Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search

Show/Hide Search Form

Date Range:
rss feed Subscribe to R&D Publications recently added to Treesearch - RSS feedMore RSS options

Displaying 1 - 20 of 186

Pages

Records Per Page:
Sort By:

  1. Environmental factors influencing Pyrenophora semeniperda-caused seed mortality in Bromus tectorum

    Temperature and water potential strongly influence seed dormancy status and germination of Bromus tectorum. As seeds of this plant can be killed by the ascomycete fungus Pyrenophora semeniperda, this study was conducted to learn how water potential and temperature influence mortality levels in this pathosystem. Separate experiments were conducted to determine: (1) if P...

    Author(s):
    Heather Finch; Phil S. Allen; Susan E. Meyer
    Year:
    2013
    Keywords:
    Bromus tectorum, pathosystem, Pyrenophora semeniperda, seed germination, temperature, time, water potential
    Source:
    Seed Science Research. 23: 57-66.

  2. Does turgor limit growth in tall trees?

    The gravitational component of water potential contributes a standing 0.01 MPa m1 to the xylem tension gradient in plants. In tall trees, this contribution can significantly reduce the water potential near the tree tops. The turgor of cells in buds and leaves is expected to decrease in direct proportion with leaf water potential along a height gradient unless osmotic...

    Author(s):
    D.R. Woodruff; B.J. Bond; F.C. Meinzer
    Year:
    2004
    Keywords:
    Pseudotsuga menziesii, Douglas-fir, gravitational component, water potential, height growth, osmotic adjustment, pressure-volume curve, turgor maintenance.
    Source:
    Plant, Cell, and Environment. 27: 229-236

  3. Effects of available water on growth and competition of southern pine beetle associated fungi

    Competitive interactions among bark beetle associated fungi are potentially influenced by abiotic factors. Water potential, in particular, undergoes marked changes over the course of beetle colonization of tree hosts. To investigate the impact of water potential on competition among three southern pine beetle associated fungi, Ophiostoma minus,

    Author(s):
    Kier D. Klepzig; J. Flores-Otero; R.W. Hofstetter; M.P. Ayers
    Year:
    2004
    Keywords:
    Source:
    Mycol. Res. 108(2): 183-188

  4. A hydrothermal after-ripening time model for seed dormancy loss in Bromus tectorum L.

    After-ripening, the loss of dormancy under dry conditions, is associated with a decrease in mean base water potential for germination of Bromus tectorum L. seeds. After-ripening rate is a linear function of temperature above a base temperature, so that dormancy loss can be quantified using a thermal after-ripening time (TAR) model. To incorporate storage water...

    Author(s):
    Necia B. Bair; Susan E. Meyer; Phil S. Allen
    Year:
    2006
    Keywords:
    after-ripening, Bromus tectorum, dormancy loss, hydrothermal after-ripening time, hydrothermal time, modelling, water potential
    Source:
    Seed Science Research. 16: 17-28.

  5. Leaf hydraulic conductance, measured in situ, declines and recovers daily: leaf hydraulics, water potential and stomatal conductance in four temperate and three tropical tree species

    The objectives of this study were to measure Kleaf, using a rehydration kinetics method, (1) in the laboratory (under controlled conditions) across a range of water potentials to construct vulnerability curves (VC) and (2) over the course of the day in the field along with leaf water potential and stomatal conductance. The results presented here...

    Author(s):
    Daniel M. Johnson; David R. Woodruff; Katherien A. McCulloh; Frederick C. Meinzer
    Year:
    2009
    Keywords:
    cavitation, embolism, photosynthesis, transpiration, xylem
    Source:
    Tree Physiology

  6. Modified water regimes affect photosynthesis, xylem water potential, cambial growth and resistance of juvenile Pinus taeda L. to Dendroctonus frontalis (Coleoptera: Scolytidae)

    We modified soil water supply to two groups of juvenile loblolly pines, Pinus taeda L., by sheltering or irrigating root systems in early summer or in later summer and measured oleoresin flow (primary defense), net photosynthesis, xylem water potential, and cambial growth throughout the growing season. When consistent significant differences in...

    Author(s):
    James P. Dunn; Peter L. Jr. Lorio
    Year:
    1993
    Keywords:
    Dendroctonus frontalis, drought, plant defense
    Source:
    Environ. Entomol., Vol. 22(5): 948-957

  7. Water potential in ponderosa pine stands of different growing-stock levels

    Water potential was measured in five ponderosa pine (Pinus ponderosa Laws.) in each of four stands of different growing-stock levels at two locations in the Black Hills of South Dakota. Mean water potentials at dawn and midday varied significantly among growing-stock levels at one location, but differences were not consistent. Mean dawn and midday water potentials...

