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Diurnal dynamics of photosynthetic parameters of Norway spruce trees cultivated under ambient and elevated CO2: the reasons of midday depression in CO2 assimilation

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Diurnal dynamics of photosynthetic parameters of Norway spruce trees cultivated under ambient and elevated CO2 : the reasons of midday depression in CO2 assimilation. / Spunda, V.; Kalina, J.; Urban, O.; Luis, V. C.; Sibisse, I.; Puertolas Simon, Jaime; Sprtova, M.; Marek, M. V.

In: Plant Science, Vol. 168, No. 5, 05.2005, p. 1371-1381.

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Spunda, V. ; Kalina, J. ; Urban, O. ; Luis, V. C. ; Sibisse, I. ; Puertolas Simon, Jaime ; Sprtova, M. ; Marek, M. V. / Diurnal dynamics of photosynthetic parameters of Norway spruce trees cultivated under ambient and elevated CO2 : the reasons of midday depression in CO2 assimilation. In: Plant Science. 2005 ; Vol. 168, No. 5. pp. 1371-1381.

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@article{c077456159c14812b0fb9bef3f1ce28d,
title = "Diurnal dynamics of photosynthetic parameters of Norway spruce trees cultivated under ambient and elevated CO2: the reasons of midday depression in CO2 assimilation",
abstract = "Diurnal courses of net CO2 assimilation, non-assimilatory processes, electron transport rate, photosystem (PS) II photochemical efficiency, and pigment composition were investigated during summer days for sun exposed needles of Norway spruce trees grown under ambient (AC) and/or elevated (EC; 700 mu mol (CO2) mol(-1)) atmospheric carbon dioxide concentration ([CO2]). Daily courses of net CO2 assimilation (AN c,) documented significantly higher values for trees cultivated under EC conditions at irradiances above 250 mu mol m(-2) s(-1). In comparison with the AC variant, EC treatment led to the diminution of midday photosynthesis depression that was predominantly caused by stomatal closure and subsequent decrease of intercellular [CO2] (Ci). A partial recovery of assimilation ability of AC shoots correlated with the partial restoration of stomatal conductivity during the afternoon hours. On the contrary, maximum depression of light-saturated assimilation rate (A(Nmax)), permanent decrease of assimilation capacity (A(Nsat)) over the day and an atypical daily course of gross photosynthesis (P-act) suggested an increased contribution of non-stomatal processes in a down-regulation of carboxylation efficiency in EC shoots during the noon and afternoon hours. The relatively high potential quantum yield of PS II photochemistry (F-V/F-M >= 0.8), estimated on both AC and EC dark adapted needles throughout the day, confirmed that PS II photoinhibition was not the primary reason of the midday depression of photosynthesis. However, the feedback effects of enhanced down-regulation of photosynthesis under EC induced: (a) slight inactivation of PS II and reduction of PS II electron transport rates, (b) enhanced demand on xanthophyll dependent non-radiative dissipation of excess light energy (accumulation of deepoxidized antheraxanthin and zeaxanthin), (c) adjustment of the light harvesting complexes (increase of chlorophyll a/b ratio). (c) 2005 Elsevier Ireland Ltd. All rights reserved.",
keywords = "elevated CO2, PHOTORESPIRATION, WHOLE-PLANT LEVEL, xanthophyll cycle activity, dynamics of acclimation depression of photosynthesis, XANTHOPHYLL CYCLE, daily course of photosynthesis, CHLOROPHYLL FLUORESCENCE, RETAINED ZEAXANTHIN, stomatal and non-stomatal limitation, photochemical efficiency of photosystem II, GAS-EXCHANGE, ACCLIMATION, LONG-TERM EXPOSURE, LEAVES, DIFFERENT RESPONSES",
author = "V. Spunda and J. Kalina and O. Urban and Luis, {V. C.} and I. Sibisse and {Puertolas Simon}, Jaime and M. Sprtova and Marek, {M. V.}",
year = "2005",
month = may
doi = "10.1016/j.plantsci.2005.02.002",
language = "English",
volume = "168",
pages = "1371--1381",
journal = "Plant Science",
issn = "0168-9452",
publisher = "Elsevier Ireland Ltd",
number = "5",

}

RIS

TY - JOUR

T1 - Diurnal dynamics of photosynthetic parameters of Norway spruce trees cultivated under ambient and elevated CO2

T2 - the reasons of midday depression in CO2 assimilation

AU - Spunda, V.

AU - Kalina, J.

AU - Urban, O.

AU - Luis, V. C.

AU - Sibisse, I.

AU - Puertolas Simon, Jaime

AU - Sprtova, M.

AU - Marek, M. V.

