Senescence processes in plants [[electronic resource] /] / edited by Susheng Gan

• Pubblicazione: Oxford ; ; Ames, Iowa, : Blackwell Pub., 2007
• Descrizione fisica: 1 online resource (354 p.)
• Disciplina: 571.8782; 580.5
• Soggetto topico: Plants - Aging
• Classificazione: 42.42
• Altri autori: GanSusheng
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Senescence Processes in Plants; Contents; Contributors; Preface; 1 Mitotic senescence in plants; 1.1 Introduction; 1.2 Terminology and types of senescence; 1.3 Plants exhibit mitotic senescence, postmitotic senescence and cell quiescence; 1.4 Mitotic senescence: arrest of SAM; 1.4.1 Initiation of SAM; 1.4.2 Maintenance of SAM; 1.4.3 Arrest of SAM: a mitotic senescence in nature; 1.4.3.1 Physiological regulation; 1.4.3.2 Genetic regulation; 1.5 Role of telomere and telomerase in mitotic senescence; 1.5.1 Telomere; 1.5.2 Telomerase ; 1.5.3 Telomere shortening and replicative senescence in animals1.5.4 Telomere biology in plants; 1.6 Closing remarks; Acknowledgment; References; 2 Chlorophyll catabolism and leaf coloration; 2.1 Introduction; 2.2 Chlorophyll catabolites; 2.2.1 Green catabolites; 2.2.1.1 Chlorins; 2.2.1.2 Phytol; 2.2.2 Catabolites with a tetrapyrrolic structure; 2.2.2.1 Red chlorophyll catabolites; 2.2.2.2 Fluorescent chlorophyll catabolites; 2.2.2.3 Nonfluorescent chlorophyll catabolites; 2.2.2.4 Are NCCs degraded further?; 2.3 The chlorophyll degradation pathway; 2.3.1 Chlorophyll cycle ; 2.3.2 Reactions on green pigments2.3.2.1 Chlorophyllase; 2.3.2.2 Mg dechelation; 2.3.3 Loss of green color; 2.3.3.1 Pheophorbide a oxygenase; 2.3.3.2 Red chlorophyll catabolite reductase; 2.3.4 Reactions on pFCC; 2.3.4.1 Hydroxylation; 2.3.4.2 Glucosylation; 2.3.4.3 Malonylation; 2.3.4.4 Demethylation; 2.3.4.5 Tautomerization; 2.4 Chlorophyll catabolic mutants; 2.5 Significance of chlorophyll breakdown; 2.5.1 Topology of chlorophyll breakdown; 2.5.2 Chl breakdown and cell death; 2.5.3 Chl breakdown and nitrogen economy; 2.6 The pigments of senescing leaves ; 2.7 The function of anthocyanins in leaf senescence2.7.1 Physiological explanations; 2.7.2 Ecological explanations; 2.7.3 Reconciling these explanations; 2.8 Conclusions and perspectives; References; 3 Membrane dynamics and regulation of subcellular changes during senescence; 3.1 Introduction; 3.2 Loss of membrane structural integrity during senescence; 3.2.1 Senescence-associated changes in the molecular organization of membrane lipid bilayers; 3.2.2 Role of lipases; 3.2.2.1 Initial fate of de-esterified fatty acids in senescing membranes ; 3.2.2.2 Autocatalytic nature of membrane fatty acid de-esterification3.2.3 Role of galactolipases; 3.3 Role of proteolysis in membrane senescence; 3.4 Dismantling of membranes in senescing tissue; 3.4.1 Plastoglobuli; 3.4.2 Cytosolic lipid-protein particles; 3.4.2.1 Sites of cytosolic lipid-protein particle ontogeny; 3.5 Role of autophagy; 3.6 Metabolism of membrane fatty acids in senescing tissues; 3.6.1 Galactolipid fatty acids; 3.6.2 Fate of thylakoid fatty acids during stress-induced senescence; 3.7 Translational regulation of senescence; References; 4 Oxidative stress and leaf senescence ; 4.1 Introduction
• Sommario/riassunto: 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, prote
• Titolo autorizzato: Senescence processes in plants
• ISBN: 1-281-32028-5; 9786611320287; 0-470-76408-2; 0-470-98885-1; 0-470-99426-6
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9910830051003321
• Lo trovi qui: Univ. Federico II
• Serie: Annual plant reviews ; ; v. 26.