Acclimation of Norway spruce photosynthetic apparatus to the combined effect of high irradiance and temperature

Štroch, Michal; Vrábl, Daniel; Podolinská, Jana; Kalina, J.; Urban, Otmar; Špunda, Vladimı́r

doi:10.1016/j.jplph.2009.11.011

Cited by 9 publications

(8 citation statements)

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“…It is likely that efficient heat dissipation of absorbed light energy was sufficient under the given environmental conditions to protect spruce needles against photo‐inhibitory damage (Spunda et al. 2005; Stroch et al. 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Rapid degradation of D1 protein, decreased rate of plastoquinone reduction and increased inactivation of PSII reaction centres have already been identified as possible reasons for the decline in electron transport on sunny days as the afternoon progresses ). It is likely that efficient heat dissipation of absorbed light energy was sufficient under the given environmental conditions to protect spruce needles against photo-inhibitory damage (Spunda et al 2005;Stroch et al 2010). 3.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, it is hypothesized that an excessive flux of direct radiation and exposure to high tissue temperatures during hot sunny days may lead to significant down‐regulation of photosynthesis, evident as stomatal closure, photo‐inhibition of photo‐chemical reactions and/or stimulation of photorespiratory CO 2 efflux (Muraoka et al. 2000; Larcher 2003; Franco, Matsubara & Orthen 2007; Stroch et al. 2010).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it is hypothesized that an excessive flux of direct radiation and exposure to high tissue temperatures during hot sunny days may lead to significant down-regulation of photosynthesis, evident as stomatal closure, photo-inhibition of photo-chemical reactions and ⁄ or stimulation of photorespiratory CO 2 efflux (Muraoka et al 2000;Larcher 2003;Franco, Matsubara & Orthen 2007;Stroch et al 2010). Within this hypothesis, down-regulation of carbon assimilation is expected in the upper-sunlit leaves during hot sunny days with a shift in the main assimilation activity to the lower parts of the canopy.…”

Section: Introductionmentioning

confidence: 99%

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Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO₂ uptake within a spruce canopy

et al. 2011

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Summary1. Cloud cover affects carbon exchange between biota and the atmosphere. Recent studies have demonstrated that an increase in the diffuse radiation fraction enhances the photosynthetic efficiency of canopies. Although the exact mechanism behind this effect is not clear, a more even distribution of light among leaves across the vertical profile of the canopy is considered to be the most important cause of this difference. 2. To test this hypothesis, the net ecosystem production (NEP) of a Norway spruce forest (30-year-old) was measured under cloudy and sunny skies by the eddy covariance method. In parallel, measurements of the diurnal courses of gas exchange and chlorophyll fluorescence parameters were made in the upper sun (5th whorl; 1-year-old needles), middle (8th and 10th whorl; 1-and 2-year-old needles) and lower shade (15th whorl; >2-year-old needles) shoots. 3. The higher diffuse radiation fraction during cloudy days resulted in significantly higher ecosystem carbon uptake than at corresponding incident photosynthetic photon flux density on sunny days. Our shoot-level data show that shoots from deep within the canopy contribute substantially to the overall carbon balance during cloudy days. But, although shade-adapted shoots had a markedly positive carbon balance over a 24-h period on cloudy days, their performance was impaired on sunny days contributing only a marginal or even negative carbon balance from the middle and shaded parts of the canopy. The uppermost sun shoots contributed 78% of the total carbon assimilated during a sunny day, but only 43% during a cloudy day. 4. In addition, afternoon depression of canopy NEP and CO 2 assimilation rates of the uppermost shoots (5th and 8th whorl) occurred in response to irradiance on sunny days, characterized by significant decreases in CO 2 uptake and apparent quantum yield; however, this depression did not occur under cloudy conditions. Stomatal and non-stomatal regulations of carbon assimilation in the afternoon are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO₂ uptake within a spruce canopy

et al. 2011

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“…This result shows that, during the final days of the treatment, acclimation to high irradiance might have alleviated the effect of high irradiance on Fv/Fm at temperatures below 32 °C. In contrast, at temperatures above 32 °C, temperature mediated photoinhibition might have been occurred [39,40]. In general, the decrease in Fv/Fm occurs as a result of the inactivation of PSII photochemistry and/or the increase in thermal energy dissipation from PSII associated chlorophyll antennae [28].…”

Section: Maximum Photochemical Efficiency Of Psii (Fv/fm) Electron Tmentioning

confidence: 99%

Using the quantum yields of photosystem II and the rate of net photosynthesis to monitor high irradiance and temperature stress in chrysanthemum (Dendranthema grandiflora)

Janka

Körner²,

Rosenqvist

et al. 2015

Plant Physiology and Biochemistry

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Physiological response of irrigated and non-irrigated Norway spruce trees as a consequence of drought in field conditions

et al. 2012

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Acclimation of Norway spruce photosynthetic apparatus to the combined effect of high irradiance and temperature

Cited by 9 publications

References 48 publications

Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO₂ uptake within a spruce canopy

Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO₂ uptake within a spruce canopy

Using the quantum yields of photosystem II and the rate of net photosynthesis to monitor high irradiance and temperature stress in chrysanthemum (Dendranthema grandiflora)

Physiological response of irrigated and non-irrigated Norway spruce trees as a consequence of drought in field conditions

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Acclimation of Norway spruce photosynthetic apparatus to the combined effect of high irradiance and temperature

Cited by 9 publications

References 48 publications

Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO2 uptake within a spruce canopy

Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO2 uptake within a spruce canopy

Using the quantum yields of photosystem II and the rate of net photosynthesis to monitor high irradiance and temperature stress in chrysanthemum (Dendranthema grandiflora)

Physiological response of irrigated and non-irrigated Norway spruce trees as a consequence of drought in field conditions

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Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO₂ uptake within a spruce canopy

Impact of clear and cloudy sky conditions on the vertical distribution of photosynthetic CO₂ uptake within a spruce canopy