankful to Professor Symoens for accepting the task of editing the volume on aquatic vegetation. The main emphasis of work in phytosociology is devoted to land plants, yet the landscape analysis remains incomplete without the consideration of rivers and lakes. Avolume on inland aquatic vegetation must therefore be most helpful to the land vegetation analyst and not only to the specialist on aquatic vegetation. Professor Symoens succeeded in drafting the most competent team for his task. I am sure that all colleagues working in vegetation analysis will be grateful to them that they have taken the time and energy to complete their chapters. Handbook articles are not easy to write and certainly not easy to edit. in the landscape are treated. The The major aquatic components vegetation analysts will welcome the fact that certain physiological and ecological processes of water plants are covered for which otherwise they would have to consult the limnological literature. This volume, together with the forthcoming volume on wetlands, should completely cover the inland aquatic vegetation problematic.

Programmed cell death (PCD) is a genetically encoded, active process which results in the death of individual cells, tissues, or whole organs. PCD plays an essential role in plant development and defense, and occurs throughout a plant's lifecycle from the death of the embryonic suspensor to leaf and floral organ senescence. In plant biology, PCD is a relatively new research area, however, as its fundamental importance is further recognized, publications in the area are beginning to increase significantly. The field currently has few foundational reference books and there is a critical need for books that summarizes recent findings in this important area. This book contains chapters written by several of the world's leading researchers in PCD. This book will be invaluable for PhD or graduate students, or for scientists and researchers entering the field. Established researchers will also find this timely work useful as an up-to-date overview of this fascinating research area.

Natural grasslands, pastures and meadows are among the vegetation types most frequently investigated with phytosociological methods. This was one of the reasons why volume 13, Application of vegetation science to grassland husbandry and agriculture, edited by W. Krause, appeared as one of the first volumes of this handbook. It appeared under the chief editorship of Prof. R. Tiixen and in his time main emphasis of the handbook was placed on Ziirich-Montpellier methods and the European vegetation. When we redesigned the handbook we felt the need to include other methods and aims of grassland analyses as well as a more global coverage of grasslands. Especially the natural dry and semidry areas of the world needed to be covered. was very fortunate in getting Prof. Tueller of the University of Reno I Nevada as an editor for this volume. He and the colleagues he motivated to compile volume 14 on Application of vegetation science to rangeland analysis and management have created a truly global coverage of the topics interesting for vegetation analyses in natural grasslands. Since volume 13 covered the problems of anthropogenically created grasslands, this topic was not expressly treated in order to avoid duplication. For the same reason no specific attempt was made to get more papers from Europe and the temperate forest region in general. The cooperation with Dr. Tueller has been very rewarding for me.

The aim of this book is to give an overview of the most important aspects of physiological and biochemical basis for metal toxicity and tolerance in plants. The book is expected to serve as a reference to university and college teachers, students of plant sciences, environmental biology, environmental biotechnology, agriculture, horticulture, forestry, plant molecular biology, and genetics.

Polyploidy - whole-genome duplication (WGD) - is a fundamental driver of biodiversity with significant consequences for genome structure, organization, and evolution. Once considered a speciation process common only in plants, polyploidy is now recognized to have played a major role in the structure, gene content, and evolution of most eukaryotic genomes. In fact, the diversity of eukaryotes seems closely tied to multiple WGDs. Polyploidy generates new genomic interactions - initially resulting in "genomic and transcriptomic shock" - that must be resolved in a new polyploid lineage. This process essentially acts as a "reset" button, resulting in genomic changes that may ultimately promote adaptive speciation. This book brings together for the first time the conceptual and theoretical underpinnings of polyploid genome evolution with syntheses of the patterns and processes of genome evolution in diverse polyploid groups. Because polyploidy is most common and best studied in plants, the book emphasizes plant models, but recent studies of vertebrates and fungi are providing fresh perspectives on factors that allow polyploid speciation and shape polyploid genomes. The emerging paradigm is that polyploidy - through alterations in genome structure and gene regulation - generates genetic and phenotypic novelty that manifests itself at the chromosomal, physiological, and organismal levels, with long-term ecological and evolutionary consequences.

