Intensita fotosynthesy a obsah chlorofylu u různě starých listůNicotiana sanderae hort

Šesták, Z.; Čatský, J.

doi:10.1007/bf02932934

Cited by 42 publications

(8 citation statements)

References 26 publications

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“…; van Amerongen & Croce ). The age‐dependent pattern in chlorophyll content exhibited here was also registered in several plant species, such as Nicotiana sanderae (Šesták & Čatský ) and Cupressus semperviren (la Porta et al . ).…”

Section: Discussionsupporting

confidence: 76%

“…). This pattern is also associated with CO 2 assimilation rates (Šesták & Čatský ; Babani & Lichtenthaler ; la Porta et al . ).…”

Section: Discussionmentioning

confidence: 57%

“…), Hill reaction activity (Kutík et al . ) and CO 2 assimilation parameters (Šesták & Čatský ; Oquist et al . ; la Porta et al .…”

Section: Discussionmentioning

confidence: 99%

“…A combination between more efficient pNPQ formation and ETR should have ensured Arabidopsis plants at the reproductive phase have a better ability to cope with high light than the juvenile and senescent phases. However, care is needed when using the ETR parameter to compare plants at different ontogenetic phases, as variations in the leaf thickness and chlorophyll content are common (Avery ; Šesták & Čatský ; Babani & Lichtenthaler ; la Porta et al . ; Liu et al .…”

Section: Discussionmentioning

confidence: 99%

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Quantifying the dynamics of light tolerance inArabidopsisplants during ontogenesis

Carvalho

Ware

Ruban

2015

Plant Cell & Environment

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The amount of light plants can tolerate during different phases of ontogenesis remains largely unknown. This was addressed here employing a novel methodology that uses the coefficient of photochemical quenching (qP) to assess the intactness of photosystem II reaction centres. Fluorescence quenching coefficients, total chlorophyll content and concentration of anthocyanins were determined weekly during the juvenile, adult, reproductive and senescent phases of plant ontogenesis. This enabled quantification of the protective effectiveness of non-photochemical fluorescence quenching (NPQ) and determination of light tolerance. The light intensity that caused photoinhibition in 50% of leaf population increased from ∼70 μmol m(-2) s(-1) , for 1-week-old seedlings, to a maximum of 1385 μmol m(-2) s(-1) for 8-week-old plants. After 8 weeks, the tolerated light intensity started to gradually decline, becoming only 332 μmol m(-2) s(-1) for 13-week-old plants. The dependency of light tolerance on plant age was well-related to the amplitude of protective NPQ (pNPQ) and the electron transport rates (ETRs). Light tolerance did not, however, show a similar trend to chlorophyll a/b ratios and content of anthocyanins. Our data suggest that pNPQ is crucial in defining the capability of high light tolerance by Arabidopsis plants during ontogenesis.

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Section: Discussionsupporting

confidence: 76%

“…). This pattern is also associated with CO 2 assimilation rates (Šesták & Čatský ; Babani & Lichtenthaler ; la Porta et al . ).…”

Section: Discussionmentioning

confidence: 57%

“…), Hill reaction activity (Kutík et al . ) and CO 2 assimilation parameters (Šesták & Čatský ; Oquist et al . ; la Porta et al .…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Quantifying the dynamics of light tolerance inArabidopsisplants during ontogenesis

Carvalho

Ware

Ruban

2015

Plant Cell & Environment

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“…The C ab parameter was introduced in ORCHIDEE as PFT dependent, and a prior value of 40 μg.cm −2 was set for all vegetation types (Table 3). In addition, we also account for temporal variations of C ab with leaf age in the same way the control of leaf age on the maximum carboxylation capacity is already implemented in ORCHIDEE (see Krinner et al, ; Santaren et al, ), a covariation of these traits having been documented by Niinemets et al (), Muraoka and Koizumi (), and Šesták and Čatský ().…”

Section: Modeling Sif In Orchideementioning

confidence: 99%

Improving Estimates of Gross Primary Productivity by Assimilating Solar‐Induced Fluorescence Satellite Retrievals in a Terrestrial Biosphere Model Using a Process‐Based SIF Model

et al. 2019

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Over the last few years, solar-induced chlorophyll fluorescence (SIF) observations from space have emerged as a promising resource for evaluating the spatio-temporal distribution of gross primary productivity (GPP) simulated by global terrestrial biosphere models. SIF can be used to improve GPP simulations by optimizing critical model parameters through statistical Bayesian data assimilation techniques. A prerequisite is the availability of a functional link between GPP and SIF in terrestrial biosphere models. Here we present the development of a mechanistic SIF observation operator in the ORCHIDEE (Organizing Carbon and Hydrology In Dynamic Ecosystems) terrestrial biosphere model. It simulates the regulation of photosystem II fluorescence quantum yield at the leaf level thanks to a novel parameterization of non-photochemical quenching as a function of temperature, photosynthetically active radiation, and normalized quantum yield of photochemistry. It emulates the radiative transfer of chlorophyll fluorescence to the top of the canopy using a parametric simplification of the SCOPE (Soil Canopy Observation Photosynthesis Energy) model. We assimilate two years of monthly OCO-2 (Orbiting Carbon Observatory-2) SIF product at 0.5°(2015-2016) to optimize ORCHIDEE photosynthesis and phenological parameters over an ensemble of grid points for all plant functional types. The impact on the simulated GPP is considerable with a large decrease of the global scale budget by 28 GtC/year over the period 1990-2009. The optimized GPP budget (134/136 GtC/year over ) remarkably agrees with independent GPP estimates, FLUXSAT (137 GtC/year over 2001) in particular and FLUXCOM (121 GtC/year over 1990. Our results also suggest a biome dependency of the SIF-GPP relationship that needs to be improved for some plant functional types.

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Constraints on Tundra Productivity: Photosynthetic Capacity in Relation to Solar Radiation Utilization and Water Stress in Arctic and Alpine Tundras

Caldwell¹,

Johnson²,

Fareed³

1978

Ecological Studies

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Intensita fotosynthesy a obsah chlorofylu u různě starých listůNicotiana sanderae hort

Cited by 42 publications

References 26 publications

Quantifying the dynamics of light tolerance inArabidopsisplants during ontogenesis

Quantifying the dynamics of light tolerance inArabidopsisplants during ontogenesis

Improving Estimates of Gross Primary Productivity by Assimilating Solar‐Induced Fluorescence Satellite Retrievals in a Terrestrial Biosphere Model Using a Process‐Based SIF Model

Constraints on Tundra Productivity: Photosynthetic Capacity in Relation to Solar Radiation Utilization and Water Stress in Arctic and Alpine Tundras

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