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Showing 1 to 20 of 36 for “"water potentials"”.
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Regulation of Seat-patch Water Potentials in Anurans
Decades of research on water exchange in frogs have assumed that blood osmotic potential drives water uptake. However, more recent reports have suggested an intermediate control of the water potential partially separate from the osmotic potential of blood. Some reports have speculated that …
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Effects of Low Tissue Water Potentials on the Growth of Soybean Hypocotyls
Made available in DSpace on 2014-12-11T18:28:24Z (GMT). No. of bitstreams: 1 7414584.pdf: 3263841 bytes, checksum: b5916a9cb9da1265d3a01529a3764b8d (MD5) Previous issue date: 1974
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Nitrate-Reductase Activity and Polyribosomal Content of Corn Having Low Leaf Water Potentials
Made available in DSpace on 2015-05-14T14:57:39Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7317182.PDF: 1879390 bytes, checksum: 2cd09ebc47ed81fe0cf6c2e2703b1ee2 (MD5) Previous issue date: 1972
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Mechanism of Cell Enlargement at Low Water Potentials (growth-Induced, Turgor, Hydraulic Conductance, Wall)
… enlargement in plants is often inhibited at low water potentials (low (psi)(,w)), but the cause is not completely understood. This work was conducted to identify the primary signal(s) that initiate the inhibition and the factors controlling rates of enlargement at low (psi)(,w).
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Part I. Acetylene Reduction (Nitrogen Fixation) and Metabolic Activities of Soybean Having Various Leaf and Nodule Water Potentials. Part Ii. Limitation of Acetylene Reduction (Nitrogen Fixation) by Photosynthesis in Soybean Having Low Water Potentials
Made available in DSpace on 2015-05-14T14:57:43Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7514123.PDF: 2516307 bytes, checksum: 43d40b90ff2b137dd124be55c0198660 (MD5) Previous issue date: 1975
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Water-Potential Gradients and Resistances in a Soil-Plant System as Affected by Soil-Water Potentials
Made available in DSpace on 2014-12-12T00:18:01Z (GMT). No. of bitstreams: 1 7414599.pdf: 3557734 bytes, checksum: 9ee0edbfc528f4e27e52fbcc01b8f683 (MD5) Previous issue date: 1974
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Regulation of Nitrate Reductase and Ribonuclease Activities in Maize (Zea Mays L.) Leaves Having Low Water Potentials
Made available in DSpace on 2015-05-14T15:09:59Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7616194.PDF: 3791124 bytes, checksum: 64ea05c7afd52ade16345d09e7078c2d (MD5) Previous issue date: 1976
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A Hydrothermal After-ripening Time Model of Seed Dormancy Loss in Bromus tectorum
… is associated with a decrease in the mean base water potential, one of the parameters of hydrothermal time. The rate of change of the mean base water potential is assumed to be a linear function of temperature above a specific base temperature and as a result can be described by a thermal …
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Physiological response of loblolly pine seedlings to moisture-stress conditioning and their subsequent performance during water stress
… of loblolly pine (Pinus taeda I.) during water stress were investigated. Seedlings were subjected to prolonged sublethal drought treatments which included a watered control, a moderate stress treatment (MWS, seedlings watered only when needle water potential reached -0.8 MPa) and a severe …
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Soilless Substrate Hydrology and Subsequent Impacts on Plant-Water Relations of Containerized Crops
Freshwater is a finite resource that is rapidly becoming more scrutinized in agricultural consumption. Specialty crop producers, especially ornamental crop producers, must continually improve production sustainability, with regards to water resource management, in order to continue to stay …
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Effects of Simulated Acid Rain on Physiological Parameters of Field-Grown Corn and Soybeans
… for changes in net photosynthesis, leaf water potentials, and leaf chlorophyll content. Nitrogen fixation, flowering and podding patterns, and dry matter and N partitioning were also measured in soybeans while pollen germination was also measured in corn.
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The influence of in vitro KCl treatments on the water relations and acclimatization of tissue-cultured Flame Azalea (Rhododendron calendulaceum)
… would improve microshoot stomatal function and water status during acclimatization. The effects of the KCl treatments upon subsequent microshoot rooting and percent fresh weight gain were also evaluated. In preliminary experiments, microshoots of the flame azalea (Rhododendron calendulaceum) …
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Abscisic acid : interactions with auxin in the regulation of root growth under water deficit conditions
Water stress has been shown to inhibit shoot growth more than root growth (Sharp et al., 1988). Abscisic acid (ABA) has been shown to be involved in this differential growth response in maize (Zea mays L.) seedlings (Saab et al., 1990; Sharp et al., 1994). ABA accumulates in the elongation zone of …
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Physiological effects of moisture stress, moisture stress conditioning, and leaf area manipulations on black alder seedlings (Alnus glutinosa (L.) Gaertn.)
… MSC significantly decreased the impact of low water potentials on photosynthesis and acetylene reduction. There were no significant improvements in this response with increased MSC periods. Exposure of nodules to dry soil conditions while keeping the host plant hydrated did not significantly …
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Soil and plant water stress in an Appalachian oak forest: its relationship to topography and forest site quality
… was used to investigate soil moisture and plant water stress relationships on the southeast face of Potts mountain in Craig County, Virginia. Topographical effects on available water are especially pronounced during low late season rainfall levels encountered in the Ridge and Valley physiographic …
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Physiological response of two turfgrass species to increasing drought and salinity stress using a line source gradient
… any diminished turfgrass quality, if total water potentials {dollar}\rm(\Psi\sb{T}){dollar} were maintained above species specific thresholds, where {dollar}\rm\Psi\sb{T}{dollar} is defined as the sum of the matric {dollar}\rm(\Psi\sb{M}){dollar} and osmotic {dollar}\rm(\Psi\sb{\Pi}){dollar} …
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Accurate Computation Of Molecular Properties From Novel Applications Of Quantum Mechanical Wavefunction Methods
… various density functional approximations and water potentials. Lastly, anharmonic vibrational frequencies and dissociation energies have been computed for small hydrogen-bonded dimers, allowing for a direct comparison to experiment.
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Etiologic studies of Verticicladiella procera Kendr. in pine Christmas trees
… sapwood, and that colonized seedlings had lower water potentials than uncolonized seedlings. In addition, it was found that the fungus could persist in resinous stem lesions for 22 months without foliar symptoms, and resinous stem lesions with the fungus were significantly longer and deeper than …
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How Distance from Groundwater Affects the Water Status of Trees at San Marcos Springs
… of landscape topography on karst aquifer freshwater supplies is still poorly understood. To gain perspective on this question, I conducted a study at a site where the depth of a shallow groundwater table was indicated by the water level of a spring-fed lake and the distance of trees from …
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The influence of water and light on the physiology and spatial distributions of three shrubs in the Southern Appalachian Mountains
… has a 60 % reduction in photosynthesis at water potentials below -1.0 MPa. <i>R. nudiflorum</i> has only a 30 % reduction and <i>K. latifolia</i> has less than 10 % reduction. Seasonal pressure volume curve determinations, conductance measurements, and water potential measurements of plants …
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