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Plant Aging

Author: Roberto Rodríguez

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 425

ISBN-13: 1468457608

For many, the terms aging, maturation and senescence are synonymous and used interchangeably, but they should not be. Whereas senescence represents an endogenously controlled degenerative programme leading to plant or organ death, genetiC aging encompasses a wide array of passive degenerative genetiC processes driven primarily by exogenous factors (Leopold, 1975). Aging is therefore considered a consequence of genetiC lesions that accumulate over time, but by themselves do not necessarily cause death. These lesions are probably made more severe by the increase in size and complexity in trees and their attendant physiology. Thus while the withering of flower petals following pollination can be considered senescence, the loss of viability of stored seeds more clearly represents aging (Norden, 1988). The very recent book "Senescence and Aging in Plants" does not discuss trees, the most dominant group of plants on the earth. Yet both angiospermic and gymnospermic trees also undergo the above phenomena but less is known about them. Do woody plants senesce or do they just age? What is phase change? Is this synonymous with maturation? While it is now becoming recognized that there is no programmed senescence in trees, senescence of their parts, even in gymnosperms (e. g. , needles of temperate conifers las t an average of 3. 5 years), is common; but aging is a readily acknowledged phenomenon. In theory, at least, in the absence of any programmed senescence trees should -live forever, but in practice they do not.

Senescence and Aging in Plants

Author: L.D. Nooden

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 555

ISBN-13: 0323145957

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Senescence and Aging in Plants reviews the state of knowledge in the processes involved in plant senescence and aging. The book begins by discussing the emergence of senescence as a concept; experimental analysis of senescence; and patterns of senescence. It then examines membrane deterioration during senescence; photosynthesis in relation to leaf senescence; senescence of detached plant organs; changing patterns of nucleic acid and protein synthesis during senescence; and degradative and associated assimilatory aspects of nitrogen removal. This is followed by chapters on aspects of ethylene that may impinge upon its role in promoting senescence of higher plants; the role of cytokinins in plant senescence; the promoters and retardants of senescence; and the role of calcium in plant senescence. The concept of whole plant senescence is discussed, which can be subdivided into patterns, correlative controls, cessation of vegetative growth, declining assimilatory processes, assimilate partitioning, and hormonal controls. The final chapters cover the deterioration of cellular membranes during the plant aging process and seed aging.

Plant Senescence

Author: William W. Thomson

Publisher:

Published: 1987

Total Pages: 278

ISBN-13:

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Aging nuclear power plants : managing plant life and decommissioning.

Author: United States. Congress. Office of Technology Assessment

Publisher: DIANE Publishing

Published: 1993

Total Pages: 189

ISBN-13: 1428920773

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Senescence Signalling and Control in Plants

Author: Maryam Sarwat

Publisher: Academic Press

Published: 2018-11-29

Total Pages: 322

ISBN-13: 0128131888

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Senescence Signalling and Control in Plants discusses the studies showing the importance of hormone action on developmental senescence. It shows the involvement of various signaling components (such as EIN2, LOX2) and transcription factors (such as oresara1 or ORE1) in controlling hormonal activity during senescence. Further, the involvement of various micro RNAs (miR164, miR319) in regulating leaf senescence are discussed. Through this book, the authors throw light on all the reverse and forward genetic approaches to reveal the role of various other phytohormones regulating plant senescence and the molecular mechanisms involved. Chapters on relevant topics are contributed by experts working in the area, making this a comprehensive treatise designed to provide an in-depth analysis on the subject matter. Throws light on the involvement of hormones (other than the well- known hormones cytokine and ethylene) in plant senescence Shows the underlying mechanisms on the hormonal actions during senescence Exhibits the involvement of microRNAs during this important plant developmental process

Dealing with Aging Process Facilities and Infrastructure

Author: CCPS (Center for Chemical Process Safety)

Publisher: John Wiley & Sons

Published: 2018-04-03

Total Pages: 208

ISBN-13: 1119430755

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Examines the concept of aging process facilities and infrastructure in high hazard industries and highlights options for dealing with the problem while addressing safety issues This book explores the many ways in which process facilities, equipment, and infrastructure might deteriorate upon continuous exposure to operating and climatic conditions. It covers the functional and physical failure modes for various categories of equipment and discusses the many warning signs of deterioration. Dealing with Aging Process Facilities and Infrastructure also explains how to deal with equipment that may not be safe to operate. The book describes a risk-based strategy in which plant leaders and supervisors can make more informed decisions on aging situations and then communicate them to upper management effectively. Additionally, it discusses the dismantling and safe removal of facilities that are approaching their intended lifecycle or have passed it altogether. Filled with numerous case studies featuring photographs to illustrate the positive and negative experiences of others who have dealt with aging facilities, Dealing with Aging Process Facilities and Infrastructure covers the causes of equipment failures due to aging and their consequences; plant management commitment and responsibility; inspection and maintenance practices for managing life cycle; specific aging asset integrity management practices; and more. Describes symptoms and causal mechanisms of aging in various categories of process equipment Presents key considerations for making informed risk-based decisions regarding the repair or replacement of aging process facilities and infrastructure Discusses practices for managing process facility and infrastructure life cycle Includes examples and case histories of failures related to aging Dealing with Aging Process Facilities and Infrastructure is an important book for industrial practitioners who are often faced with the challenge of managing process facilities and infrastructure as they approach the end of their useful lifecycle.