This book is a collection of experimental studies demonstrating structure-function relationships in various biological systems having particular surface specialization to increase/decrease friction and adhesion. Studies on snake skin, adhesive pads, wing-interlocking devices and sticky mouthparts of insects as well as anti-adhesive and adhesive surfaces of plants are included in the volume containing four main subsections: (1) adhesion, (2) friction, (3) attachment-devices, (4) attachment-related behavior. Numerous experimental methods for characterizing tribological properties of biological surfaces at macro-, micro-, and nanoscale levels are demonstrated. This book is an excellent collection of publications on biotribology for both engineers and physicists working with biological systems as well as for biologists studying friction and adhesion. Inspirations from biology reported here may be also potentially interesting for biomimetics.

Since the beginning of agricultural production, there has been a continuous effort to grow more and better quality food to feed ever increasing popula tions. Both improved cultural practices and improved crop plants have allowed us to divert more human resources to non-agricultural activities while still increasing agricultural production. Malthusian population predictions continue to alarm agricultural researchers, especially plant breeders, to seek new technologies that will continue to allow us to produce more and better food by fewer people on less land. Both improvement of existing cultivars and development of new high-yielding cultivars are common goals for breeders of all crops. In vitro haploid production is among the new technologies that show great promise toward the goal of increasing crop yields by making similar germplasm available for many crops that was used to implement one of the greatest plant breeding success stories of this century, i. e., the development of hybrid maize by crosses of inbred lines. One of the main applications of anther culture has been to produce diploid homozygous pure lines in a single generation, thus saving many generations of backcrossing to reach homozygosity by traditional means or in crops where self-pollination is not possible. Because doubled haploids are equivalent to inbred lines, their value has been appreciated by plant breeders for decades. The search for natural haploids and methods to induce them has been ongoing since the beginning of the 20th century."

Peatlands are fascinating ecosystems. They are Boudewijn Beltman, Jon den Held, Harm Piek, inhabited by a wealth of especially adapted plant Drs. Niek van Heijst, Drs. Hermien van Sloch- species, such as peat mosses, insectivorous teren and Dr. Taeke Stol, who participated in plants, and nitrogen-fixing shrubs. They also the early stages of the process. The help of Drs. have a 'memory' often going back thousands of G. J. Baayens in the correction of chapter 5 is years, recorded in the layers of plant remains gratefully acknowledged. accumulated underneath the present plant cover. Chapters 6 and 7 have been supported by the Many peatlands are relatively low-productive foundation 'Oecologia Trajectina', Utrecht, by and species-rich, and show vegetational gradients supplying grants made available by the 'Prins related to water chemistry. Bernhard Fonds', Amsterdam and the 'Beij- Peatlands have long been recognized for many erinck-Popping Fonds', Amsterdam. I am indeb- values. The most conspicuous values appreciated ted to Marjolein Smithuizen and Dick Smit of for the Dutch mires were probably the great the Illustration division of the faculty of Biology, potential of the large nutrient stores in peat soils University of Utrecht, for the large number of for agricultural purposes, and the high calorific drawings they produced for the book. Gerrie value of peat when used as a fuel. These values Bransen helped with the printing of the final have led to large-scale exploitation and destruc- versions of the various chapters.

Since the beginning of agricultural production, there has been a continuous effort to grow more and better quality food to feed ever increasing popula tions. Both improved cultural practices and improved crop plants have alIowed us to divert more human resources to non-agricultural activities while still increasing agricultural production. Malthusian population predictions continue to alarm agricultural researchers, especially plant breeders, to seek new technologies that will continue to allow us to produce more and better food by fewer people on less land. Both improvement of existing cultivars and development of new high-yielding cultivars are common goals for breeders of alI crops. In vitro haploid production is among the new technologies that show great promise toward the goal of increasing crop yields by making similar germplasm available for many crops that was used to implement one of the greatest plant breeding success stories of this century, i. e., the development of hybrid maize by crosses of inbred lines. One of the main applications of anther culture has been to produce diploid homozygous pure lines in a single generation, thus saving many generations of backcrossing to reach homozygosity by traditional means or in crops where self-pollination is not possible. Because doubled haploids are equivalent to inbred lines, their value has been appreciated by plant breeders for decades. The search for natural haploids and methods to induce them has been ongoing since the beginning of the 20th century."