PY - 2005/5

Y1 - 2005/5

N2 - Diurnal courses of net CO2 assimilation, non-assimilatory processes, electron transport rate, photosystem (PS) II photochemical efficiency, and pigment composition were investigated during summer days for sun exposed needles of Norway spruce trees grown under ambient (AC) and/or elevated (EC; 700 mu mol (CO2) mol(-1)) atmospheric carbon dioxide concentration ([CO2]). Daily courses of net CO2 assimilation (AN c,) documented significantly higher values for trees cultivated under EC conditions at irradiances above 250 mu mol m(-2) s(-1). In comparison with the AC variant, EC treatment led to the diminution of midday photosynthesis depression that was predominantly caused by stomatal closure and subsequent decrease of intercellular [CO2] (Ci). A partial recovery of assimilation ability of AC shoots correlated with the partial restoration of stomatal conductivity during the afternoon hours. On the contrary, maximum depression of light-saturated assimilation rate (A(Nmax)), permanent decrease of assimilation capacity (A(Nsat)) over the day and an atypical daily course of gross photosynthesis (P-act) suggested an increased contribution of non-stomatal processes in a down-regulation of carboxylation efficiency in EC shoots during the noon and afternoon hours. The relatively high potential quantum yield of PS II photochemistry (F-V/F-M >= 0.8), estimated on both AC and EC dark adapted needles throughout the day, confirmed that PS II photoinhibition was not the primary reason of the midday depression of photosynthesis. However, the feedback effects of enhanced down-regulation of photosynthesis under EC induced: (a) slight inactivation of PS II and reduction of PS II electron transport rates, (b) enhanced demand on xanthophyll dependent non-radiative dissipation of excess light energy (accumulation of deepoxidized antheraxanthin and zeaxanthin), (c) adjustment of the light harvesting complexes (increase of chlorophyll a/b ratio). (c) 2005 Elsevier Ireland Ltd. All rights reserved.

AB - Diurnal courses of net CO2 assimilation, non-assimilatory processes, electron transport rate, photosystem (PS) II photochemical efficiency, and pigment composition were investigated during summer days for sun exposed needles of Norway spruce trees grown under ambient (AC) and/or elevated (EC; 700 mu mol (CO2) mol(-1)) atmospheric carbon dioxide concentration ([CO2]). Daily courses of net CO2 assimilation (AN c,) documented significantly higher values for trees cultivated under EC conditions at irradiances above 250 mu mol m(-2) s(-1). In comparison with the AC variant, EC treatment led to the diminution of midday photosynthesis depression that was predominantly caused by stomatal closure and subsequent decrease of intercellular [CO2] (Ci). A partial recovery of assimilation ability of AC shoots correlated with the partial restoration of stomatal conductivity during the afternoon hours. On the contrary, maximum depression of light-saturated assimilation rate (A(Nmax)), permanent decrease of assimilation capacity (A(Nsat)) over the day and an atypical daily course of gross photosynthesis (P-act) suggested an increased contribution of non-stomatal processes in a down-regulation of carboxylation efficiency in EC shoots during the noon and afternoon hours. The relatively high potential quantum yield of PS II photochemistry (F-V/F-M >= 0.8), estimated on both AC and EC dark adapted needles throughout the day, confirmed that PS II photoinhibition was not the primary reason of the midday depression of photosynthesis. However, the feedback effects of enhanced down-regulation of photosynthesis under EC induced: (a) slight inactivation of PS II and reduction of PS II electron transport rates, (b) enhanced demand on xanthophyll dependent non-radiative dissipation of excess light energy (accumulation of deepoxidized antheraxanthin and zeaxanthin), (c) adjustment of the light harvesting complexes (increase of chlorophyll a/b ratio). (c) 2005 Elsevier Ireland Ltd. All rights reserved.

KW - elevated CO2

KW - PHOTORESPIRATION

KW - WHOLE-PLANT LEVEL

KW - xanthophyll cycle activity

KW - dynamics of acclimation depression of photosynthesis

KW - XANTHOPHYLL CYCLE

KW - daily course of photosynthesis

KW - CHLOROPHYLL FLUORESCENCE

KW - RETAINED ZEAXANTHIN

KW - stomatal and non-stomatal limitation

KW - photochemical efficiency of photosystem II

KW - GAS-EXCHANGE

KW - ACCLIMATION

KW - LONG-TERM EXPOSURE

KW - LEAVES

KW - DIFFERENT RESPONSES

U2 - 10.1016/j.plantsci.2005.02.002

DO - 10.1016/j.plantsci.2005.02.002

M3 - Journal article

VL - 168

SP - 1371

EP - 1381

JO - Plant Science

JF - Plant Science

SN - 0168-9452

IS - 5

ER -