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  1. Internal and external control of net photosynthesis and stomatal conductance of mature eastern white pine (Pinus strobus)

    Leaf gas exchange and water relations were monitored in the upper canopy of two 25 m tall eastern white pine (Pinus strobus L.) trees over two consecutive growing seasons (1986 and 1987). Examination of the seasonal and diurnal patterns of net photosynthesis and leaf conductance showed that both internal and external (environmental) factors were...

    Author(s):
    Chris A. Maier; R.O. Teskey
    Year:
    1992
    Keywords:
    Source:
    Can. J. For. Res. 22: 1387-1394.

  2. Carbohydrate regulation of photosynthesis and respiration from branch girdling in four species of wet tropical rain forest trees

    How trees sense source-sink carbon balance remains unclear. One potential mechanism is a feedback from non-structural carbohydrates regulating photosynthesis and removing excess as waste respiration when the balance of photosynthesis against growth and metabolic activity changes. We tested this carbohydrate regulation of photosynthesis and respiration using branch...

    Author(s):
    Shinichi Asao; Michael G. Ryan
    Year:
    2015
    Keywords:
    non-structural carbohydrates, NSC, phloem, sink regulation
    Source:
    Tree Physiology. 35: 608-620.

  3. Photosynthesis and water relations of the mistletoe, Phoradendron villosum, and its host, the California valley oak, Quercus lobata

    Water vapor and CO2 exchange characteristics were studied in Phoradendron villosum, a hemiparasitic mistletoe and its host, Quercus lobata. The hemiparasite had stomatal conductances equal to or higher than the host but a much lower capacity to fix carbon. Respiration was high in the mistletoe relative to...

    Author(s):
    David Y. Hollinger
    Year:
    1983
    Keywords:
    Source:
    Oecologia. 60: 396-400.

  4. Leaf area and net photosynthesis during development of Prunus serotina seedlings

    We used the plastochron index to study the relationship between plant age, leaf age and development,
    and net photosynthesis of black cherry (Prtmus serotina Ehrh.) seedlings. Leaf area and net photosynthesis
    were measured on all leaves >=75 mm of plants ranging in age from 7 to 20 plastochrons. Effects
    of plant developmental stage...

    Author(s):
    Stephen B. Horsley; Kurt W. Gottschalk
    Year:
    1993
    Keywords:
    developmental stage, leafage, leaf area. plastochron index, regression models, seedling survival
    Source:
    Tree Physiology. 12: 55-69.

  5. Winter photosynthesis in red spruce (Picea rubens Sarg.): limitations, potential benefits, and risks

    Numerous cold-induced changes in physiology limit the capacity of northern conifers to photosynthesize during winter. Studies of red spruce (Picea rubens Sarg.) have shown that rates of field photosynthesis (Pfield) and laboratory measurements of photosynthetic capacity (Pmax) generally parallel seasonal...

    Author(s):
    P.G. Schaberg
    Year:
    2000
    Keywords:
    Source:
    Arctic, Antarctic, and Alpine Research. 32: 375-380.

  6. Daily xanthophyll cycle photoprotection in developing leaves prior to photosynthesis

    There is widespread agreement that the xanthophyll cycle provides a major photoprotection system for photosynthesis in green leaves.Indeed this type of photoprotection seem to be ubiquitous for photosynthetic organisms. Photoprotection is provided via a rapid, near 10-13 sec, ability of zeaxanthin (Z) to dissipate excess light energy from photosynthesis because the...

    Author(s):
    M.N. Angelov; Shi-Jean S. Sung; C.C. Black
    Year:
    1995
    Keywords:
    Source:
    Pages 25-29 in Proc. Photoinhibition, Photoprotection, and Crop Productivity, Guangdong Society of Plant Physiology, China.

  7. Changes in photosynthesis and soil moisture drive the seasonal soil respiration-temperature hysteresis relationship

    In nearly all large-scale terrestrial ecosystem models, soil respiration is represented as a function of soil temperature. However, the relationship between soil respiration and soil temperature is highly variable across sites and there is often a pronounced hysteresis in the soil respiration-temperature relationship over the course of the growing season. This...

