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  • 1
    Publication Date: 2010-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gleick, P H -- Adams, R M -- Amasino, R M -- Anders, E -- Anderson, D J -- Anderson, W W -- Anselin, L E -- Arroyo, M K -- Asfaw, B -- Ayala, F J -- Bax, A -- Bebbington, A J -- Bell, G -- Bennett, M V L -- Bennetzen, J L -- Berenbaum, M R -- Berlin, O B -- Bjorkman, P J -- Blackburn, E -- Blamont, J E -- Botchan, M R -- Boyer, J S -- Boyle, E A -- Branton, D -- Briggs, S P -- Briggs, W R -- Brill, W J -- Britten, R J -- Broecker, W S -- Brown, J H -- Brown, P O -- Brunger, A T -- Cairns, J Jr -- Canfield, D E -- Carpenter, S R -- Carrington, J C -- Cashmore, A R -- Castilla, J C -- Cazenave, A -- Chapin, F S 3rd -- Ciechanover, A J -- Clapham, D E -- Clark, W C -- Clayton, R N -- Coe, M D -- Conwell, E M -- Cowling, E B -- Cowling, R M -- Cox, C S -- Croteau, R B -- Crothers, D M -- Crutzen, P J -- Daily, G C -- Dalrymple, G B -- Dangl, J L -- Darst, S A -- Davies, D R -- Davis, M B -- De Camilli, P V -- Dean, C -- DeFries, R S -- Deisenhofer, J -- Delmer, D P -- DeLong, E F -- DeRosier, D J -- Diener, T O -- Dirzo, R -- Dixon, J E -- Donoghue, M J -- Doolittle, R F -- Dunne, T -- Ehrlich, P R -- Eisenstadt, S N -- Eisner, T -- Emanuel, K A -- Englander, S W -- Ernst, W G -- Falkowski, P G -- Feher, G -- Ferejohn, J A -- Fersht, A -- Fischer, E H -- Fischer, R -- Flannery, K V -- Frank, J -- Frey, P A -- Fridovich, I -- Frieden, C -- Futuyma, D J -- Gardner, W R -- Garrett, C J R -- Gilbert, W -- Goldberg, R B -- Goodenough, W H -- Goodman, C S -- Goodman, M -- Greengard, P -- Hake, S -- Hammel, G -- Hanson, S -- Harrison, S C -- Hart, S R -- Hartl, D L -- Haselkorn, R -- Hawkes, K -- Hayes, J M -- Hille, B -- Hokfelt, T -- House, J S -- Hout, M -- Hunten, D M -- Izquierdo, I A -- Jagendorf, A T -- Janzen, D H -- Jeanloz, R -- Jencks, C S -- Jury, W A -- Kaback, H R -- Kailath, T -- Kay, P -- Kay, S A -- Kennedy, D -- Kerr, A -- Kessler, R C -- Khush, G S -- Kieffer, S W -- Kirch, P V -- Kirk, K -- Kivelson, M G -- Klinman, J P -- Klug, A -- Knopoff, L -- Kornberg, H -- Kutzbach, J E -- Lagarias, J C -- Lambeck, K -- Landy, A -- Langmuir, C H -- Larkins, B A -- Le Pichon, X T -- Lenski, R E -- Leopold, E B -- Levin, S A -- Levitt, M -- Likens, G E -- Lippincott-Schwartz, J -- Lorand, L -- Lovejoy, C O -- Lynch, M -- Mabogunje, A L -- Malone, T F -- Manabe, S -- Marcus, J -- Massey, D S -- McWilliams, J C -- Medina, E -- Melosh, H J -- Meltzer, D J -- Michener, C D -- Miles, E L -- Mooney, H A -- Moore, P B -- Morel, F M M -- Mosley-Thompson, E S -- Moss, B -- Munk, W H -- Myers, N -- Nair, G B -- Nathans, J -- Nester, E W -- Nicoll, R A -- Novick, R P -- O'Connell, J F -- Olsen, P E -- Opdyke, N D -- Oster, G F -- Ostrom, E -- Pace, N R -- Paine, R T -- Palmiter, R D -- Pedlosky, J -- Petsko, G A -- Pettengill, G H -- Philander, S G -- Piperno, D R -- Pollard, T D -- Price, P B Jr -- Reichard, P A -- Reskin, B F -- Ricklefs, R E -- Rivest, R L -- Roberts, J D -- Romney, A K -- Rossmann, M G -- Russell, D W -- Rutter, W J -- Sabloff, J A -- Sagdeev, R Z -- Sahlins, M D -- Salmond, A -- Sanes, J R -- Schekman, R -- Schellnhuber, J -- Schindler, D W -- Schmitt, J -- Schneider, S H -- Schramm, V L -- Sederoff, R R -- Shatz, C J -- Sherman, F -- Sidman, R L -- Sieh, K -- Simons, E L -- Singer, B H -- Singer, M F -- Skyrms, B -- Sleep, N H -- Smith, B D -- Snyder, S H -- Sokal, R R -- Spencer, C S -- Steitz, T A -- Strier, K B -- Sudhof, T C -- Taylor, S S -- Terborgh, J -- Thomas, D H -- Thompson, L G -- Tjian, R T -- Turner, M G -- Uyeda, S -- Valentine, J W -- Valentine, J S -- Van Etten, J L -- van Holde, K E -- Vaughan, M -- Verba, S -- von Hippel, P H -- Wake, D B -- Walker, A -- Walker, J E -- Watson, E B -- Watson, P J -- Weigel, D -- Wessler, S R -- West-Eberhard, M J -- White, T D -- Wilson, W J -- Wolfenden, R V -- Wood, J A -- Woodwell, G M -- Wright, H E Jr -- Wu, C -- Wunsch, C -- Zoback, M L -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 May 7;328(5979):689-90. doi: 10.1126/science.328.5979.689.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20448167" target="_blank"〉PubMed〈/a〉
    Keywords: *Climate Change ; Politics ; Public Policy ; Research/standards ; Research Personnel
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-10-29