This proceedings is based on a joint meeting of the two IUFRO (International Union of Forestry Research Organizations) Working Parties, Somatic Cell Genetics (S2.04-07) and Molecular Genetics (S2.04-06) held in Gent, Belgium, 26-30 September, 1995. Although a joint meeting of the two Working Parties had been discussed in the past, this was the first such meeting that became a successful reality. In fact this meeting provided an excellent forum for discussions and interactions in forest bioteclUlology that encouraged the participants to vote for a next joint meeting. In the past decade rapid progress has been made in the somatic cell genetics and molecular genetics of forest trees. In order to cover recent developments in the broad area of biotechnology, the scientific program of the meeting was divided into several sessions. These included somatic embryogenesis, regeneration, transformation, gene expression, molecular markers, genome mapping, and biotic and abiotic stresses. The regeneration of plants, produced by organogenesis or somatic embryogenesis, is necessary not only for mass cloning of forest trees, but also for its application in genetic transformation and molecular biology. Although micropropagation has been achieved from juvenile tissues in a number of forest tree species, in vitro regeneration from mature trees remains a challenging problem in most hardwoods and conifers. The mechanisms involved in the transition from juvenile to mature phase in woody plants are poorly understood. This transition can now be investigated at the molecular level.

This volume will lay out the best methods for measuring net primary productivity (NPP) in ecological research. Primary productivity is the rate at which energy is stored in the organic matter of plants per unit area of the earth's surface. NPP is the beginning point of the carbon cycle, so our ability to accurately measure NPP is important. The book includes chapters for each of the critical biome types to offer special techniques that work best in each biome. For example, there are chapters that discuss grassland ecosystems, urban ecosystems, marine pelagic ecosystems, forest ecosystems, and salt marsh ecosystems, among others. All 26 LTER sites will be expected to collect and report data using these methods, but ecologists more generally should also find these methods useful and authoritative. Currently no standard methods or standards exist. Measuring NPP is fundamental to many ecosystem studies at thousands of sites, and having identified standards and methods would be extremely useful for comparing measurements among sites and for compiling a broad scale understanding of the environmental, biological, and nutrition controls on NPP. This book would resemble the Standard Soil Measurement volume in the LTER series in that it reaches well beyond any single LTER site to apply to any ecosystem. It should be rather more widely used than the soil measurements volume, in that measuring productivity is so fundamental to any ecological analyses as well as agronomy, forestry, fisheries, limnology and oceanography.

The Annual Beltsville Symposium serves as a forum for presenting recent developments in basic research that contribute solutions to agricultural problems. The eleventh in this series focuses on instrumentation tech niques which provide powerful new research tools. These tools will provide information that can lead to a better understanding of biological and physical processes critical to the solution of today's agricultural problems. The tools discussed include isotope technology, separation techniques, microscopy, electro-magnetic spectroscopy, resonance and mass spectrometry and microcomputers. This Symposium brought together scientists who are at the forefront of the development of many of these tools and those who are applying them to problems directly related to agricultural research. WALDEMAR KLASSEN, Director Beltsville Area VII CONTRIBUTORS AND THEIR AFFILIATIONS Norman G. Anderson Youhanna Fares Proteus Technologies, Inc. Phytokinetics Inc. Rockville, MD 20852 College Station, TX 77840 U.S.A. U.S.A. Cherie L. Fisk Edwin D. Becker Office of Research Services Office of Research Services NIH NIH Bethesda, MD 20892 Bethesda, MD 20892 U.S.A. U.S.A. Klaus Biemann John D. Goeschl Phytokinetics, Ltd. Department of Chemistry College Station, TX 77840 Massachusetts Institute of Technology Cambridge, MA 02139 U.S.A. U.S.A. R.J. Griesbach Florist and Nursery Crops Laboratory B.A. Bolton Development Quality Laboratory Horticultural Science Institute Agricultural Research Service USDA Western Regional Research Center Beltsville, MD 20705 Agricultural Research Service USDA U.S.A. Albany, CA 94710 U.S.A."

