Acclimation of photosynthesis in Norway spruce and red oak grown in open-top chambers and subjected to natural drought and to elevated CO<sub>2</sub>

Thiec, Didier Le; Dixon, Martin

doi:10.1139/x26-009

Cited by 19 publications

(9 citation statements)

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“…Increased WUE in response to CO 2 elevations has been reported for many species of well-watered plants [7] including young trees, such as Pinus bankciana and Betula papyrifera [8,14], Picea abies and Picea mariana (Mill.) BSP [31,33,43,44].…”

Section: Discussionmentioning

confidence: 99%

Genetic Variation of Ecophysiological Responses to CO2 in Picea glauca Seedlings

Dang¹,

Maepea²,

Parker³

2008

TOFSCIJ

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Abstract:To investigate genetic variation in the response of white spruce (Picea glauca (Moench) Voss) to CO 2 elevations, one-year-old seedlings of 11 provenances from Ontario were grown at 360, 530 and 700 mol mol . There were no significant between-provenance differences in any of the above responses; nevertheless, the ecophysiological performance of seedlings was closely correlated with the temperature and precipitation regimes of the seed origin. In addition, provenance significantly affected seedling total biomass, shoot mass, shoot/root ratio and height growth.

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Section: Discussionmentioning

confidence: 99%

Genetic Variation of Ecophysiological Responses to CO2 in Picea glauca Seedlings

Dang¹,

Maepea²,

Parker³

2008

TOFSCIJ

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“…under ambient CO # . At pre-dawn foliage water potentials k1n0 MPa, A of 6-yr-old northern red oak was responsive to change in foliage water status (Le Thiec & Dixon, 1996).…”

Section: Water Regime and Co # Effectsmentioning

confidence: 94%

Ontogeny affects response of northern red oak seedlings to elevated CO₂ and water stress: I. Carbon assimilation and biomass production

Anderson

Tomlinson

1998

New Phytologist

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The interactive influences of elevated carbon dioxide, water stress, and ontogeny on carbon assimilation and biomass production were investigated in northern red oak, a species having episodic shoot growth characteristics. Seedlings were grown from acorns through three shoot-growth flushes (8-11 wk) in controlled-environment chambers at 400, 530 or 700 µmol mol −" CO # and under well watered or water-stressed soil-moisture regimes. Increasing CO # growth concentration from 400 to 700 µmol mol −" resulted in a 34 % increase in net assimilation rate (A), a 31 % decrease in stomatal conductance to water vapour (g s ) and a 141 % increase in water use efficiency (WUE) in well watered seedlings. In contrast, water-stressed seedlings grown at 700 µmol mol −" CO # demonstrated a 69 % increase in A, a 23 % decrease in g s , and a 104 % increase in WUE. However, physiological responses to increased CO # and water stress were strongly modified by ontogeny. During active third-flush shoot growth, A in first-flush and second-flush foliage of water-stressed seedlings increased relative to the quiescent phase following cessation of second-flush growth by an average of 115 % ; g s increased by an average of 74 %. In contrast, neither A nor g s in comparable foliage of well watered seedlings changed in response to active third-flush growth. Whereas seedling growth was continuous through three flushes in well watered seedlings, growth of water-stressed seedlings was minimal following the leaf-expansion stage of the third flush. Through three growth flushes total seedling biomass and biomass allocation to root, shoot and foliage components were very similar in water-stressed seedlings grown at 700 µmol mol −" CO # and well watered seedlings grown at 400 µmol mol −" CO # . Enhancement effects of elevated CO # on seedling carbon (C) assimilation and biomass production may offset the negative impact of moderate water stress and are likely to be determined by ontogeny and stress impacts on carbon sink demand.

