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  • 1
    Electronic Resource
    Electronic Resource
    Factors Affecting the Determination of Hydroxyproline. (1964)
    s.l. : American Chemical Society
    Analytical chemistry 36 (1964), S. 950-952 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60210a082
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  • 2
    Electronic Resource
    Electronic Resource
    Regulation of respiration in roots of barley (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 73 (1988), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The regulation of respiration in roots of barley [Hordeum distichum (L.) Lam. cv. Maris Mink] was examined in terms of the supply of carbohydrate and control by adenylates. The carbohydrate content of roots was modified by selective pruning and feeding sucrose (25 mM) and rates of O2 uptake were measured 16–24 h later. Pruning roots to a single seminal axis increased the soluble sugar content of the sole remaining root by 30% and its rate of O2 uptake by 24%: pruning shoots so that all but the second leaf was removed lowered the soluble sugar content of the roots by 39% and their rate of O2 uptake by 34%. Changes in the rate of O2 uptake were due largely to adjustments in activity of the cytochrome path (vcyt): these changes were accompanied by comparable adjustments in capacity of the path (Vcyt) so that it always operated close to full engagement (=90%). The capacity of the alternative path was unchanged and in no case was there any engagement. Since the alternative path failed to engage over a wide range of carbohydrate contents, we conclude that this path does not function as a simple energy overflow in barley roots. Irrespective of pruning treatment respiration appeared to be limited directly by the turnover of ATP since rates of O2 uptake were stimulated by the uncoupler FCCP, but not by short-term (〈 1 h) feeding of sucrose. However, long-term feeding of sucrose (16–24 h) to roots of leaf-pruned and control plants resulted in an increase in both vcyt and Vcyt. It is proposed that whilst the rate of O2 uptake is regulated directly by the turnover of ATP, some energy-consuming processes might be sensitive to the carbohydrate concentration: changes in supply of carbohydrate with selective pruning or sucrose feeding may alter rates of these processes and regulate vcyt through changes in energy demand. The nature of adjustments in Vcyt and the possible role of the alternative path are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1988.tb00598.x
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  • 3
    Electronic Resource
    Electronic Resource
    THE BIOMETRY OF PLANT GROWTH (Book). (1982)
    Oxford, UK : Blackwell Publishing
    Plant, cell & environment 5 (1982), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1365-3040.ep11572635
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  • 4
    Electronic Resource
    Electronic Resource
    The effects of increased atmospheric carbon dioxide and temperature on carbon partitioning, source-sink relations and respiration (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 14 (1991), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Herbaceous C3 plants grown in elevated CO2 show increases in carbon assimilation and carbohydrate accumulation (particularly starch) within source leaves. Although changes in the partitioning of biomass between root and shoot occur, the proportion of this extra assimilate made available for sink growth is not known. Root:shoot ratios tend to increase for CO2-enriched herbaceous plants and decrease for CO2-enriched trees. Root:shoot ratios for cereals tend to remain constant. In contrast, elevated temperatures decrease carbohydrate accumulation within source and sink regions of a plant and decrease root:shoot ratios. Allometric analysis of at least two species showing changes in root: shoot ratios due to elevated CO2 show no alteration in the whole-plant partitioning of biomass. Little information is available for interactions between temperature and CO2. Cold-adapted plants show little response to elevated levels of CO2, with some species showing a decline in biomass accumulation. In general though, increasing temperature will increase sucrose synthesis, transport and utilization for CO2-enriched plants and decrease carbohydrate accumulation within the leaf. Literature reports are discussed in relation to the hypothesis that sucrose is a major factor in the control of plant carbon partitioning. A model is presented in support.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1991.tb01445.x
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  • 5
    Electronic Resource
    Electronic Resource
    Compartmentation and fluxes of carbon in leaf blades and leaf sheaths of Poa annua L. and Poa x jemtlandica (Almq.) Richt (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 11 (1988), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The allocation of photosynthetically fixed carbon in the leaf blades and sheaths of Poa annua (a ruderal grass) and Poa x jemtlandica (a sub-arctic grass) was followed over a light-dark cycle. Labelling with 14Carbon and gas exchange measurements provide data for an eight-compartment model describing the partitioning of carbon between spatially and chemically separated pools and their rates of turnover. Soluble sugars and fructans were turned over rapidly in the leaf blades of both species. The flux of carbon through pools of storage carbohydrates was higher in the leaves of P. x jemtlandica than in P. annua. The exchange of carbon between pools was slower in the sheath than the blade. Carbohydrates stored in the sheath appeared to have no significant role in metabolism over the light-dark cycle studied here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1988.tb01792.x
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  • 6
    Electronic Resource
    Electronic Resource
    The respiratory source of CO2 (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 8 (1985), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Approximately half of the carbon plants fix in photosynthesis is lost in dark respiration. The major pathways for dark respiration and their control are briefly discussed in the context of a growing plant. It is suggested that whole-plant respiration may be largely ADP-limited and that fine control of the respiratory network serves to select the respiratory substrate and to partition carbon between the numerous possible fates within the network. The striking stoichiometry between whole-plant growth and respiration is reviewed, and the relationships between substrate-limited growth and ADP-limited respiration are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1985.tb01678.x
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  • 7
    Electronic Resource
    Electronic Resource
    A compartmental model of carbon allocation in the vegetative barley plant (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 4 (1981), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. The allocation of carbon in a vegetative barley plant is described as an open, three-compartment model; the three compartments are soluble (which exchanges material with the environment), storage, and structure (both of which exchange material with the soluble compartment). The model shows a good fit with data on 14C kinetics following 14CO2 feeding and some of its assumptions, properties and implications are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1365-3040.ep11604551
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  • 8
    Electronic Resource
    Electronic Resource
    Sink strength: What is it and how do we measure it? Introduction (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 16 (1993), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1996.tb02047.x
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  • 9
    Electronic Resource
    Electronic Resource
    Sink strength: What is it and how do we measure it? A summary (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 16 (1993), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1996.tb02061.x
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  • 10
    Electronic Resource
    Electronic Resource
    Cell specialization within the parenchymatous bundle sheath of barley (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 12 (1989), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Structural and physiological aspects of the parenchymatous bundle sheath (PBS) were studied in cultivars of Hordeum distichum L. The PBS of intermediate, lateral and midrib veins consisted of a single layer of cells closely appressed to the mestome sheath. These cells were large, vacuolate and approximately cylindrical in shape, extending parallel to the vein. Mean PBS cell volume was 4 × 10−5mm3 compared to 1.23 × 10−5mm3 for mesophyll cells. Transverse sections revealed three cell types within the PBS, cells with small chloroplasts (S-type), cells with large chloroplasts (L-type) and structural cells. The majority of cells were S-type, containing chloroplasts of approximately a third of the volume of mesophyll chloroplasts; they were able to reduce tetranitro blue-tetrazolium and synthesize starch. Structural cells interrupted the phloem and xylem are of the sheath in lateral veins and the midrib, whilst between one and four PBS cells within the phloem are of each vein type contained chloroplasts similar in volume and starch content to those of the mesophyll. Only these L-type cells contained noticeable starch grains at the end of an 8-h dark period, a further 4 h darkness being required for complete mobilization of starch. Starch deposition within S-type and structural cells was detectable after 4 h illumination but was only appreciable in leaves excised from the plant and illuminated for 9–12 h. The role of S-type PBS cells in assimilate transport is discussed in relation to these findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1989.tb01970.x
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