With one volume published each year, this series keeps scientists and students current with the latest developments and results in all areas of the plant sciences. This present volume includes insightful reviews covering genetics, cell biology, physiology, comparative morphology, systematics, ecology, and vegetation science.

Plastids are the sites of conversion of solar energy into the chemical energy usable to sustain life. They are also responsible for the production of the vast majority of the oxygen in the atmosphere. Through these activities they play a unique role in the biosphere, producing two critical products upon which life on Earth depends. It covers in 21 chapters nearly all actively investigated areas of plastid biology, from biosynthesis to function to their uses in biotechnology. The editors have compiled an extensive list of international experts from whom to solicit chapters. As is evident from the suggested Table of Contents, the book will start with a discussion of genetic material and its expression, followed by differentiation and development of different plastid types and internal organization. This is followed by an in depth look at biogenesis and assembly of plastid proteins and protein complexes and then by the important metabolic functions in plastids. The book will end with two chapters discussing the role of plastid biology in protein expression biotechnology and in hydrogen and biofuel production.

The proceedings of the NATO Advanced Research Workshop on title], held in Paris, France, May 1993, provide a comprehensive view of the present state of ascomycete systematics. Following an introductory section, are sections devoted to ascoma and thallus structure and ontogeny; conidiomata and mitos

This volume assembles protocols for chromosome engineering and genome editing in two recently developed approaches for manipulating chromosomal and genomic DNA in plants. The first approach is a "plant chromosome vector" system, which allows the introduction of desired genes or DNA into target sites on the chromosome vector, particularly by sequence-specific recombination. The second approach is "genome-editing," which makes it possible to introduce mutations into any of the genes of DNA that we wish to change. In addition, this book also covers other related techniques used to accelerate progress in plant chromosome and genome engineering. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Cutting-edge and thorough, Chromosome and Genomic Engineering in Plants: Methods and Protocols provides a comprehensive source of protocols and other necessary information to anyone interested in this field of study.

Weeds hold an enigmatic and sometimes-controversial place in agriculture, where they are generally reviled, grudgingly tolerated, and occasionally admired. In most cases, growers make considerable effort to reduce the negative economic impact of weeds because they compete with crops for resources and hinder field operations, thereby affecting crop productivity and quality, and ultimately the sustainability of agriculture. Weed control in production agriculture is commonly achieved through the integration of chemical, biological, and mechanical management methods. Chemicals (herbicides) usually inhibit the growth and establishment of weed plants by interfering with various physiological and biochemical pathways. Biological methods include crop competition, smother crops, rotation crops, and allelopathy, as well as specific insect predators and plant pathogens. Mechanical methods encompass an array of tools from short handled hoes to sophisticated video-guided robotic machines. Integrating these technologies, in order to relieve the negative impacts of weeds on crop production in a way that allows growers to optimize profits and preserve human health and the environment, is the science of weed management.

This book presents an evolutionary biogeographic analysis of the Mexican Transition Zone, which is situated in the overlap of the Nearctic and Neotropical regions. It includes a comprehensive review of previous track, cladistic and molecular biogeographic analyses and is illustrated with full color maps and vegetation photographs of the respective areas covered. Given its scope, the book will be of interest to students and researchers whose work involves systematic and biogeographic analyses of plant and animal taxa of the Mexican Transition Zone or other transition zones of the world, and to ecologists working in biodiversity conservation, who will be able to appreciate the evolutionary relevance of the Mexican Transition Zone for establishing conservation areas..