Download or read book The Role of Secondary Compounds in Plant Interactions allelopathy written by and published by . This book was released on 1977 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Research Planning Conference on the Role of Secondary Compounds in Plant Interactions Allelopathy written by C. G. MacWhorter and published by . This book was released on 1977 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Allelopathy written by Manuel J. Reigosa and published by Springer Science & Business Media. This book was released on 2006-02-28 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are many good books in the market dealing with the subject of allelopathy. When we designed the outline of this new book, we thought that it should include as many different points of view as possible, although in an integrated general scheme. Allelopathy can be viewed from different of perspectives, ranging from the molecular to the ecosystem level, and including molecular biology, plant biochemistry, plant physiology, plant ecophysiology and ecology, with information coming also from the organic chemistry, soil sciences, microbiology and many other scientific disciplines. This book was designed to include a complete perspective of allelopathic process. The book is divided into seven major sections. The first chapter explores the international development of allelopathy as a science and next section deals with methodological aspects and it explores potential limitations of actual research. Third section is devoted to physiological aspects of allelopathy. Different specialists wrote about photosynthesis, cell cycle, detoxification processes, abiotic and biotic stress, plant secondary metabolites and respiration related to allelopathy. Chapters 13 through 16 are collectively devoted to various aspects of plant ecophysiology on a variety of levels: microorganisms, soil system and weed germination. Fundamental ecology approaches using both experimental observations and theoretical analysis of allelopathy are described in chapters 16 and 17. Those chapters deal with the possible evolutionary forces that have shaped particular strategies. In the section named “allelopathy in different environments”, authors primarily center on marine, aquatic, forest and agro ecosystems. Last section includes chapters addressing application of the knowledge of allelopathy.
Download or read book Allelopathy written by Francisco A. Macias and published by CRC Press. This book was released on 2003-09-25 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most, if not all, books on allelopathy cover the ecological, agronomic, and descriptive physiological aspects. And although the amount of papers published on the chemical aspects and mode of action of these compounds continues to rise, there has been, until now, no book available that reflects the latest literature. Written by experts, Allelopathy:
Download or read book Chemical Ecology of Plants Allelopathy in Aquatic and Terrestrial Ecosystems written by Inderjit and published by Birkhäuser. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Allelochemicals play a great role in managed and natural ecosystems. Apart from plant growth, allelochemicals also may influence nutrient dynamics, mycorrhizae, soil chemical characteristics, and microbial ecology. Synergistic action of various factors may better explain plant growth and distribution in natural systems. The book emphasizes the role of allelochemicals in shaping the structure of plant communities in a broader ecological perspective. The book addresses the following questions: (1) How do allelochemicals influence different components of the ecosystem in terms of shaping community structure? (2) Why is it difficult to demonstrate interference by allelochemicals (i.e., allelopathy) in a natural system in its entirety? Despite a large amount of existing literature on allelopathy, why are ecologists still skeptical about the existence of allelopathy in nature? (3) Why are there only scarce data on aquatic ecosystems? (4) What role do allelochemicals play in microbial ecology?.....
Download or read book Plant Microbe Interactions written by B.B. Biswas and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have seen tremendous progress in unraveling the molecular basis of different plant-microbe interactions. Knowledge has accumulated on the mecha nisms of the microbial infection of plants, which can lead to either disease or resistance. The mechanisms developed by plants to interact with microbes, whether viruses, bacteria, or fungi, involve events that can lead to symbiotic association or to disease or tumor formation. Cell death caused by pathogen infection has been of great interest for many years because of its association with plant resistance. There appear to be two types of plant cell death associated with pathogen infection, a rapid hypersensitive cell death localized at the site of infection during an incompatible interaction between a resistant plant and an avirulent pathogen, and a slow, normosensitive plant cell death that spreads beyond the site of infection during some compatible interactions involving a susceptible plant and a virulent, necrogenic pathogen. Plants possess a number of defense mechanisms against infection, such as (i) production of phytoalexin, (ii) formation of hydrolases, (iii) accumulation of hydroxyproline-rich glycoprotein and lignin deposition, (iv) production of pathogen-related proteins, (v) produc tion of oligosaccharides, jasmonic acid, and various other phenolic substances, and (vi) production of toxin-metabolizing enzymes. Based on these observations, insertion of a single suitable gene in a particular plant has yielded promising results in imparting resistance against specific infection or disease. It appears that a signal received after microbe infection triggers different signal transduction pathways.