    Author(s):
    J. M. Schmid; S. A. Mata; R. K. Watkins; M. R. Kaufmann
    Year:
    1991
    Keywords:
    water potential, ponderosa pine, Pinus ponderosa, mountain pine beetle, Dendroctonus ponderosae
    Source:
    Canadian Journal of Forest Research. 21(6): 750-755.

  8. Midday stomatal conductance is more related to stem rather than leaf water status in subtropical deciduous and evergreen broadleaf trees

    Midday depressions in stomatal conductance (gs) and photosynthesis are common in plants. The aim of this study was to understand the hydraulic determinants of midday gs, the coordination between leaf and stem hydraulics and whether regulation of midday gs differed between...

    Author(s):
    Yong-Jiang Zhang; Frederick C. Meinzer; Qi Jin-Hua; Guillermo Goldstein; Cao Kun-Fang
    Year:
    2012
    Keywords:
    leaf phenology, midday depression in photosynthesis, stem hydraulic capacitance, stem water potential, stomatal regulation
    Source:
    Plant, Cell & Environment. 36: 149-158

  9. Hydraulic lift in a neotropical savanna: experimental manipulation and model simulations

    The objective of this study was to assess the magnitude of hydraulic lift in Brazilian savannas (Cerrado) and to test the hypothesis that hydraulic lift by herbaceous plants contributes substantially to slowing the decline of water potential and water storage in the upper soil layers during the dry season. To this effect, field observations of soil water content and...

    Author(s):
    Fabian G. Scholz; Sandra J. Bucci; William A. Hoffmann; Frederick C. Meinzer; Guillermo Goldstein
    Year:
    2010
    Keywords:
    Cerrado, leaf area index, non saturated flow, soil water model, soil water potential recovery
    Source:
    Agricultural and Forest Meteorology. 150: 629-639

  10. Planting depth effects and water potential effects on oak seedling emergence and acorn germination

    The effects of four planting depths (0, 3, 7, 11 cm) and acorn size on the percentage seedling emergence of red, pin, and black oak were determined. In a complimentary study, the effects of five water potential treatments (0, -.2, -.4, -.6, -1.0 MPa) on the percentage germination of red, pin, and black oak acorns were measured.

    Author(s):
    Wayne A. Smiles; Jeffrey O. Dawson
    Year:
    1995
    Keywords:
    Source:
    In: Gottschalk, Kurt W.; Fosbroke, Sandra L. C., ed. Proceedings, 10th Central Hardwood Forest Conference; 1995 March 5-8; Morgantown, WV.: Gen. Tech. Rep. NE-197. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. p.495

  11. Photosynthesis, water relations, and growth of planted Pinus strobus L. on burned sites in the southern Appalachians

    We measured net photosynthesis,leaf conductance, xylem water potential, and growth of Pinus strbus L. seedlings two years after planting on two clear-cut and burned sites in the southern Appalachians. Multiple regression analysis was used to relate seedling net pholosynthesis to vapor pressure deficit, seedling crown temperature, photosynthetically active radiation (...

    Author(s):
    Katherine J. Elliott; James M. Vose
    Year:
    1994
    Keywords:
    Leaf condutance. microenvironment, seed growth.
    Source:
    Tree Physiology 1994. 14.439-454. 16p.

  12. Pure culture response of ectomycorrhizal fungi to imposed water stress

    The ability of ectomycorrhizal fungal isolates to tolerate imposed water stress in pure culture was examined in 55 isolates of 18 species. Water potential treatments, adjusted with polyethylene glycol, were applied to Petri dish units. These units allowed colony diameter measurements of fungi grown on liquid media. Delayed growth initiation and inhibition of growth...

    Author(s):
    Mark D. Coleman; Caroline S. Bledsoe; William Lopushinsky
    Year:
    1989
    Keywords:
    Source:
    Can. J. Bot. 67: 29-39. 1989

  13. Using midday stem water potential to assess irrigation needs of landscape valley oaks

    In a number of deciduous tree crops a reliable pressure chamber measurement of water stress (midday stem water potential or SWP) has been recently developed and found to be closely related to both irrigation regime and tree physiological responses to stress. A standard pressure chamber is used for the measurement of SWP, but prior to sampling, the leaf is enclosed in a...

    Author(s):
    Ken Shackel; Rob Gross
    Year:
    2002
    Keywords:
    Source:
    In: Standiford, Richard B., et al, tech. editor. Proceedings of the Fifth Symposium on Oak Woodlands: Oaks in California's Challenging Landscape. Gen. Tech. Rep. PSW-GTR-184, Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 397-402

  14. Does homeostasis or disturbance of homeostasis in minimum leaf water potential explain the isohydric versus anisohydric behavior of Vitis vinifera L. cultivars?

    Due to the diurnal and seasonal fluctuations in leaf-to-air vapor pressure deficit (D), one of the key regulatory roles played by stomata is to limit transpiration-induced leaf water deficit. Different types of plants are known to vary in the sensitivity of stomatal conductance (gs) to D with important consequences for their survival and growth. Plants that minimize...

