The Use of the Ratio between the Photosynthesis Parameters Pmland Vcmaxfor Scaling up Photosynthesis of C3Plants from Leaves to Canopies: A Critical Examination of Different Modelling Approaches

Wohlfahrt, Georg; Bahn, Michael; Cernusca, Alexander

doi:10.1006/jtbi.1999.0985

Cited by 14 publications

(10 citation statements)

References 58 publications

(72 reference statements)

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“…The degree of control that plants have over the relationship between J max and V cmax needs to be tested in controlled environments at a range of temperature and light levels (Wohlfahrt et al. ) and giving consideration to mesophyll conductance and leaf absorptance.…”

Section: Discussionmentioning

confidence: 99%

“…Aggregated across the different species and environments, support for co-ordination at light saturation is a very general assertion. The degree of control that plants have over the relationship between J max and V cmax needs to be tested in controlled environments at a range of temperature and light levels (Wohlfahrt et al 1999a) and giving consideration to mesophyll conductance and leaf absorptance. Maire et al (2012) show that coordination occurs over monthly timescales, while our simulations (Fig.…”

Section: Resource Allocation Between J Max and V Cmaxmentioning

confidence: 99%

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The relationship of leaf photosynthetic traits – V_cmax and J_max – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study

Walker

Beckerman

et al. 2014

Ecology and Evolution

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382

401

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Great uncertainty exists in the global exchange of carbon between the atmosphere and the terrestrial biosphere. An important source of this uncertainty lies in the dependency of photosynthesis on the maximum rate of carboxylation (Vcmax) and the maximum rate of electron transport (Jmax). Understanding and making accurate prediction of C fluxes thus requires accurate characterization of these rates and their relationship with plant nutrient status over large geographic scales. Plant nutrient status is indicated by the traits: leaf nitrogen (N), leaf phosphorus (P), and specific leaf area (SLA). Correlations between Vcmax and Jmax and leaf nitrogen (N) are typically derived from local to global scales, while correlations with leaf phosphorus (P) and specific leaf area (SLA) have typically been derived at a local scale. Thus, there is no global-scale relationship between Vcmax and Jmax and P or SLA limiting the ability of global-scale carbon flux models do not account for P or SLA. We gathered published data from 24 studies to reveal global relationships of Vcmax and Jmax with leaf N, P, and SLA. Vcmax was strongly related to leaf N, and increasing leaf P substantially increased the sensitivity of Vcmax to leaf N. Jmax was strongly related to Vcmax, and neither leaf N, P, or SLA had a substantial impact on the relationship. Although more data are needed to expand the applicability of the relationship, we show leaf P is a globally important determinant of photosynthetic rates. In a model of photosynthesis, we showed that at high leaf N (3 gm−2), increasing leaf P from 0.05 to 0.22 gm−2 nearly doubled assimilation rates. Finally, we show that plants may employ a conservative strategy of Jmax to Vcmax coordination that restricts photoinhibition when carboxylation is limiting at the expense of maximizing photosynthetic rates when light is limiting.

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Section: Discussionmentioning

confidence: 99%

Section: Resource Allocation Between J Max and V Cmaxmentioning

confidence: 99%

The relationship of leaf photosynthetic traits – V_cmax and J_max – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study

Walker

Beckerman

et al. 2014

Ecology and Evolution

Self Cite

382

401

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“…The dotted line (P ml = 0·668·V cmax , R 2 = 0·92, P < 0·151) represents results re-calculated from Wullschleger (1993; restricted to those measured at 20 °C; cf. Wohlfahrt et al 1999), assuming that four electrons are sufficient to regenerate one molecule of RuBP (Farquhar & Von Caemmerer 1982). ically investing a smaller proportion of available resources into electron transport than the species examined by Wullschleger (1993), of which more than 90% were either agricultural/horticultural crops or woody species.…”

Section: Discussionmentioning

confidence: 99%

Inter‐specific variation of the biochemical limitation to photosynthesis and related leaf traits of 30 species from mountain grassland ecosystems under different land use

