By Susheng Gan
The clinical and monetary value of plant senescence signifies that a lot attempt has been made to appreciate the procedures concerned and to plan technique of manipulating them agriculturally. prior to now few years there was substantial development during this regard, specially within the molecular, genetic and genomic elements. Senescence has a massive impression on agriculture. for instance, leaf senescence limits crop yield and biomass creation, and contributes considerably to postharvest loss in vegetable and decorative plants in the course of transportation, garage and on cabinets. moreover, proteins, antioxidants and different dietary compounds are degraded in the course of senescence. Senescing tissues additionally develop into extra vulnerable to pathogen an infection, and a few of the pathogens might produce pollutants, rendering nutrients damaging. Mitotic senescence can also be certain sizes of leaves, culmination and full crops.
This quantity summarizes fresh progresses within the body structure, biochemistry, telephone biology, molecular biology, genomics, proteomics, and biotechnology of plant senescence. starting with a bankruptcy on senescence-related terminology and our present wisdom of mitotic senescence in vegetation (a much less well-studied area), the booklet specializes in post-mitotic senescence, and contains chapters addressing the senescence of leaves, vegetation and culmination. Later chapters research the advance of varied new biotechnologies for manipulating the senescence techniques of fruit and leaves, a few of that are drawing close commercialization. The publication is directed at researchers and pros in plant molecular genetics, body structure and biochemistry.Content:
Chapter 1 Mitotic Senescence in crops (pages 1–11): Susheng Gan
Chapter 2 Chlorophyll Catabolism and Leaf color (pages 12–38): Stefan Hortensteiner and David W. Lee
Chapter three Membrane Dynamics and legislation of Subcellular adjustments in the course of Senescence (pages 39–68): Marianne Hopkins, Linda McNamara, Catherine Taylor, Tzann?Wei Wang and John Thompson
Chapter four Oxidative pressure and Leaf Senescence (pages 69–86): Ulrike Zentgraf
Chapter five Nutrient Remobilization in the course of Leaf Senescence (pages 87–107): Andreas M. Fischer
Chapter 6 Environmental law of Leaf Senescence (pages 108–144): Amnon Lers
Chapter 7 Developmental and Hormonal regulate of Leaf Senescence (pages 145–170): Jos H.M. Schippers, Hai?Chun Jing, Jacques Hille and Paul P. Dijkwel
Chapter eight The Genetic keep an eye on of Senescence published through Mapping Quantitative Trait Loci (pages 171–201): Helen Ougham, Ian Armstead, Catherine Howarth, Isaac Galyuon, Iain Donnison and Howard Thomas
Chapter nine Genomics and Proteomics of Leaf Senescence (pages 202–230): Marie?Jeanne Carp and Shimon Gepstein
Chapter 10 Molecular legislation of Leaf Senescence (pages 231–255): Hyo Jung Kim, Pyung okay Lim and Hong Gil Nam
Chapter eleven Flower Senescence (pages 256–277): Michael S. Reid and Jen?Chih Chen
Chapter 12 Fruit Ripening and its Manipulation (pages 278–303): James J. Giovannoni
Chapter thirteen Genetic Manipulation of Leaf Senescence (pages 304–322): Yongfeng Guo and Susheng Gan
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Extra info for Annual Plant Reviews Volume 26: Senescence Processes in Plants
Several hypotheses have been presented in the literature and will be discussed here. , 1988). Their importance for a chl degradation pathway that ultimately leads to the disappearance of green color has not been unequivocally established for all of them. 1), colorless derivatives of pyro forms or of 132 -hydroxylated forms of chl have so far escaped detection. 1 — — — — — — MCS PAO RCCR CBR CAR CLH Abbreviation Enzyme activity Enzyme activity AtCLH1: At1g19670 AtCLH2: At5g43860 Enzyme activity At3g44880 At4g37000 Activity Enzyme activity — — — Enzyme activity AtMRP2: At2g34660 AtMRP3: At3g13080 Identiﬁcation/gene locus in Arabidopsis Plastids Plastids, inner envelope Plastids, stroma Plastids, envelope Cytosol?
W. Lee, unpublished observations). In the large majority of red-senescing species, the principal (and often the only) anthocyanin produced is cyanidin-3-glucoside. , 1992), but it is clear that the anthocyanins accumulated during leaf senescence are a small portion of those present in ﬂowers and fruits. This anthocyanin has a peak absorbance of 525–530 nm, broadened considerably in vivo because of the scattering of light within the mesophyll of the leaf. After a century or so of speculation about the potential physiological and ecological functions of anthocyanins in vegetative tissues, considerable progress has been made in the past decade.
Coli in order to elucidate their role by functional screening. g. , 2004), and may also be helpful to elucidate the glucosyltransferase(s) that is responsible for the formation of glycosylated NCCs in Arabidopsis. 3 Malonylation The predominant NCCs from canola and Nicotiana rustica, Bn-NCC-1 and NrNCC-1, respectively, are malonylated. , 2004) and in vitro have been shown to act on NCCs. As judged from the cytosolic localization of the canola transferase (H¨ortensteiner, 1998), and because FCC to NCC conversion occurs after import into the vacuole (see below), it can be assumed that FCCs are the natural substrates for transfer of the malonyl moiety.