Stand microclimate and physiological activity of tree leaves in an oak-hornbeam forest

Marek, Michal V.; Masarovičová, E.; Kratochvílová, Irena; Eliáš, Pavol; Janouš, Dalibor

doi:10.1007/bf00225357

Cited by 16 publications

(8 citation statements)

References 23 publications

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“…In contrast to the relatively extensive literature on morphological acclimation to light availability in conifer crowns, few studies have examined needle-level changes in photosynthetic light response through a mixed species canopy. Studies on leaf-level light acclimation in the crowns of broad-leaved species have shown higher light-saturated photosynthetic rates, light compensation points, and respiration rates in leaves grown in sun rather than in shade (Hollinger 1989, Marek et al 1989, Ellsworth and Reich 1993, Bassow and Bazzaz 1998. Similar shoot-level changes in photosynthetic light response have been observed within the crowns of overstory conifers grown in monoculture (Leverenz and Jarvis 1979, Troeng and Linder 1982, Kull and Koppel 1987.…”

Section: Introductionmentioning

confidence: 66%

Vertical gradients in photosynthetic light response within an old-growth Douglas-fir and western hemlock canopy

et al. 2000

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We examined needle-level light response of photosynthesis across a vertical light gradient within 45-55-m-tall western hemlock (Tsuga heterophylla (Raf.) Sarg.) and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees growing in a 400-500-year-old mixed species stand. We determined: (1) whether light-saturated photosynthetic rates, light compensation points, and respiration rates varied from the upper to the lower canopy, and (2) if light-saturated photosynthetic rates, light compensation points, and respiration rates varied between Douglas-fir and western hemlock. Over a 25-m gradient from the canopy top to the lower canopy, mean light-saturated photosynthetic rates, light compensation points, and respiration rates declined in overstory Douglas-fir and western hemlock needles, paralleling a 65% decline in the mean daily photosynthetic photon flux density (PPFD). At the canopy top, increasing light-saturated photosynthetic rates relative to lower canopy needles increased carbon uptake at high PPFD. In the lower canopy, reduced respiration rates relative to upper canopy needles increased carbon uptake at low PPFD by reducing the light compensation point. At all canopy positions, western hemlock had lower mean light-saturated photosynthetic rates, light compensation points and respiration rates than Douglas-fir. As a result, western hemlock had higher net photosynthetic rates at low PPFD, but lower net photosynthetic rates at high PPFD compared with Douglas-fir.

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Section: Introductionmentioning

confidence: 66%

Vertical gradients in photosynthetic light response within an old-growth Douglas-fir and western hemlock canopy

et al. 2000

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“…leaves were determined at a range of irradiance levels and analysed using an empirical mathematical model (Marshall and Biscoe 1980; Kotvalt and Hák 1987) in the same way as in our previous papers (e.g. Marek et al 1989). This response of photosynthetic rate to I was described as a non‐rectangular hyperbola (Figs 1 and 2).…”

Section: Methodsmentioning

confidence: 99%

Photosynthesis, biomass partitioning and peroxisomicine A₁ production of Karwinskia species in response to nitrogen supply

Masarovičová

Welschen

Lee

et al. 2000

Physiologia Plantarum

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Species of the genus Karwinskia are medicinal woody plants producing secondary metabolites (anthracenones, peroxisomicine A1) with antitumour effects. We investigated the photosynthetic and growth characteristics of Karwinskia parvifolia Zucc. and Karwinskia humboldtiana Rose plants grown at two rates of nitrogen supply. There were significant differences in growth, CO2 exchange (photosynthesis, respiration), chlorophyll and nitrogen concentration between plants grown at high nitrogen supply (HN) and low nitrogen supply (LN). At HN, the plants of both species grew faster than those cultivated at LN. Rates of photosynthesis, leaf respiration and root respiration, quantum yield, the concentration of chlorophylls (a, b, a+b), specific leaf area, leaf mass ratio and peroxisomicine A1 concentration were higher in plants grown at HN. The species‐specific difference in the daily carbon budget was mainly due to variation in rates of carbon fixation. K. parvifolia responded more strongly to the nitrogen treatment than K. humboldtiana, in terms of growth, as well as with respect to photosynthesis and peroxisomicine A1 concentration.