    Author(s):
    Quan Zhang; Richard P. Phillips; Stefano Manzoni; Russell L. Scott; A. Christopher Oishi; Adrien Finzi; Edoardo Daly; Rodrigo Vargas; Kimberly A. Novick
    Year:
    2018
    Keywords:
    CO2 efflux, FLUXNET, Q10 model, time lag
    Source:
    Agricultural and Forest Meteorology

  8. 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.

  9. Seasonal photosynthesis and water relations of juvenile loblolly pine relative to stand density and canopy position

    To assess the effects of stand density and canopy environment on tree physiology, we measured gas exchange responses of the same needle age class of 16-year-old loblolly pines (Pinus taeda L.) in thinned (512 trees ha-1) and non-thinned treatment plots (2,863 trees ha-1) in central Louisiana....

    Author(s):
    Zhenmin Tang; Jim L. Chambers; Mary A. Sword Sayer; James P. Barnett
    Year:
    2003
    Keywords:
    photosynthetic response, Pinus taeda, stomatal conductance, thinning, transpiration
    Source:
    Trees (2003)17: 424-430

  10. Winter photosynthesis of red spruce from three Vermont seed sources

    We evaluated winter (January through March) carbon assimilation of red spruce (Picea rubens Sarg.) from three Vermont seed sources grown in a common garden in northwestern Vermont. Although CO2 exchange rates were generally low, net photosynthetic rates increased during two prolonged thaws. Significant correlations between CO...

    Author(s):
    P.G. Schaberg; R.C. Wilkinson; J.B. Shane; J.R. Donnelly; P.F. Cali
    Year:
    1995
    Keywords:
    carbon assimilation, carbon exchange, genetic variation, leaf conductance, Picea rubens, stomatal aperture, temperature.
    Source:
    Tree Physiology. 15: 345-350.

  11. Applying photosynthesis research to increase crop yields

    This account is dedicated to Dr. Guivi Sanadze for his career long devotion to science and in recognition of his discovery of isoprene emission by trees during photosynthesis. Investigations on the emission of isoprene and other monoterpenes now have been extended globally to encompass other terrestrial vegetation, algae, waters, and marine life in the world's...

    Author(s):
    Clayton C. Black; Shi-Jean S. Sung; Kristina Toderich; Pavel Yu Voronin
    Year:
    2010
    Keywords:
    photosynthesis, photoprotection, xantophyll cycle, light interception, crop yield, plant growth
    Source:
    Bulletin of the Georgian National Academy of Sciences 4(1):101-110

  12. Adaptation of sugar maple populations along altitudinal gradients: photosynthesis, respiration, and specific leaf weight

    Sugar maple seeds were collected from populations spaced along two altitudinal gradients in the White Mountains of New Hampshire. When grown in a uniform environment, progeny of stands less than 0.8 km apart differed significantly in photosynthesis, respiration, and leaf characteristics, despite a lack of physical barriers to gene migration. Sugar maple is a long-lived...

    Author(s):
    F. Thomas Ledig; Donald R. Korbobo
    Year:
    1983
    Keywords:
    Source:
    American Journal of Botany 70(2):256-265

  13. Inferring terrestrial photosynthetic light use efficiency of temperate ecosystems from space

    Terrestrial ecosystems absorb about 2.8 Gt C yr−1, which is estimated to be about a quarter of the carbon emitted from fossil fuel combustion. However, the uncertainties of this sink are large, on the order of ±40%, with spatial and temporal variations largely unknown. One of the largest factors contributing to the uncertainty is photosynthesis,...

    Author(s):
    Thomas Hilker; Nicholas C. Coops; Forest G. Hall; Caroline J. Nichol; Alexei Lyapustin; T. Andrew Black; Michael A. Wulder; Ray Leuning; Alan Barr; David Y. Hollinger; Bill Munger; Compton J. Tucker
    Year:
    2011
    Keywords:
    Source:
    Journal of Geophysical Research. 116: G03014. 11 pp

  14. Photosynthetic capacity of red spruce during winter

    We measured the photosynthetic capacity (Pmax) of plantation-grown red spruce (Picea rubens Sarg.) during two winter seasons (1993-94 and 1994-95) and monitored field photosynthesis of these trees during one winter (1993-94). We also measured Pmax for mature montane trees from January through May 1995....

