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  • 1
    Online Resource
    Online Resource
    Milton :Taylor & Francis Group,
    Keywords: Flowers-Morphogenesis-Molecular aspects. ; Electronic books.
    Description / Table of Contents: Plants produce volatile compounds for communication within the environment. They play essential roles in pollinator and seed-disperser attraction, defense against pathogens, signaling, and stress response. With contributions from distinguished leading scientists in the field, this book provides up-to-date accomplishments in floral scent research.
    Type of Medium: Online Resource
    Pages: 1 online resource (429 pages)
    Edition: 2nd ed.
    ISBN: 9780429849251
    DDC: 575.6
    Language: English
    Note: Cover -- Half Title -- Title Page -- Copyright Page -- Table of Contents -- Preface -- Editors -- Contributors -- SECTION I: Chemistry of Plant Volatiles -- Chapter 1: Practical Approaches to Plant Volatile Collection and Analysis -- Chapter 2: Analysis of Internal Pools of Plant Volatiles -- Chapter 3: Bioassay-Guided Semiochemical Discovery in Volatile-Mediated Specialized Plant-Pollinator Interactions with a Practical Guide to Fast-Track Progress -- Chapter 4: The Chemical Diversity of Floral Scent -- Chapter 5: Vegetative and Fruit Volatiles for Human Consumption -- SECTION II: Biochemistry, Molecular Biology, and Evolution of Plant Volatiles -- Chapter 6: The Role of Transcriptome Analysis in Shaping the Discovery of Plant Volatile Genes: Past, Present, and Future -- Chapter 7: Flux Distribution Dynamics at the Interface of Central Carbon Metabolism and Terpenoid Volatile Formation -- Chapter 8: Floral Scent Metabolic Pathways and Their Regulation -- Chapter 9: Biosynthesis and Regulation of Vegetative Plant Volatiles -- Chapter 10: Biosynthesis and Regulation of Fruit Volatiles -- Chapter 11: Biosynthesis and Regulation of Belowground Signaling Molecules -- Chapter 12: Evolution of Scent Genes -- Chapter 13: Volatiles in Glands -- Chapter 14: Emission and Perception of Plant Volatiles -- SECTION III: Volatiles in Plant-Plant, Plant-Insect and Plant-Microbial Interactions -- Chapter 15: Floral Volatiles for Pollinator Attraction and Speciation in Sexually Deceptive Orchids -- Chapter 16: Behavioral Responses to Floral Scent: Experimental Manipulations and Multimodal Plant-Pollinator Communication -- Chapter 17: Herbivore-Induced Plant Volatiles as a Source of Information in Plant-Insect Networks -- Chapter 18: Belowground Plant Volatiles: Plant-Plant, Plant-Herbivore and Plant-Microbial Interactions. , Chapter 19: Tree Volatiles: Effects of Biotic and Abiotic Factors on Emission and Biological Roles -- SECTION IV: Genetic Improvements of Plant Volatiles -- Chapter 20: Metabolic Engineering of Plant Volatiles: Floral Scent, Flavors, Defense -- Index.
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  • 2
    ISSN: 1442-1984
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The monoterpene alcohol, linalool, is present in the floral fragrance of diverse plant families and is attractive to a broad spectrum of pollinators, herbivores and parasitoids. Floral emission of linalool has evolved de novo in the fragrant, moth-pollinated annual Clarkia breweri (Gray) Greene (Onagraceae) through a combination of up-regulation and ectopic expression of its biosynthetic enzyme, linalool synthase (LIS), in conjunction with allometric size increases in all floral organs. Linalool synthase activity and linalool emissions are 1000-fold lower in a sibling species, C. concinna (Fischer & Meyer) Greene, that is diurnally pollinated. Linalool synthase expression is spatially and temporally regulated during C. breweri flower development, immediately precedes free linalool emission and is absent from nonfloral tissues. Its activity is highest in the style, but most of the linalool product appears to be converted to the pyranoid and furanoid linalool oxides. The LIS structural gene is a member of the terpene synthase gene family, sharing sequence identity with two discrete classes, represented by limonene synthase (LMS) and copalyl pyrophosphate synthase (CPS). Genetic crosses between C. breweri and C. concinna indicate that strong linalool emission segregates as a dominant mendelian trait, whereas the inheritance of linalool oxide formation is more complex, suggesting epistatic biosynthetic pathway interactions. We discuss areas for future research, including comparative studies of linalool biosynthesis in different plant families, entrainment of linalool emission to nocturnal circadian rhythms and the induction of vegetative linalool as an indirect herbivore defense.