    Description: An analysis of major U.S. crops shows that there is a large genetic potential for yield that is unrealized because of the need for better adaptation of the plants to the environments in which they are grown. Evidence from native populations suggests that high productivity can occur in these environments and that opportunities for improving production in unfavorable environments are substantial. Genotypic selection for adaptation to such environments has already played an important role in agriculture, but the fundamental mechanisms are poorly understood. Recent scientific advances make exploration of these mechanisms more feasible and could result in large gains in productivity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boyer, J S -- New York, N.Y. -- Science. 1982 Oct 29;218(4571):443-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17808529" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 133 (1999), S. 361-369 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Intertidal macroalgae may spend a significant part of their lives in air. During photosynthesis in air, they encounter much lower concentrations of inorganic carbon than in seawater. Because they accumulate inorganic carbon from seawater, we investigated whether they similarly accumulate it from air. We measured photosynthesis in the intertidal species Fucus vesiculosus L. during 1990 and 1991 with a gas-phase O2 electrode or CO2-exchange apparatus in air and with a liquid-phase O2 electrode in seawater. Maximum rates were rapid and similar in air and seawater regardless of the method. Tissue from seawater could carry on photosynthesis in CO2-free air, indicating that carbon was stored in the tissue. After 2 h, this store was depleted and photosynthesis ceased. Supplying CO2 in air replenished the store. Under identical conditions, terrestrial C3 and C4 species showed no evidence of this store, but a CAM (crassulacean acid metabolism) species did. However, in contrast to the CAM behavior, F. vesiculosus did not store CO2 significantly in the dark. We found a small acid-releasable pool of carbon in the tissue that disappeared as photosynthesis depleted the carbon store. However, the pool was too small to account for the total carbon stored. While CO2 was being acquired or released from the store in the light, photosynthesis was not inhibited by 21% O2. These results indicate that there are two parallel paths for the supply of CO2 to photosynthesis. The first depends on inorganic carbon in seawater or in air and supports rapid photosynthesis. The second involves CO2 slowly released from an organic intermediate. The release protects CO2 fixation from the inhibitory effects of 21% O2. Photosynthesis in F. vesiculosus thus appears to be C3-like in its rapid fixation of CO2 from a small inorganic pool into phosphoglycerate. However, it is C4-like in its pre-fixation of carbon in an organic pool in the light, and is CAM-like in its ability to slowly use this pool as a sole source of CO2. The organic pool may serve to protect photosynthetic CO2 fixation against the inhibitory effects of O2 in air and in the boundary layer in seawater.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 36 (1985), S. 473-516 
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Phytopathology 33 (1995), S. 251-274 
    ISSN: 0066-4286
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Biology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 20 (1969), S. 351-364 
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 14 (1991), S. 0 
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Wphen there is no external source of water, plants can grow by mobilizing internal water from nongrowing tissues. We investigated how this internal water moves by measuring continuously and simultaneously the water potential (ψw) of soybean (Glycine max L. Merr.) seedlings in the upper, growing stem tissues and the lower, non-growing stem tissues. When external water was available to the roots, the stems grew rapidly and the ψw of the growing tissue was continually below that of the nongrowing tissue and the medium around the roots. This indicated that a growth-induced gradient in ψw favoured water movement from the external source to the growing cells. When the external source was removed, the ψw of the growing tissue remained constant for a time and the ψw of the nongrowing tissue decreased somewhat. Growth took place slowly as water was withdrawn from the nongrowing tissue but ψw gradients continued to favour water transport to the growing cells. On the other hand, if this internal source was removed by excision, growth ceased abruptly. In this case, the cell walls relaxed and the ψw of the growing tissue decreased by about 0.1 MPa instead of remaining constant. The ψw of the detached nongrowing tissues remained constant instead of decreasing. This indicates not only that water mobilization required attached nongrowing or slowly growing tissues but also that mobilization affected wall relaxation. Thus, ψw differences may mobilize internal water, may explain the continued growth of plants and plant parts removed from external sources of water, and may account for discrepancies in measurements of cell wall properties in growing tissues.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 14 (1991), S. 0 