    Author(s):
    P.G. Schaberg; J.B. Shane; P.F. Cali; J.R. Donnelly; G.R. Strimbeck
    Year:
    1998
    Keywords:
    photosynthesis, Picea rubens, temperature, winter thaw
    Source:
    Tree Physiology. 18. 271-276.

  15. Effects of spring prescribed fire on short-term, leaf-level photosynthesis and water use efficiency in longleaf pine

    Fire is a natural and important environmental disturbance influencing the structure, function, and composition of longleaf pine (Pinus palustris Mill.) ecosystems. However, recovery of young pines to leaf scorch may involve changes in leaf physiology, which could influence leaf water-use efficiency (WUE). This work is part of a larger seasonal...

    Author(s):
    John K. Jackson; Dylan N. Dillaway; Michael C. Tyree; Mary Anne Sword Sayer
    Year:
    2015
    Keywords:
    prescribed fire, photosynthesis, water use efficiency, longleaf pine, Pinus palustris, leaf scorch
    Source:
    In: Holley, A. Gordon; Connor, Kristina F.; Haywood, James D., eds. Proceedings of the 17th biennial southern silvicultural research conference. e–Gen. Tech. Rep. SRS–203, Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station: 208-214.

  16. Why don't our stands grow even faster? Control of production and carbon cycling in eucalypt plantations

    The growth of Eucalyptus stands varies several fold across sites, under the influence of resource availability, stand age and stand structure. We describe a series of related studies that aim to understand the mechanisms that drive this great range in stand growth rates. In a seven-year study in Hawaii of Eucalyptus saligna at a...

    Author(s):
    M.G. Ryan; D. Binkley; J.L. Stape
    Year:
    2008
    Keywords:
    age-related productivity decline, carbon allocation, forest production ecology, nutrition
    Source:
    Southern Forests. 70(2): 99-104.

  17. Three decades of research at Flakaliden advancing whole-tree physiology, forest ecosystem and global change research

    Nutrient supply often limits growth in forest ecosystems and may limit the response of growth to an increase in other resources, or to more favorable environmental factors such as temperature and soil water. To explore the consequences and mechanisms of optimum nutrient supply for forest growth, the Flakaliden research site was established in 1986 on a young Norway...

    Author(s):
    Michael G. Ryan
    Year:
    2013
    Keywords:
    autotrophic respiration, δ13C, elevated [CO2], long-term research, Norway spruce, photosynthetic recovery, Picea abies, soil respiration, soil warming, temperature, tree nutrition, whole-tree chamber, wood formation
    Source:
    Tree Physiology. 33: 1123-1131.

  18. 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

  19. Cloud immersion alters microclimate, photosynthesis and water relations in Rhododendron catawbiense and Abies fraseri seedlings in the southern Appalachian Mountains, USA

    The high altitude spruce-fir (Abies fraseri (Pursh) Poiret.-Picea rubens Sarg.) forests of the southern Appalachian Mountains, USA, experience frequent cloud immersion. Recent studies indicate that cloud bases may have risen over the past 30 years, resulting in less frequent forest cloud immersion, and that further increases in cloud base height are...

    Author(s):
    Daniel M. Johnson; William K. Smith
    Year:
    2008
    Keywords:
    altitude, climate change, diffuse light, fog, photo-inhibition, transpiration
    Source:
    Tree Physiology, Vol. 28: 385-392

  20. Cloud immersion alters microclimate, photosynthesis and water relations in Rhododendron catawbiense and Abies fraseri seedlings in the southern Appalachian Mountains, USA

    The high altitude spruce-fir (Abies fraseri (Pursh) Poiret.-Picea rubens Sarg.) forests of the southern Appalachian Mountains, USA, experience frequent cloud immersion. Recent studies indicate that cloud bases may have risen over the past 30 years, resulting in less frequent forest cloud immersion, and that further increases in...

    Author(s):
    Daniel M. Johnson; William K. Smith
    Year:
    2008
    Keywords:
    Source:
    Tree Physiology, Vol. 28, p. 385-392

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