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Senescence processes in plants / edited by Susheng Gan. — Oxford ;Ames, Iowa : Blackwell Publishing, c2007.—(58.8437/S475)

Contents

                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
    1.5 Role of telomere and telomerase in mitotic senescence
    1.6 Closing remarks
    2 Chlorophyll catabolism and leaf coloration
    2.1 Introduction
    2.2 Chlorophyll catabolites
    2.3 The chlorophyll degradation pathway
    2.4 Chlorophyll catabolic mutants
    2.5 Signifcance of chlorophyll breakdown
    2.6 The pigments of senescing leaves
    2.7 The function of anthocyanins in leaf senescence
    2.8 Conclusions and perspectives References
    3 Membrane dynamics and regulation of subceilular changes during senescence
    3.1 Introduction
    3.2 Loss of membrane structural integrity during senescence
    3.3 Role of proteolysis in membrane senescence
    3.4 Dismantling of membranes in senescing tissue
    3.5 Role of autophagy
    3.6 Metabolism of membrane fatty acids in senescing tissues
    3.7 Translational regulation of senescence
    4 Oxidative stress and leaf senescence
    4.1 Introduction
    4.2 Antioxidative capacity, oxidative stress and life span
    4.3 Antioxidants
    4.4 ROS signaling
    4.5 Role of different cell compartments
    4.6 Concluding remarks
    5 Nutrient remobilization during leaf senescence
    5.1 Overview
    5.2 Macro- and micronutrient remobilization
    5.3 Nitrogen remobilization
    5.4 Outlook
    6 Environmental regulation of leaf senescence
    6.1 Introduction
    6.2 Light irradiance
    6.3 Ozone
    6.4 Temperature
    6.5 Drought stress
    6.6 Flooding
    6.7 Salinity
    6.8 Environmental pollution - toxic materials
    6.9 Oxidative stress involvement in environmental regulation of senescence
    6.10 Nutrient/mineral shortage
    6.11 Atmospheric CO2
    6.12 Biotic stress
    6.13 Concluding remarks
    7 Developmental and hormonal control of leaf senescence
    7.1 Introduction
    7.2 Developmental senescence: a plant genome is optimised for early survival and reproduction
    7.3 Developmental processes that regulate leaf senescence
    7.4 Hormonal control of leaf senescence
    7.5 Involvement of genome programmes in the regulation of senescence-associated genes
    7.6 Integrating hormonal action into developmental senescence
    7.7 Outlook and perspectives
    8 The genetic control of senescence revealed by mapping quantitative trait loci
    8.1 Quantitative traits - what they are and how they are mapped
    8.2 Biomarkers of the senescence process
    8.3 Correlated developmental events as second-order senescence traits
    8.4 G x E and the contribution of biotic and abiotic factors
    8.5 Case studies
    8.6 Exploitation of QTL mapping for senescence traits
    8.7 QTL, senescence, ageing and death
    9 Genomics and proteomics of leaf senescence
    9.1 Introduction
    9.2 Transcriptomics of leaf senescence
    9.3 Proteomics of leaf senescence
    9.4 Conclusions
    10 Molecular regulation of leaf senescence
    10.1 Introduction
    10.2 Isolation and classification of SAGs
    10.3 Regulatory modes of SAGs
    10.4 Molecular regulatory mechanisms of leaf senescence
    10.5 Conclusions and future challenges
    11 Flower senescence
    11.1 Introduction
    11.2 Flower opening and senescence
    ll.3 Model systems
    11.4 Hormonal regulation of flower senescence
    11.5 Flower senescence and remobilization of resources
    11.6 Petal senescence as programmed cell death
    11.7 Molecular biology of petal senescence
    12 Fruit ripening and its manipulation
    12.1 Introduction
    12.2 Physiologies of ripening fruit
    12.3 Model ripening systems
    12.4 Ripening processes and their manipulation
    12.5 Summary
    13 Genetic manipulation of leaf senescence
    13.1 Introduction
    13.2 Strategies of manipulating leaf senescence
    13.3 IPT-based transgenic techniques for manipulation of cytokinin production
    13.4 Development of the SAG 12-1PT autoregulatory cytokinin production system
    13.5 Use of the SAG12-1PT to manipulate senescence in crops
    13.6 Other strategies for manipulation of leaf senescence
    13.7 Closing remarks
    Index