    Author(s):
    Jean-Christophe Domec; Daniel M. Johnson
    Year:
    2012
    Keywords:
    Source:
    Tree Physiology 32:245–248

  15. Hydrothermal time models for conidial germination and mycelial growth of the seed pathogen Pyrenophora semeniperda

    Population-based threshold models using hydrothermal time (HTT) have been widely used to model seed germination. We used HTT to model conidial germination and mycelial growth for the seed pathogen Pyrenophora semeniperda in a novel approach to understanding its interactions with host seeds. Germination time courses and mycelial growth rates for P.semeniperda were...

    Author(s):
    Connor W. Barth; Susan E. Meyer; Julie Beckstead; Phil S. Allen
    Year:
    2015
    Keywords:
    Bromus tectorum, matric potential, mean base water potential, osmotic potential, population-based threshold model, supraoptimal water potential
    Source:
    Fungal Biology. 119: 720-730.

  16. Processes preventing nocturnal equilibration between leaf and soil water potential in tropical savanna woody species.

    The impact of nocturnal water loss and recharge of stem water storage on predawn disequilibrium between leaf (ΨL) and soil (Ψ S) water potentials was studied in three dominant tropical savanna woody species in central Brazil (Cerrado). Sap flow continued throughout the night during the dry season and...

    Author(s):
    Sandra Bucci; Fabian G. Scholz; Guillermo Goldstein; Frederick C. Meinzer; Jose A. Hinojosa; William A. Hoffman; Augusto C. Franco
    Year:
    2004
    Keywords:
    capacitance, nocturnal transpiration, sap flow, soil plant-atmosphere continuum, stomata
    Source:
    Tree Physiology. 24: 1119-1127

  17. Growth and physiological responses to varied environments among populations of Pinus ponderosa

    We investigated population responses in physiology, morphology, and growth of mature Pinus ponderosa trees to an environmental gradient across Nebraska, USA. Ten populations from western Nebraska and eastern Wyoming were grown in three 26-year-old provenance tests from the warmest and wettest site in the east (Plattsmouth) to the intermediate site in...

    Author(s):
    Jianwei Zhang; Bert M. Cregg
    Year:
    2005
    Keywords:
    Carbon isotope discrimination, environmental gradient, leaf water potential, water-use efficiency
    Source:
    Forest Ecology and Management, 219: 1-12

  18. Hydraulic redistribution in a Douglas-fir forest: lessons from system manipulations.

    Hydraulic redistribution (HR) occurs in many ecosystems; however, key questions remain about its consequences at the ecosystem level. The objectives of the present study were to quantify seasonal variation in HR and its driving force, and to manipulate the soil-root system to elucidate physiological components controlling HR and utilization of redistributed water. In...

    Author(s):
    J. Renée Brooks; Frederick C. Meinzer; Jeffery M. Warren; Jean-Christophe Domec; Rob Coulombe
    Year:
    2006
    Keywords:
    Pseudotsuga menziesii, deuterium labelling, hydraulic lift, seasonal variation, soil water utilization, soil water potential, trenching, water transport
    Source:
    Plant, Cell and Environment. 29: 138-150

  19. Secondary dormancy induction and release in Bromus tectorum seeds: The role of temperature, water potential and hydrothermal time

    Seeds of the winter annual Bromus tectorum lose primary dormancy in summer and are poised to germinate rapidly in the autumn. If rainfall is inadequate, seeds remain ungerminated and may enter secondary dormancy under winter conditions. We quantified conditions under which seeds enter secondary dormancy in the laboratory and field and also examined whether contrasting...

    Author(s):
    K. K. Hawkins; P. S. Allen; Susan Meyer
    Year:
    2017
    Keywords:
    hydrothermal time model, seed dormancy cycle, seed bank, secondary after-ripening, winter annual
    Source:
    Seed Science Research. doi: 10.1017/S0960258516000258.

  20. Biomass production and potential water stress increase with planting density in four highly productive clonal Eucalyptus genotypes

    The choice of planting density and tree genotype are basic decisions when establishing a forest stand. Understanding the interaction between planting density and genotype, and their relationship with biomass production and potential water stress, is crucial as forest managers are faced with a changing climate. However, few studies have investigated this relationship,...

    Author(s):
    Rodrigo Hakamada; Robert M. Hubbard; Silvio Ferraz; Jose Luiz Stape; Cristiane Lemos
    Year:
    2017
    Keywords:
    Brazil, leaf water potential, plantation, wood productivity
    Source:
    Southern Forests: A Journal of Forest Science. 79(3): 251-257.

Pages

Show More
Show Fewer
Total Publications in Treesearch: 55,799

Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/search?keywords=%22Water+potential%22