Download or read book Chemically Mediated Interactions between Plants and Other Organisms written by Gillian A. Cooper-Driver and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical warfare between plants and their herbivores and pathogens was first brought to our attention by the publication 25 years ago of the paper by Fraenkel in Science. There, he pointed out that most plants have similar nutritional characteristics so that the selection of plants by insect herbivores must depend on the relative toxicity of secondary compounds. This led, rather gradually, to a host of papers on plant-herbivore interactions. More or less at the same time, insect physiologists and ecologists were starting to realise the importance of chemical communi cation systems in determining sexual and other characteristics of insect behaviour. Nine years ago the Phytochemical Society of North America published their Symposium on 'Biochemical Interaction Between Plants and Insects' in which the plant apparency theory was expounded by both Paul Feeny and Rex Cates and David Rhoades. This stated that plants which are apparent usually contain secondary components which reduce digestibility (tannins and lignins) while ephemeral plants have more toxic, and perhaps less costly, compounds such as alkaloids. These papers stimulated much research on biochemical ecology. The recognition of the importance of the biochemical factors in such interactions is not just of scientific interest. It is vitally important in programs for the production of new varieties of cultivated plants, especially in tropical countries where about one-third or more of the crops are lost to predation or disease.
Download or read book Allelopathy in Sustainable Agriculture and Forestry written by Ren Sen Zeng and published by Springer Science & Business Media. This book was released on 2008-04-03 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first comprehensive and up-to-date reference on the science, mechanism, methodology, and application of allelopathy. The objective of this practical reference is to report on the latest advances by inviting leading scientists to contribute in specific fields. The volume is organized under three major subsections: History of allelopathy, Allelochemicals, allelopathic mechanisms, and bioassays, and Application of allelopathy in agriculture and forestry.
Download or read book Principles and Practices in Plant Ecology written by Inderjit and published by CRC Press. This book was released on 2023-07-21 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles and Practices in Plant Ecology: Allelochemical Interactions provides insights and details recent progress about allelochemical research from the ecosystem standpoint. Research on chemical ecology of allelochemicals in the last three decades has established this field as a mature science that interrelates the research of biologists, weed and crop scientists, agronomists, natural product chemists, microbiologists, ecologists, soil scientists, and plant physiologists and pathologists. This book demonstrates how the influence of allelochemicals on the various components of an ecosystem-including soil microbial ecology, soil nutrients, and physical, chemical, and biological soil factors-may affect growth, distribution, and survival of plant species. Internationally renowned exper†s discuss how a better understanding of allelochemical phenomena can lead to true sustainable agriculture.
Download or read book The History of Allelopathy written by R.J. Willis and published by Springer Science & Business Media. This book was released on 2007-10-12 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a claim to be the first work to document in detail the history of allelopathy, Willis’s text provides an account of the concept of allelopathy as it has occurred through the course of botanical literature from the earliest recorded writings to the modern era. A great deal of information is presented here in a consolidated and accessible form for the first time. The book offers a unique insight into the historical factors which have influenced the popularity of allelopathy.
Download or read book Allelopathy written by Inderjit and published by . This book was released on 1995 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses a variety of chemical interactions among plants, including algae, fungi, bacteria, and higher plants. Includes chapters on allelopathic interactions involving specific organisms and some of the chemicals isolated during these interactions. Covers mechanisms of action of chemicals involved in allelopathy. Includes a section on biological control and direct conversion of compounds for use in agriculture. Illustrates how a better understanding of the allelopathic phenomenon can lead to progress toward more sustainable agricultural systems.