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“…represent species with a contrasting distribution range in Europe and, thus, putatively differing in drought avoidance and tolerance strategies (Marigo et al, 2000;Bolte et al, 2007;Ellenberg and Leuschner, 2009). Except for beech, data on the drought response of the important Central European tree species is scarce (Aranda et al, 2005;Bréda et al, 2006;Cochard et al, 1996;Leuzinger et al, 2005;Magnani and Borguetti, 1995;Marek et al, 1989;Nardini and Salleo, 2000).…”

Section: Introductionmentioning

confidence: 99%

Leaf water status and stem xylem flux in relation to soil drought in five temperate broad-leaved tree species with contrasting water use strategies

et al. 2009

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. Leaf water status and stem xylem flux in relation to soil drought in five temperate broad-leaved tree species with contrasting water use strategies. Annals of Forest Science, Springer Verlag/EDP Sciences, 2009, 66 (1), pp.1. Ann. For. Sci. 66 (2009) Abstract• Five temperate broad-leaved tree species were compared with respect to their water consumption strategies under ample and restricted water supply. We measured synchronously leaf conductance (g L ) in the sun canopy, xylem sap flux (J s ) and leaf water potential (predawn, Ψ pd and noon, Ψ noon ) in adult trees in a mixed stand and related them to the fluctuations in vapor pressure deficit (D) and soil moisture.• Maximum g L was particularly high in F. excelsior, C. betulus and T. cordata and revealed a higher D sensitivity. Ψ pd remained constantly high in A. pseudoplatanus, C. betulus and F. excelsior, but decreased in T. cordata and F. sylvatica with decreasing soil moisture.• J sd decreased linearly with decreasing soil matrix potential in all species except for F. excelsior. Apparent hydraulic conductance in the soil-to-leaf flow path (L c ) was higher in A. pseudoplatanus than in the other species.• F. sylvatica maintained a low maximum g L and reduced J sd markedly upon drought, but faced severe decreases in Ψ pd and Ψ noon . F. excelsior represents an opposite strategy with high maximum g L and stable Ψ pd .• The species drought sensitivity increases in the sequence F. excelsior < C. betulus < T. cordata < A. pseudoplatanus < F. sylvatica. • J sd a diminué linéairement avec le potentiel matriciel du sol pour toutes les espèces excepté F. excelsior. La conductivité hydraulique apparente du trajet sol-feuille (L c ) était plus élevée chez A. pseudoplatanus que dans les autres espèces. Mots-clés• F. sylvatica a maintenu une faible g L maximum et a réduit sensiblement J sd face à la sécheresse, mais a connu de graves diminutions de Ψ pd et Ψ noon . F. excelsior présentait une stratégie opposée avec une g L maximum élevée et un Ψ pd stable.• La sensibilité des espèces à la sécheresse augmente selon la séquence F. excelsior < C. betulus < T. cordata < A. pseudoplatanus < F. sylvatica.

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Stand microclimate and physiological activity of tree leaves in an oak-hornbeam forest

Cited by 16 publications

References 23 publications

Vertical gradients in photosynthetic light response within an old-growth Douglas-fir and western hemlock canopy

Vertical gradients in photosynthetic light response within an old-growth Douglas-fir and western hemlock canopy

Photosynthesis, biomass partitioning and peroxisomicine A₁ production of Karwinskia species in response to nitrogen supply

Leaf water status and stem xylem flux in relation to soil drought in five temperate broad-leaved tree species with contrasting water use strategies

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Stand microclimate and physiological activity of tree leaves in an oak-hornbeam forest

Cited by 16 publications

References 23 publications

Vertical gradients in photosynthetic light response within an old-growth Douglas-fir and western hemlock canopy

Vertical gradients in photosynthetic light response within an old-growth Douglas-fir and western hemlock canopy

Photosynthesis, biomass partitioning and peroxisomicine A1 production of Karwinskia species in response to nitrogen supply

Leaf water status and stem xylem flux in relation to soil drought in five temperate broad-leaved tree species with contrasting water use strategies

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Photosynthesis, biomass partitioning and peroxisomicine A₁ production of Karwinskia species in response to nitrogen supply