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Water uptake is required when plants enlarge but growth may also occur when no external water is present. To determine whether this growth also depends on water, we studied etiolated seedlings of soybean (Glycine max L. Merr.) deprived of external water by transplanting to vermiculite of low water content or by transferring to water-saturated air. When the external water supply was decreased or removed, the roots continued to grow rapidly but the stems abruptly decreased in growth (in 1 min) and continued to grow slowly. The stem tissues gained water content in the upper elongating region and lost water content in the basal region. Removal of the basal stem caused growth to slow further. When all tissues surrounding the stem elongating region were removed simultaneously, stem growth decreased abruptly to near zero. Control experiments showed that the decreased growth was not caused by wounding or the removal of the auxin or nutrient supply. It is concluded that growth always depended on a source of water and, when external supplies were absent, internal water was mobilized to enlarging tissues of shoots and roots mostly from the basal stem tissues in these seedlings.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 16 (1993), S. 0 
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: When the steins of dark-grown soybean [Glycine max (L.) Merr.] seedlings grew rapidly at favorable temperatures in saturating humidities, a water potential of about 0·2 MPa was induced by growth ($pSo-$pSw, where $pSo is the water potential of the basal nonelongating tissue and $pSw is the water potential of the elongating tissue). If this water potential was caused by high concentrations of solute in the apoplast, as has been proposed, lowering the temperature should have little effect on the potential. On the other hand, if the water potential was caused by apoplast tensions generated by growth, then the tensions should disappear as growth is inhibited by low temperatures. We observed that the growth-induced water potential became too small to detect when growth was inhibited by temperatures as low as 13—5 °C. The disappearance was observed as a rise in apoplast water potential using a thermocouple psychrometer for intact plants, a rise in cell turgor using a miniature pressure probe and a decrease in apoplast tensions using a pressure chamber. The disappearance was not caused by a loss of solute from the apoplast because the tensions fully accounted for the growth-induced water potential at all temperatures. The results are consistent with the lack of solute measured directly in the apoplast solutions at high temperatures (Nonami & Boyer 1987). Therefore, it was concluded that little solute was present in the apoplast at any temperature, and the growth-induced water potential was associated mostly with a tension that moved water from the xylem and into the surrounding cells to meet the demand of cell enlargement.
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 99 (1997), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Root-cap mucilage from aerial nodal roots of maize has been found to have water potential values of −11 MPa or lower when air dried. The value approaches 0 MPa within 2 min of hydration in distilled water. In this time the expanding gel absorbs only about 0.3% of the water content of fully expanded mucilage. It is concluded that the root-cap mucilage per se has almost no capacity to retain water in the rhizosphere. Any function that it may play in the slowing of root desiccation would be indirect. For example, mucilage might decrease pore size between and within soil aggregates by pulling the particles together in a cycle of nocturnal efflux of water from the root surface, and diumal dyring during transpiration.
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