Download or read book Allelopathy written by Zahid A. Cheema and published by Springer Science & Business Media. This book was released on 2012-09-18 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Allelopathy is an ecological phenomenon by which plants release organic chemicals (allelochemicals) into the environment influencing the growth and survival of other organisms. In this book, leading scientists in the field synthesize latest developments in allelopathy research with a special emphasis on its application in sustainable agriculture. The following topics are highlighted: Ecological implications, such as the role of allelopathy during the invasion of alien plant species; regional experiences with the application of allelopathy in agricultural systems and pest management; the use of microscopy for modeling allelopathy; allelopathy and abiotic stress tolerance; host allelopathy and arbuscular mycorrhizal fungi; allelopathic interaction with plant nutrition; and the molecular mechanisms of allelopathy. This book is an invaluable source of information for scientists, teachers and advanced students in the fields of plant physiology, agriculture, ecology, environmental sciences, and molecular biology.
Download or read book Effects of Edaphic and Multi compound Interactions in Allelopathy written by Nishanth Tharayil-Santhakumar and published by . This book was released on 2008 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Allelopathy, secondary metabolite-mediated plant-to-plant interaction, is gaining application in current agricultural science as well as in invasion ecology. The present study addresses the major knowledge gaps in this field by investigating (i) how the bioavailability of allelochemicals is altered when they are present in a mixture in the soil matrix and (ii) what are the cues and consequences of allelochemical production in nutrient acquisition by the plant. The role of preferential sorption to soil in altering the chemical composition of plant exudates was studied in a silt loam soil using representative mixtures of plant phenolic acids, namely, hydroxybenzoic acid, vanillic acid, coumaric acid, and ferulic acid. The concentration-dependent sorption coefficient (Kd) of hydroxybenzoic acid was decreased more by than 90% in the presence of coumaric acid. About 95% of sorbed vanillic acid was displaced into the soil solution in the presence of ferulic acid. Soil organic matter was associated with preferential sorption. The results demonstrate that preferential sorption of phenolic acids to soil can alter the availability of plant exudates in mixtures and thus may mediate their phytotoxic effects. To understand the dynamics of allelochemical mixture in soil matrix, using Centaurea maculosa Lam.as a model source, we investigated how the bioavailability of complex allelochemical mixtures is modified in a soil-microbial system. C. maculosa litter decomposition experiment revealed the existence of allelochemical in complex mixture in soil matrix. We observed the prolonged persistence of allelochemicals in soil matrix when present in complex mixtures. Also, allelochemicals exhibited dynamic nature undergoing simultaneous degradation as well as synthesis. We investigated allelopathy as a corollary effect of resource acquisition mechanism using Centaurea. diffusa Lam. as a model system. The exudation of 8-hydroxyquinoline (8HQ) by C. diffusa was not correlated with any of the tested nutrient stresses; however the 8HQ production remained steady under prolonged Fe stress, indicating this as a specific plant response to Fe stress. 8HQ showed high specificity in extracting Fe from both invaded and non-invaded soils. C. diffusa was able to uptake Fe from Fe(OH)3, but addition of carbon resulted in Fe deficiency, indicating a direct role of 8HQ in Fe uptake by this plant. Related (C. maculosa, C. solistitialis) as well as non related species (Zea mays) of C. diffusa were able to uptake Fe from Fe-hydroxyquinoline complex (FeQ). Combining the above with the root reductase activity of the species, we propose that FeQ because of its hydrophobic nature, could passively diffuse across plasma membrane. In bioassay studies the addition of Fe decreases the toxicity of 8HQ, suggesting the phytotoxic action of 8HQ is via chelation of cellular Fe. In conclusion, the present study revealed the competitive sorption phenomenon of plant secondary metabolites in soil matrix, as well as their dynamic nature. Combining the results from these studies that, 8HQ not only mobilizes the nutrients from soil, but also these nutrient complexes can be taken up by plants, we report an additional role of 8HQ in increasing the competitive ability of this weed - by facilitating the resource acquisition. Also, we report for the first time, the possible existence of a phytosiderophore-like mechanism for Fe acquisition in non-graminaceous species.
