Photosynthetic irradiance-response in leaves of dwarf coconut palm (Cocos nucifera L. ‘nana’, Arecaceae): Comparison of three models

Gomes, Fábio Pinto; Oliva, Marco Antônio; Mielke, Marcelo Schramm; Almeida, A-A.F. de; Leite, Hélio Garcia

doi:10.1016/j.scienta.2006.02.030

Cited by 35 publications

(19 citation statements)

References 15 publications

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“…Data were fit according to non-rectangular hyperbola (Nippert & Marshall 2003;Gomes et al 2006;Lambers et al 2006), rectangular hyperbola (Gomes et al 2006), and exponential models (Gomes et al 2006;Yin et al 2006), and compared using Akaike's information criterion (AIC) and r 2 values. Based on lowest AIC and highest r 2 values, data best fit the rectangular hyperbola model:…”

Section: Statistical Analysesmentioning

confidence: 99%

Intraspecific Variation in Ecophysiology of Three Dominant Prairie Grasses Used in Restoration: Cultivar Versus Non‐Cultivar Population Sources

Lambert

Baer

Gibson

2011

Restoration Ecology

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Dominant species play crucial roles in determining plant community structure and ecosystem function. Cultivars of the dominant prairie grasses are widely used in prairie restoration and are selected for characters such as high biomass production, increased reproductive output, and stress tolerance. Genetic differences exist between cultivar and non-cultivar population sources of dominant tallgrass prairie species, which may have implications for plant performance in prairie restoration. We measured net photosynthesis (A net ), stomatal conductance (g s ), and water use efficiency (WUE) in cultivar and non-cultivar dominant tallgrass prairie species Andropogon gerardii Vitman, Sorghastrum nutans (L.) Nash, and Schizachyrium scoparium (Michx.) Nash in both a greenhouse experiment and an experimental tallgrass prairie restoration. We found indicators of enhanced physiological performance (higher A net , g s , and/or WUE) in cultivar population sources of all three dominant grass species relative to non-cultivars. For A. gerardii, cultivars exhibited higher A net and WUE than non-cultivars. For S. nutans, cultivars exhibited higher g s , whereas non-cultivars showed higher WUE. Lastly, cultivars of S. scoparium showed higher WUE than non-cultivar population sources. Our results show that population selection of dominant species in restoration can have consequences for plant performance, which may have implications for competitive interactions that affect community structure (i.e. diversity) and ecosystem function (i.e. aboveground net primary production) during the reassembly of prairie systems.

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Section: Statistical Analysesmentioning

confidence: 99%

Intraspecific Variation in Ecophysiology of Three Dominant Prairie Grasses Used in Restoration: Cultivar Versus Non‐Cultivar Population Sources

Lambert

Baer

Gibson

2011

Restoration Ecology

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“…To determine the photosynthetic parameters α , A max , J max , and V c max , we used the non‐rectangular hyperbola for the fitting of light response curves [ Marshall and Biscoe , 1980; Gomes et al , 2006]: where θ is the convexity term of the non‐rectangular hyperbola. CO 2 response curves are fitted with two functions depending on the Ci .…”

Section: In Situ Measurementsmentioning

confidence: 99%

Modeling canopy CO₂ and H₂O exchange of a temperate mixed forest

et al. 2010

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[1] We tested a multilayered model that simulated half-hour canopy CO 2 and H 2 O exchange of a temperate forest mixed with broadleaved trees and Korean pine. The variables input to the model for scaling the fluxes from leaf to canopy included the vertical profiles of height, canopy thickness, and leaf biomass of the five dominant tree species. The diurnal and seasonal patterns of modeled CO 2 and H 2 O fluxes agreed with measured values well during the nonstressed periods, while the model showed overestimation during the water-stressed and high-temperature periods, which appeared infrequently in our study site. We showed a strong correlation between 20-layer daily modeled fluxes and eddy covariance measurements for CO 2 (r 2 = 0.734) and H 2 O (r 2 = 0.785), during May to September 2003-2007. Different layered methods exerted influence on the radiation absorption within the canopy sublayers and hence on the CO 2 and H 2 O flux outputs. CO 2 and H 2 O fluxes based on the Gaussian 5-layered method were 8% and 1% lower than those based on the 20-layered method.

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“…The complete recovery of photosynthesis after drought in macauba palm indicates that photochemical and biochemical traits were not severely affected by water stress (Cornic 2000). Accumulation of abscisic acid in leaves suppresses photosynthetic recovery through lowering stomatal conductance after drought, as observed for the dwarf coconut (Gomes et al 2006) and the oil palm (Silva et al 2017). Despite the low leaflet water potential (Ψw = -2 MPa) for macauba palms in the first water stress cycle, the time for complete recovery of plants was short.…”

Section: Discussionmentioning

confidence: 97%

Increased atmospheric CO2 changes the photosynthetic responses of Acrocomia aculeata (Arecaceae) to drought

2019

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Water availability is the main factor that explains current patterns of palm abundance. However, the interaction between water stress and increasing atmospheric CO 2 concentrations caused by climatic change and its effects on palm physiology remain poorly known. Macauba palm is a widespread Neotropical species commonly found in ecosystems subjected to seasonal drought and has potential use in oil production. The present work investigated the influence of increased CO 2 concentrations on photosynthetic responses to drought in macauba palm plants. Exposure to increased CO 2 concentrations led to up-regulation of photosynthesis through higher stomatal conductance and improved light and water use efficiency. Macauba palm plants under water stress, irrespective of CO 2 concentration, were able to maintain constant levels of proline and chlorophyll, while preventing oxidative damage. Plants grown at higher CO 2 concentrations were more capable of recovering from drought due to higher Rubisco carboxylation rate (Vc max) and electron transport rate (J max), which prevented a reduction in total dry mass at the end of the stress period. Stomatal control of photosynthesis, coupled with the prevention of severe damage under stress, would allow efficient biomass production by the macauba palm under future scenarios of climate change.

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Photosynthetic irradiance-response in leaves of dwarf coconut palm (Cocos nucifera L. ‘nana’, Arecaceae): Comparison of three models

Cited by 35 publications

References 15 publications

Intraspecific Variation in Ecophysiology of Three Dominant Prairie Grasses Used in Restoration: Cultivar Versus Non‐Cultivar Population Sources

Intraspecific Variation in Ecophysiology of Three Dominant Prairie Grasses Used in Restoration: Cultivar Versus Non‐Cultivar Population Sources

Modeling canopy CO₂ and H₂O exchange of a temperate mixed forest

Increased atmospheric CO2 changes the photosynthetic responses of Acrocomia aculeata (Arecaceae) to drought

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Photosynthetic irradiance-response in leaves of dwarf coconut palm (Cocos nucifera L. ‘nana’, Arecaceae): Comparison of three models

Cited by 35 publications

References 15 publications

Intraspecific Variation in Ecophysiology of Three Dominant Prairie Grasses Used in Restoration: Cultivar Versus Non‐Cultivar Population Sources

Intraspecific Variation in Ecophysiology of Three Dominant Prairie Grasses Used in Restoration: Cultivar Versus Non‐Cultivar Population Sources

Modeling canopy CO2 and H2O exchange of a temperate mixed forest

Increased atmospheric CO2 changes the photosynthetic responses of Acrocomia aculeata (Arecaceae) to drought

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Product

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Modeling canopy CO₂ and H₂O exchange of a temperate mixed forest