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“…This is because all global change associated modifications in environment occur at the background of CO 2 elevation, and typically, elevated CO 2 increases the non-structural carbon storage (Wullschleger et al, 1992;Roberntz and Stockfors, 1998;Tognetti et al, 1998;Vu et al, 2002), and enhances the resistance to several stresses. Plants grown in elevated CO 2 atmospheres have been shown to be less vulnerable to drought (Conroy et al, 1986;Le Thiec and Dixon, 1996;Roden and Ball, 1996;Anderson and Tomlinson, 1998;Tomlinson and Anderson, 1998;Schwanz and Polle, 2001;Polley et al, 2002;Vu et al, 2002), maintaining higher growth rate under drought than plants under lower CO 2 atmospheres (Tschaplinski et al, 1995;Polley et al, 2002). Elevated CO 2 also enhances plant resistance to heat and frost stresses (Faria et al, 1996;Wayne et al, 1998;Taub et al, 2000;Vu et al, 2002;Darbah et al, 2010), likely reflecting greater concentrations of membrane-stabilizing sugars in the tissues (for sugar effects on heat stability of photosynthetic apparatus see Hüve et al, 2006) (for sugar effects on frost stability see Rütten and Santarius, 1988;Santarius, 1990).…”

Section: Tolerance Of Single and Multiple Limitationsmentioning

confidence: 99%

Responses of forest trees to single and multiple environmental stresses from seedlings to mature plants: Past stress history, stress interactions, tolerance and acclimation

Niinemets

2010

Forest Ecology and Management

616

467

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a b s t r a c tForest trees are exposed to a myriad of single and combined stresses with varying strength and duration throughout their lifetime, and many of the simultaneous and successive stress factors strongly interact. While much progress has been achieved in understanding the effects of single stresses on tree performance, multiple interacting stress effects cannot be adequately assessed from combination of single factor analyses. In particular, global change brings about novel combinations of severity and timing of different stresses, the effects of which on tree performance are currently hard to predict. Furthermore, the combinations of stresses commonly sustained by trees change during tree ontogeny. In addition, tree photosynthesis and growth rates decline with increasing tree age and size, while support biomass in roots, stem and branches accumulates and the concentrations of non-structural carbohydrates increase, collectively resulting in an enhancement of non-structural carbon pools. In this review, tree physiological responses to key environmental stress factors and their combinations are analyzed from seedlings to mature trees. The key conclusions of this analysis are that combined stresses can influence survival of large trees even more than chronic exposure to a single predictable stress such as drought. In addition, tree tolerance to many environmental stresses increases throughout the ontogeny as the result of accumulation of non-structural carbon pools, implying major change in sensing, response and acclimation to single and multiple stresses in trees of different size and age.

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Acclimation of photosynthesis in Norway spruce and red oak grown in open-top chambers and subjected to natural drought and to elevated CO₂

Cited by 19 publications

References 0 publications

Genetic Variation of Ecophysiological Responses to CO2 in Picea glauca Seedlings

Genetic Variation of Ecophysiological Responses to CO2 in Picea glauca Seedlings

Ontogeny affects response of northern red oak seedlings to elevated CO₂ and water stress: I. Carbon assimilation and biomass production

Responses of forest trees to single and multiple environmental stresses from seedlings to mature plants: Past stress history, stress interactions, tolerance and acclimation

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Acclimation of photosynthesis in Norway spruce and red oak grown in open-top chambers and subjected to natural drought and to elevated CO2

Cited by 19 publications

References 0 publications

Genetic Variation of Ecophysiological Responses to CO2 in Picea glauca Seedlings

Genetic Variation of Ecophysiological Responses to CO2 in Picea glauca Seedlings

Ontogeny affects response of northern red oak seedlings to elevated CO2 and water stress: I. Carbon assimilation and biomass production

Responses of forest trees to single and multiple environmental stresses from seedlings to mature plants: Past stress history, stress interactions, tolerance and acclimation

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Acclimation of photosynthesis in Norway spruce and red oak grown in open-top chambers and subjected to natural drought and to elevated CO₂

Ontogeny affects response of northern red oak seedlings to elevated CO₂ and water stress: I. Carbon assimilation and biomass production