Photosynthesis, Respiration, and Growth of Plants in the Soviet Arctic

Semikhatova, O. A.; Gerasimenko, Tatiana V.; Иванова, Т. И.

doi:10.1016/b978-0-12-168250-7.50014-6

Cited by 65 publications

(43 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Differences in the rate of R at standard measurement temperatures are also commonly exhibited by plants that grew and developed under contrasting temperature regimes (either in the laboratory or in the field) (e.g. Figs 1, 3; Billings and Mooney 1968;Chabot and Billings 1972;Körner and Larcher 1988;Collier and Cummins 1990;Semikhatova et al 1992;Collier 1996;Goldstein et al 1996;Arnone and Körner 1997;Zha et al 2002). In some cases, acclimation is associated with a change in the rate of R primarily at moderate to high measuring temperatures, with little or no change in R at low measuring temperatures (i.e.…”

Section: Overviewmentioning

confidence: 99%

The hot and the cold: unravelling the variable response of plant respiration to temperature

Atkin¹,

Bruhn

Hurry

et al. 2005

Functional Plant Biol.

441

410

View full text Add to dashboard Cite

This paper is part of The Evans Review series, named for Dr Lloyd Evans. The series contains reviews that are critical,state-of-the-art evaluations that aim to advance our understanding, rather than being exhaustive compilations of information, and are written by invitation.Abstract. When predicting the effects of climate change, global carbon circulation models that include a positive feedback effect of climate warming on the carbon cycle often assume that (1) plant respiration increases exponentially with temperature (with a constant Q 10 ) and (2) that there is no acclimation of respiration to long-term changes in temperature. In this review, we show that these two assumptions are incorrect. While Q 10 does not respond systematically to elevated atmospheric CO 2 concentrations, other factors such as temperature, light, and water availability all have the potential to influence the temperature sensitivity of respiratory CO 2 efflux. Roots and leaves can also differ in their Q 10 values, as can upper and lower canopy leaves. The consequences of such variable Q 10 values need to be fully explored in carbon modelling. Here, we consider the extent of variability in the degree of thermal acclimation of respiration, and discuss in detail the biochemical mechanisms underpinning this variability; the response of respiration to long-term changes in temperature is highly dependent on the effect of temperature on plant development, and on interactive effects of temperature and other abiotic factors (e.g. irradiance, drought and nutrient availability). Rather than acclimating to the daily mean temperature, recent studies suggest that other components of the daily temperature regime can be important (e.g. daily minimum and / or night temperature).In some cases, acclimation may simply reflect a passive response to changes in respiratory substrate availability, whereas in others acclimation may be critical in helping plants grow and survive at contrasting temperatures. We also consider the impact of acclimation on the balance between respiration and photosynthesis; although environmental factors such as water availability can alter the balance between these two processes, the available data suggests that temperature-mediated differences in dark leaf respiration are closely linked to concomitant differences in leaf photosynthesis. We conclude by highlighting the need for a greater process-based understanding of thermal acclimation of respiration if we are to successfully predict future ecosystem CO 2 fluxes and potential feedbacks on atmospheric CO 2 concentrations.

show abstract

Section: Overviewmentioning

confidence: 99%

The hot and the cold: unravelling the variable response of plant respiration to temperature

Atkin¹,

Bruhn

Hurry

et al. 2005

Functional Plant Biol.

441

410

View full text Add to dashboard Cite

show abstract

“…ER is comprised of both heterotrophic soil respiration and autotrophic dark respiration resulting from plant growth and tissue maintenance [Oechel and Billings, 1992 [Billings et al, 1983;Peterson et al, 1984;Oechel et al, 1993Oechel et al, , 1995. Plant and root respiration, which may account for 30 to 70% of ER in arctic ecosystems [Semikhatova et al, 1992; Silvola et al, 1996; Bhardwaj, 1997] is affected by environmental factors such as temperature but is more strongly related to the growth stage of the plant [Semikhatova et al, 1992]. Bubier et al [1998] have shown that ER accounts for 33% of GEP under high light conditions and that this relationship varies seasonally as soil moisture, surface temperature, and plant phenology change.…”