Wohlfahrt

Bahn

Haubner

et al. 1999

Plant Cell & Environment

103

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previously published A/Ci curves. Despite multi-fold differences in the absolute values of V cmax and J max , when plotting them against each other they surprisingly gather together around a single straight line, indicating a close correlation between these two processes. Later, Leuning (1997) further improved this correlation, accounting for the temperature dependency of V cmax and J max , by scaling the results obtained by Wullschleger (1993) to a common temperature of 20 °C. It was this relationship which attracted the modellers' attention (e.g. Farquhar, Von Caemmerer & Berry 1980; Leuning et al. 1995;Baldocchi & Meyers 1998), because it reduces by one the number of parameters to be specified, since once V cmax has been determined, J max may be calculated easily just by multiplication.Not really surprisingly, however, this approach has also caused criticism (Niinemets & Tenhunen 1997;Wohlfahrt et al. 1998) due to the fact that, despite the close correlation between J max and V cmax , there still remains a considerable amount of variation, even after having been scaled to a common temperature (Leuning 1997). It is not clear whether the variation is due to species-specific differences in the proportional allocation between J max and V cmax or whether it is caused by the environmental conditions (day length, length of the growing season, light and nutrient availability, temperature and other micro-climatic factors) encountered by the plants during their development. Among the species analysed by Wullschleger (1993), almost 50% are agricultural or horticultural crops, which gives rise to the question of whether a relationship based largely on these will be successful in predicting assimilation of wild species (Baldocchi & Meyers 1998). Wild herbaceous species are considerably under-represented in the dataset of Wullschleger (1993), comprising less than 10%. Moreover most of the species analysed by Wullschleger (1993) were grown in controlled environments, which potentially may lead to biased results if this relationship derived mainly from plants grown under controlled conditions is used for scaling up gas exchange in the field (Leuning et al. 1995;De Pury & Farquhar 1997;Baldocchi & Meyers 1998), since adaptation of the photosynthetic apparatus to growth conditions, such as light, temperature and nutrients, has been documented for a large number of species (e.g. ABSTRACTThe maximum rate of carboxylation (V cmax ) and the potential rate of RuBP regeneration (P ml , which equals J max /4), as well as leaf nitrogen content (N L ) and specific leaf area (SLA), were studied in sun leaves of 30 species from differently managed mountain grassland ecosystems (abandoned areas, pastures and meadows) at three study areas in the Eastern Alps. A significant correlation between V cmax and P ml across the investigated species was observed. In comparison to a previous survey on the relationship between P ml and V cmax , the investigated species were found to invest a proportionally smaller amount of available resources into...

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“…Second, the fraction of shaded leaves, which receive only diffuse light, increases with increasing LAI (Ross, 1981). In contrast to sunlit leaves, the photosynthesis of shaded leaves is usually limited by light and not by the partial pressure of CO 2 (Wohlfahrt et al, 1999), which enters leaves through the same pathway water vapour is lost, the stomata (Larcher, 2001). In order to avoid excessive water loss, shaded leaves thus generally reduce stomatal conductance and thus transpiration (Mooney et al, 1983;Bunce, 2000;Matsumoto et al, 2005).…”

Section: Egumentioning

confidence: 99%

Leaf area controls on energy partitioning of a mountain grassland

Hammerle¹,

Haslwanter²,

Tappeiner³

et al. 2007

Preprint

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Abstract. Using a six year data set of eddy covariance flux measurements of sensible and latent heat, soil heat flux, net radiation, above-ground phytomass and meteorological driving forces energy partitioning was investigated at a temperate mountain grassland managed as a hay meadow in the Stubai Valley (Austria). The main findings of the study were: i) Energy partitioning was dominated by latent heat, followed by sensible heat and the soil heat flux; ii) When compared to standard environmental forcings, the amount of green plant matter, which due to three cuts varied considerably during the vegetation period, explained similar, and partially larger, fractions of the variability in energy partitioning; ii) There were little, if any, indications of water stress effects on energy partitioning, despite reductions in soil water availability in combination with high evaporative demand, e.g. during the summer drought of 2003.

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The Use of the Ratio between the Photosynthesis Parameters Pmland Vcmaxfor Scaling up Photosynthesis of C3Plants from Leaves to Canopies: A Critical Examination of Different Modelling Approaches

Cited by 14 publications

References 58 publications

The relationship of leaf photosynthetic traits – V_cmax and J_max – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study

The relationship of leaf photosynthetic traits – V_cmax and J_max – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study

Inter‐specific variation of the biochemical limitation to photosynthesis and related leaf traits of 30 species from mountain grassland ecosystems under different land use

Leaf area controls on energy partitioning of a mountain grassland

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The Use of the Ratio between the Photosynthesis Parameters Pmland Vcmaxfor Scaling up Photosynthesis of C3Plants from Leaves to Canopies: A Critical Examination of Different Modelling Approaches

Cited by 14 publications

References 58 publications

The relationship of leaf photosynthetic traits – Vcmax and Jmax – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study

The relationship of leaf photosynthetic traits – Vcmax and Jmax – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study

Inter‐specific variation of the biochemical limitation to photosynthesis and related leaf traits of 30 species from mountain grassland ecosystems under different land use

Leaf area controls on energy partitioning of a mountain grassland

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Product

Resources

About

The relationship of leaf photosynthetic traits – V_cmax and J_max – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study

The relationship of leaf photosynthetic traits – V_cmax and J_max – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta‐analysis and modeling study