Antioxidant and Anti-aging Action of Plant Polyphenols

Author: Christophe Hano

Publisher: MDPI

Published: 2020-11-13

Total Pages: 180

ISBN-13: 303936507X

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Polyphenols are plant non-nutrient natural products, or plant secondary metabolites, found in fruits, vegetables and seeds that we consume daily. Their intakes from fruit, vegetables, seeds, and nuts are associated with lower risks of chronic and age-related degenerative diseases. Aging is a dynamic and complex biological process involving multiple actors and subject to a number of genetic and/or environmental influences. The famous free radical theory of aging proposed by Prof. Harman in 1956 states that free radicals lead to oxidative damage, causing cellular dysfunction and physiological decline, and are responsible for aging, with the appearance of degenerative diseases and eventually death. From this hypothesis, antioxidant molecules are capable of slowing down the aging process through the successful scavenging of radical oxygen and nitrogen species. Polyphenols have been shown to prolong the lifespan of different model species operating through a well-conserved antioxidant mechanism. This collection of research and review articles covers the most recent advances in the use of plant polyphenols, ranging from their biological properties and possible functions as medicines, the importance of traditional medicines as a source of inspiration, the rationalization of new uses of plant extracts which lead to applications in modern medicine, the status of modern green-chemistry extraction methods, to some reflections on future prospects.

Annual Plant Reviews, Senescence Processes in Plants

Author: Susheng Gan

Publisher: Wiley-Blackwell

Published: 2007-04-23

Total Pages: 0

ISBN-13: 9781405139847

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The scientific and economic significance of plant senescence means that much effort has been made to understand the processes involved and to devise means of manipulating them agriculturally. During the past few years there has been considerable progress in this regard, especially in the molecular, genetic and genomic aspects. Senescence has a tremendous impact on agriculture. For example, leaf senescence limits crop yield and biomass production, and contributes substantially to postharvest loss in vegetable and ornamental crops during transportation, storage and on shelves. In addition, proteins, antioxidants and other nutritional compounds are degraded during senescence. Senescing tissues also become more susceptible to pathogen infection, and some of the pathogens may produce toxins, rendering food unsafe. Mitotic senescence may also determine sizes of leaves, fruits and whole plants. This volume summarizes recent progresses in the physiology, biochemistry, cell biology, molecular biology, genomics, proteomics, and biotechnology of plant senescence. Beginning with a chapter on senescence-related terminology and our current knowledge of mitotic senescence in plants (a less well-studied area), the book focuses on post-mitotic senescence, and includes chapters addressing the senescence of leaves, flowers and fruits. Later chapters examine the development of various new biotechnologies for manipulating the senescence processes of fruit and leaves, some of which are approaching commercialization. The book is directed at researchers and professionals in plant molecular genetics, physiology and biochemistry.

Dietary Patterns and Whole Plant Foods in Aging and Disease

Author: Mark L. Dreher

Publisher: Humana Press

Published: 2018-02-13

Total Pages: 619

ISBN-13: 3319591800

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This text provides a comprehensive review of the latest research on the effects of dietary patterns and whole plant foods on general health, aging, and cardiometabolic disease risk from major prospective cohort studies and randomized controlled trials (RCTs) and their meta-analyses. The book extensively assesses, the effects of lifestyle, dietary patterns, and specific whole plant foods on the quality of aging; the impact of fiber-rich foods on colonic microbiotia and weight regulation, the effects of which influence the quality of aging; the effects of fiber-rich diets on the aging gastrointestinal tract; and the role of dietary patterns and specific whole plant foods on coronary heart disease, hypertension, chronic kidney disease, stroke and type 2 diabetes. Figures are extensively used to highlight findings and tables summarizing food composition dietary patterns and whole plant foods. Tables summarizing meta-analyses and representative cohort studies and RCTs provide state-of-the-art coverage of the important effect of dietary patterns and whole plant foods on aging and cardiometabolic diseases. Dietary Patterns and Whole Plant Foods in Aging and Disease will serve as a very useful, state -of -the-art resource for dietitians, physicians, nurses, food industry scientists, researchers, naturopathic doctors, educators and their students interested in the role of dietary patterns and specific whole plant foods on aging and disease. The probability of healthy aging and disease prevention is significantly improved by 70% when individuals and populations follow a healthy lifestyle. Healthy lifestyle choices include adhering to a healthy dietary pattern, increasing physical activity most days of the week, achieving and maintaining lean body weight and waist size, and the cessation of smoking. It is estimated that 90% or more of those in westernized populations are on track for unhealthy aging and increased cardiometabolic disease risk, especially with the obesity pandemic associated with relatively poor diet quality and sedentary lifestyles. Healthy dietary patterns significantly lower risk of all-cause mortality and chronic disease incidence compared to Western dietary patterns. Since healthy whole and minimally processed plant foods vary widely in their nutrient and phytochemical compositions, their overall benefit in aging and disease may vary depending on the specific whole plant foods consumed.

Plant Senescence

Author: Yongfeng Guo

Publisher: Humana Press

Published: 2018-02-02

Total Pages: 367

ISBN-13: 9781493976706

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This detailed volume covers a wide variety of techniques either developed specially for plant senescence studies or optimized for studying senescing plants. After an introduction to the topic, the book continues with sections on phenotypic analysis and molecular markers of plant organ senescence, hormonal control of plant senescence, stress-induced senescence, molecular and cellular processes in plant senescence, as well as systems biology approaches. Written for 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. Authoritative and practical, Plant Senescence: Methods and Protocols aims to provide a useful hand book of standard protocols for plant molecular biologists working on senescence.