Section: Introductionmentioning

confidence: 99%

Interannual variability of net ecosystem CO₂ exchange at a subarctic fen

Griffis

Rouse

Waddington

2000

Global Biogeochemical Cycles

126

View full text Add to dashboard Cite

Abstract. Landscape-scale net ecosystem CO2 exchange (NEE) and the energy balance of a subarctic fen were studied during five growing seasons near Churchill, Manitoba. Interannual variability in NEE was large and ranged from a net sink of-23 5 g CO2 m '2 in 1996 to a net source of +76 g CO2 m '2 in 1994. Annual estimates of CO2 exchange indicate that during the present period the fen is losing carbon nearly 3 times faster than its long-term historical gain of about -11 g CO2 m '2 yr -•. Our estimates suggest that gross ecosystem photosynthesis may be more variable than ecosystem respiration on diurnal, seasonal, and interannual timescales. Our data strongly indicate that an early snowmelt combined with wet and warm conditions during the spring period lead to large carbon acquisition even when drier conditions were experienced over the majority of the growing season. The phenological stage of the vegetation relative to the climatic conditions experienced is an important cause of the interannual variability in NEE. An accurate representation of phenology in climate models is, therefore, critical to the success of forecasting the carbon budgets of northern wetlands.

show abstract

“…Variation in leaf nitrogen content and drought (Wilson et al, 2000) have been identified as the main drivers of seasonal changes in photosynthetic parameters in deciduous trees but the role of temperature has been frequently overlooked. With regard to respiration, Arctic plants show a marked seasonal pattern, with maximum rates occurring at the beginning of the growing season, coinciding with leaf expansion and shoot extension (Semikhatova et al, 1996). This has also been observed for boreal evergreen conifers (Hollinger et al, 1999 andRayment et al, 2002).…”

Section: Introductionmentioning

confidence: 83%

Seasonal controls on net branch CO2 assimilation in sub-Arctic Mountain Birch (Betula pubescens ssp. czerepanovii (Orlova) Hamet-Ahti)

Poyatos¹,

Gornall²,

Mencuccini³

et al. 2012

Agricultural and Forest Meteorology

View full text Add to dashboard Cite

Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Agricultural and Forest Meteorology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Agricultural and Forest Meteorology, 158-159, 2012, 10.1016/j.agrformet.2012.009. Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Keywords:Arctic; Branch bags; Light response curve; Phenology; Photosynthesis; Respiration; State of acclimation. Highlights:We measured growing season branch-level CO 2 fluxes in sub-Arctic Mountain Birch. Photosynthetic parameters dynamically acclimated to temperature within 5-7 days. Whole-branch respiration was higher during shoot growth and leaf expansion. Cumulative CO 2 fluxes averaged 640 g CO 2 m −2 across the two measured sites. Abstract:Forests at northern high latitudes are experiencing climate-induced changes in growth and productivity, but our knowledge on the underlying mechanisms driving seasonal CO 2 fluxes in northern boreal trees comes almost exclusively from ecosystem-level studies on evergreen conifers. In this study, we measured growing season whole-branch CO 2 exchange in a deciduous tree species of the tundra-taiga ecotone, Mountain Birch (Betula pubescens ssp. czerepanovii (Orlova) HametAhti), at two locations in northern Fennoscandia: Abisko (Sweden) and Kevo (Finland). We identified strong seasonal and environmental controls on both photosynthesis and respiration by analysing the parameters of light response curves. Branch-level photosynthetic parameters showed a delayed response to temperature, and, at Kevo, they were well described by sigmoid functions of the state of acclimation (S). Temperature acclimation was slower (time constant, τ = 7 days) for maximum photosynthesis (βbr) than for quantum efficiency (αbr) (τ = 5 days). High temperature-independent values of the respiration parameter (γbr) during leaf and shoot expansion were consistent with associated higher growth respiration rates. The ratio γbr/βbr was positively related to temperature, a result consistent with substrate-induced variations in leaf respiration rates at the branch level. Differences in stand structure and within-site variation in the active period of C uptake determined the spatiotemporal patterns in net assimilation amongst branc...

show abstract

Photosynthesis, Respiration, and Growth of Plants in the Soviet Arctic

Cited by 65 publications

References 10 publications

The hot and the cold: unravelling the variable response of plant respiration to temperature

The hot and the cold: unravelling the variable response of plant respiration to temperature

Interannual variability of net ecosystem CO₂ exchange at a subarctic fen

Seasonal controls on net branch CO2 assimilation in sub-Arctic Mountain Birch (Betula pubescens ssp. czerepanovii (Orlova) Hamet-Ahti)

Contact Info

Product

Resources

About

Photosynthesis, Respiration, and Growth of Plants in the Soviet Arctic

Cited by 65 publications

References 10 publications

The hot and the cold: unravelling the variable response of plant respiration to temperature

The hot and the cold: unravelling the variable response of plant respiration to temperature

Interannual variability of net ecosystem CO2 exchange at a subarctic fen

Seasonal controls on net branch CO2 assimilation in sub-Arctic Mountain Birch (Betula pubescens ssp. czerepanovii (Orlova) Hamet-Ahti)

Contact Info

Product

Resources

About

Interannual variability of net ecosystem CO₂ exchange at a subarctic fen