Decoding Insect Feeding


Book Description

Nicotiana attenuata has the capacity to respond specifically to herbivory by its natural herbivore, Manduca sexta, through the perception of elicitors in larval oral secretions (OS). Fatty acid-amino acid conjugates (FACs) in the OS of the M. sexta larvae elicit the herbivory-specific responses in N.attenuata, an annual wild tobacco species. How FACs are perceived and activate signal transduction mechanisms is unknown. To find transcriptional targets of the FAC signal transduction pathway with the goal of identifying regulatory components of insect mediated responses, I used the SuperSAGE technique. I generated two SuperSAGE libraries from FAC-elicited and wounded leaf for the identification of transcripts rapidly and differentially regulated by FACs. From 12,744 unique transcript sequences identified, 429 and 117 were significantly up- and down-regulated, respectively, after FAC elicitation compared to wounding. Based on gene ontology classification, 25% of the annotated Unitags corresponded to regulatory components. qPCR analysis confirmed the FAC regulation of 70% of a subset of 27 UniTags selected. ...




Regulatory Mechanisms in Insect Feeding


Book Description

The only book to deal comprehensively with insect feeding was published by C. T. Brues in 1946. His Insect Dietary was an account of insect feeding habits. Since that time there has been a revolution in biology, and almost all aspects of our understanding of insect feeding have expanded to an extent and into areas that would have been unthinkable in Brues' day. Yet, our book does not replace Insect Dietary but, instead, complements it, because our aim is to bring together information on the mechanisms by which food quality and quantity are regulated. We deliberately focus attention on the feeding process; to include food-finding would have required a much larger book and would have moved the focus away from more proximate mechanisms. This book is dedicated to the late Vincent G. Dethier. As a pioneer in studying the physiological basis of animal behavior, he focused on regulation of feeding in flies and caterpillars. His work on the blowfly, together with that by his many students and co-workers, still provides the most completely described mechanism of insect feeding. The citation of his work in almost every chapter in this book illustrates the importance of his findings and ideas to our current understanding of regulation of insect feeding. The authors in this book provide many innovative and stimulating ideas typifying Dethier's approach to the study of feeding be havior.







Plant-Provided Food for Carnivorous Insects


Book Description

This book, first published in 2005, addresses food-mediated interactions, focusing on how plants employ foods to recruit arthropod 'bodyguards' as a protection against herbivores.




Agricultural Research


Book Description




The Mechanosensory Lateral Line


Book Description

This volume represents the published proceedings of an international conference on the Neurobiology and Evolution of the Mechanosensory Lateral Line System held August 31 to September 4, 1987, at the Center for Interdisciplinary Research at the University of Bielefeld, West Germany. The goal of this confer ence was to bring together researchers from all over the world to share informa tion about a major aquatic sensory system, the evolution and function of which have largely remained an enigma since the 18th century. The "lateral line" or "lateralis" system has been used as an umbrella term to describe what originally (without the aid of modern anatomical techniques) looked like a series of pits, grooves, and lines on the head and trunk of fishes and some amphibians. For at least the past 30 years, however, it has been recognized that the lateralis system comprises not one, but at least two functional classes of receptors: mechanoreceptors and electroreceptors. The relative ease with which the appropriate stimulus could be defined and measured for the electroreceptive class has resulted in an explosion of information on this submodality during the past 20 years. As a result, there is little ambiguity about the overall function of the electrosensory system, now generally regarded as an independent system in its own right. A similarly clear definition for the function of the mechanosensory lateralis system has not been as forthcoming.




Biotechnology Unzipped


Book Description

In this update to the very popular first edition of the same name, skilled science popularizer Eric Grace helps readers understand what biotechnology is and what implications it holds for all of us. Following on the heels of the success of the first edition, this thoroughly updated version offers an in-depth and accessible review of the basics of biotechnology. Accomplished science communicator Eric Grace focuses on the ethical implications involved, the wide range of public opinions both at home and abroad, the role of the media in communicating a complicated science topic, and the formidable problems associated with patenting life itself. With an emphasis on medicine, agriculture, and the environment, Grace explores the promises and realities of biotechnology. He deals frankly with the fact that biotechnology is first and foremost a commercial activity, often driven by big business and directed by the bottom line. And as biotechnology is used more frequently in medical diagnosis and treatment, we are witness to significant setbacks and reversals, dimming hopes that were prevalent when the first edition was released. But we are also witness to the burgeoning use of the technology in forensic science where DNA analysis has become commonplace in solving crimes. Likewise, DNA analysis has been a boon to studies of human history and evolution, revealing ancient details originally thought lost to us. At the same time, new uses for genetically altered bacteria are being discovered that help us clean up the environment by breaking down or sequestering toxic chemicals. While the public remains concerned about biotechnology, there is increasing awareness of the potential benefits. This updated edition of Biotechnology Unzipped helps put the many issues in perspective and provides answers to the most important questions.







Neurobiology of Chemical Communication


Book Description

Intraspecific communication involves the activation of chemoreceptors and subsequent activation of different central areas that coordinate the responses of the entire organism—ranging from behavioral modification to modulation of hormones release. Animals emit intraspecific chemical signals, often referred to as pheromones, to advertise their presence to members of the same species and to regulate interactions aimed at establishing and regulating social and reproductive bonds. In the last two decades, scientists have developed a greater understanding of the neural processing of these chemical signals. Neurobiology of Chemical Communication explores the role of the chemical senses in mediating intraspecific communication. Providing an up-to-date outline of the most recent advances in the field, it presents data from laboratory and wild species, ranging from invertebrates to vertebrates, from insects to humans. The book examines the structure, anatomy, electrophysiology, and molecular biology of pheromones. It discusses how chemical signals work on different mammalian and non-mammalian species and includes chapters on insects, Drosophila, honey bees, amphibians, mice, tigers, and cattle. It also explores the controversial topic of human pheromones. An essential reference for students and researchers in the field of pheromones, this is also an ideal resource for those working on behavioral phenotyping of animal models and persons interested in the biology/ecology of wild and domestic species.




Experimental Analysis of Insect Behaviour


Book Description

This volume has come about as a direct result of a Symposium entitled "Experimental Analysis of Insect Behaviour" which was an important con tribution to the 14 International Congress of Entomology held in Canberra, Australia, in August 1972 under the joint sponsorship of the Australian Academy of Science and the Australian Entomological Society. It is not, however, strictly Symposium proceedings. I have included, in this volume contributions from several workers who had to withdraw from the Symposium at a fairly late stage. Furthermore, quite intentionally, a number of the contributions bear only a general relationship to the papers given at the Congress. To permit this; the deadline for contribu tions was set at some six months after the Symposium. I imposed no restrictions on the form of the contributions. I did, however, indicate that speculative reviews highlighting the author's own recent research or that of his immediate colleagues would be particularly acceptable, and a number of the contributors have taken the opportunity to write this kind of paper. Several contributors, notably those whose task it was to give more general papers in the Symposium itself, have written reviews of somewhat greater scope.