Download or read book Co Evolution of Secondary Metabolites written by Jean-Michel Mérillon and published by Springer. This book was released on 2020-02-24 with total page 973 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Reference Work is devoted to plant secondary metabolites and their evolutionary adaptation to different hosts and pests. Secondary metabolites play an important biological role in plants’ defence against herbivores, abiotic stresses and pathogens, and they also attract beneficial organisms such as pollinators. In this work, readers will find a comprehensive review of the phytochemical diversity, modification and adaptation of secondary metabolites, and the consequences of their co-evolution with plant parasites, pollinators, and herbivores. Chapters from expert contributors are organised into twelve sections that collate the current knowledge in intra-/inter-specific diversity in plant secondary metabolites, changes in secondary metabolites during plants’ adaptation to different environmental conditions, and co-evolution of host-parasite metabolites. Among the twelve themed parts, readers will also discover expert analysis on the genetics and chemical ecology evolution of secondary metabolites, and particular attention is also given to allelochemicals, bioactive molecules in plant defence and the evolution of sensory perception in vertebrates. This reference work will appeal to students, researchers and professionals interested in the field of plant pathology, plant breeding, biotechnology, agriculture and phytochemistry.
Download or read book Allelopathy written by S.J. Rizvi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science is essentially a descriptive and experimental device. It observes nature, constructs hypotheses, plans experiments and proposes theories. The theory is never contemplated as the 'final truth', but remains ever subject to modifications, changes and rejections. The science of allelopathy in a similar way has emerged, and exists on a similar footing; our endeavour should be to keep it fresh and innovative with addition of newer in formation and concepts with the rejection of older ideas and antiquated techniques. During the past few decades encouraging results have been obtained in various aspects of allelopathic researches. However, in addition to continuing efforts in all these directions, constant attempts are to be made to describe the mechanics of allelopathic activity in molecular terms and to discover ways and means to exploit it for the welfare of mankind. We feel that multidisciplinary efforts are the only tool to achieve this goal. It is the hope of the editors that this book will serve as a document which identifies an integrated approach, through which research both to understand and exploit allelopathy can be conducted. The present volume arose out of an attempt to bring together eminent scientists in allelopathy to describe their work, of a highly diverse nature, under one title.
Download or read book The Mutual Interaction of Higher Plants Allelopathy written by R.J. Willis and published by Scientific Publishers. This book was released on 2008-09-01 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Die gegenseitige Beeinflussung der höherer Pflanzen – Allelopathie” by Gerhard Grümmer appeared in 1955. It was a remarkable and unique summary of a science, that had received little attention, but which was to captivate the attention of plant ecologists decades later. While Hans Molisch was credited for coining “allelopathy” (in German) in 1937, his monograph dealt primarily with the effects of ethylene. It was Gerhard Grümmer, a young academic at Ernst-Moritz-Arndt University, Greifswald, who marshalled the existing world literature on the chemical interactions of plants into the world's first coherent textbook on allelopathy. Grümmer, however, worked in East Germany, at a time when the “iron curtain” was descending, and his book on allelopathy remained little known outside Germany. In 1957, the book was translated into Russian, which helped advance subsequent allelopathic studies in the U.S.S.R. In the English-speaking world, the first comprehensive mono-graph on allelopathy is considered to be “Allelopathy” by E.L. Rice, published in 1974, and revised in 1984. While Molisch's heralded book has been both reprinted, and translated into English, Grümmer's meritorious volume has been sadly overlooked, and to this day still provides important insights into many allelopathic problems, in particular root excretions, pollen allelopathy, and chemical interactions in mistletoes. For these reasons, an English trans-lation of “Die gegenseitige Beeinflussung der höherer Pflanzen – Allelopathie” is long overdue, and it is hoped that its publication will assist ecologists in their research and consolidate Grümmer's position as a founding figure in the development of allelopathy as a science.
Download or read book Plant Plant Allelopathic Interactions written by Udo Blum and published by Springer Science & Business Media. This book was released on 2011-02-18 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to implement conservation measures farmers have used a variety of production methods, including the use of reduced or zero tillage and cover crops. One benefit of these production methods has been early season weed control. The literature suggests that a variety of mechanisms may be involved, among them the allelopathic effects of phenolic acids. This retrospective analysis addresses the following: How likely are phenolic acid concentrations and environmental conditions in wheat no-till cropping systems for the inhibition of annual broadleaf weed emergence? and Do phenolic acids have a dominant role or are they just one component of a larger promoter/modifier/inhibitor complex? The book covers allelopathic plant-plant interactions, laboratory and field experiments, and future research. It uses a journal format, provides justifications for procedures used, if-then hypotheses, and cons and pros so that readers can reach their own conclusions.