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The ‘stay-green’ mutation cytG in soybean (Glycine max) partially inhibits the degradation of the light-harvesting complex II (LHCII) and the associated chlorophyll during monocarpic senescence. cytG did not alter the breakdown of the cytochrome b6/f complex, thylakoid ATP synthase or components of Photosystem I. In contrast, cytG accelerated the loss of oxygen evolution activity and PSII reaction-centre proteins. These data suggest that LHCII and other thylakoid components are degraded by separate pathways. In leaves induced to senesce by darkness, cytG inhibited the breakdown of LHCII and chlorophyll, but it did not enhance the loss of PSII-core components, indicating that the accelerated degradation of PSII reaction centre proteins in cytG was light dependent. Illumination of mature and senescent leaves of wild-type soybean in the presence of an inhibitor (lincomycin) of chloroplast protein synthesis revealed that senescence per se did not affect the rate of photoinhibition in leaves. Likewise, mature leaves of the cytG mutant did not show more photoinhibition than wild-type leaves. However, in senescent cytG leaves, photoinhibition proceeded more rapidly than in the wild-type. We conclude that the cytG mutation enhances photoinhibition in senescing leaves, and photoinhibition causes the rapid loss of PSII reaction-centre proteins during senescence in cytG.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-5028
    Keywords: gene duplication ; photosynthesis ; RFLP ; Southern blots
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A second locus (Lhb1B) encoding Photosystem II Type I chlorophyll a/b-binding (CAB) polypeptides was identified in Arabidopsis thaliana. This locus carries two genes in an inverted orientation. The predicted sequences of the polypeptides encoded by these two genes show substantial divergence in their amino termini relative to each other and to the proteins encoded by the three Lhb1 CAB genes previously characterized [10], but little divergence within the predicted primary structure of the mature protein. DNA probes derived from seven additional types of tomato CAB genes, encoding chlorophyll a/b-binding polypeptides of several antenna systems of the photosynthetic apparatus, were tested against A. thaliana. Each of these hybridized in Southern blots to unique DNA fragment(s), demonstrating the existence of each of these different types of CAB genes in the genome of A. thaliana. The number of genes encoding each CAB type in A. thaliana was estimated to be similar to that of tomato.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-5028
    Keywords: electron transfer ; light-harvesting complex I ; membrane localization ; photosynthesis ; processing site ; transit peptide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We report here the isolation and nucleotide sequence of a cDNA clone encoding a phtosystem I polypeptide that is recognized by a polyclonal antibody prepared against subunit II of the photosystem I reaction center. The transit peptide processing site was determined to occur after Met50 by N terminal sequencing. The decuced sequence of this protein predicts that the polypeptide has a net positive charge (pI=9.6) and no membrane spanning regions are evident from the hydropathy plot. Based on these considerations and the fact that subunit II is solubilized by alkali treatment of thylakoids, we concluded that subunit II is an extrinsic membrane protein. The absence of hydrophobic regions characteristic of thylakoid transfer domains furthermore implies that subunit II is localized on the stromal side of the membrane.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-5028
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-5028
    Keywords: ribosomes ; chloroplast ; expression library ; rbcS ; GT-1 ; AT-1
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We report here the isolation and nucleotide sequence of tomato cDNA and genomic clones encoding a ubiquitin extension protein homologous to the yeast gene ubi3. Sites similar to upstream activating sites commonly found in the promoters of yeast ribosomal genes were observed in the tomato promoter. The tomato ubi3 promoter also contained elements found in the rbcS promoter from pea. The transcription initiation site was determined to occur 66 bp upstream of the initiating Met. RFLP mapping revealed that the gene was located on chromosome 1, 23 cM from marker TG301. A ubi3 gene-specific probe hybridized to a single 800 nt transcript. Expression was reduced in heat-shocked plants and plants kept in the dark. Expression was highest in young leaves and immature green fruit and lowest in mature leaves and petals. We isolated the original cDNA clone using an antibody prepared against chloroplast polypeptides. Immunological studies did not detect ubiquitin or ubiquitin extension proteins in the chloroplast. However, higher-molecular-weight chloroplast proteins were detected with ubiquitin antisera suggesting that ubiquitin conjugates are transported into the chloroplast.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Plant molecular biology 18 (1992), S. 995-996 
    ISSN: 1573-5028
    Keywords: 23 kDa ; oxygen-evolving complex ; photosystem II ; Lycopersicon esculentum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Plant molecular biology 15 (1990), S. 157-160 
    ISSN: 1573-5028
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Plant molecular biology 15 (1990), S. 437-448 
    ISSN: 1573-5028
    Keywords: chromosomes ; DNA breaks ; heteroduplex DNA ; gene duplication ; recombination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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