Gas exchange acclimation to elevated CO2 in upper-sunlit and lower-shaded canopy leaves in relation to nitrogen acquisition and partitioning in wheat grown in field chambers

Pozo, Alejandro del; Pérez, Pilar Pérez; Gutiérrez, Diego G.; Alonso, Amanda; Morcuende, Rosa; Martínez‐Carrasco, Rafael

doi:10.1016/j.envexpbot.2006.04.009

Cited by 72 publications

(48 citation statements)

References 38 publications

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“…During the later growing periods, the inhibition of photosynthesis and biomass growth might be attributed to the acceleration of senescence with lower content of the Chl a and leaf nitrogen. This finding was consistent with earlier results in wheat (Pérez et al 2007).…”

Section: Carbon Storage In Above-ground Biomasssupporting

confidence: 83%

“…However, in the mature plants, the elevated CO 2 caused in this study a decline in N L and Chl content in the leaves both in the lower and upper layers, in agreement with some previous acclimation studies (Del Pozo et al 2007, Pérez et al 2007.…”

Section: Parameterssupporting

confidence: 79%

“…The depression of Φ PSII under the CO 2 enrichment increases the probability of excitation energy being dissipated by the increased NPQ in the antenna of PSII at high PPFD (Hymus et al 2001). In previous studies, the modification of NPQ have occurred in the leaves in the upper canopy , Pérez et al 2007), but not in the lower canopy. This was probably due to the offset effects of ageing and shading (Paper III).…”

Section: Parametersmentioning

confidence: 99%

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Seasonal responses of photosynthesis and growth of a bioenergy crop (Phalaris arundinacea L.) to climatic change under varying water regimes

Zhou¹

2011

Diss. For.

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Section: Carbon Storage In Above-ground Biomasssupporting

confidence: 83%

Section: Parameterssupporting

confidence: 79%

Section: Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Seasonal responses of photosynthesis and growth of a bioenergy crop (Phalaris arundinacea L.) to climatic change under varying water regimes

Zhou¹

2011

Diss. For.

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“…However, the leaves in the low layer that is shaded within canopy, show different photosynthetic responses compared with young leaves, representing the typical ageing-and shading-acclimated manner (Osborne et al 1998, Del Pozo et al 2007). The leafage distribution within the canopy with varying leaf nitrogen and Chl content determines the photosynthetic capacity and sink strength of the whole plant ).…”

Section: Introductionmentioning

confidence: 99%

Responses of leaf photosynthesis, pigments and chlorophyll fluorescence within canopy position in a boreal grass (Phalaris arundinacea L.) to elevated temperature and CO<sub>2</sub> under varying water regimes

Ge¹,

Zhou²,

Kellomäki³

et al. 2011

Photosynt.

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The effects of elevated growth temperature (ambient + 3.5 o C) and CO 2 (700 µmol mol −1 ) on leaf photosynthesis, pigments and chlorophyll fluorescence of a boreal perennial grass (Phalaris arundinacea L.) under different water regimes (well watered to water shortage) were investigated. Layer-specific measurements were conducted on the top (younger leaf) and low (older leaf) canopy positions of the plants after anthesis. During the early development stages, elevated temperature enhanced the maximum rate of photosynthesis (P max ) of the top layer leaves and the aboveground biomass, which resulted in earlier senescence and lower photosynthesis and biomass at the later periods. At the stage of plant maturity, the content of chlorophyll (Chl), leaf nitrogen (N L ), and light response of effective photochemical efficiency (Φ PSII ) and electron transport rate (ETR) was significantly lower under elevated temperature than ambient temperature in leaves at both layers. CO 2 enrichment enhanced the photosynthesis but led to a decline of N L and Chl content, as well as lower fluorescence parameters of Φ PSII and ETR in leaves at both layers. In addition, the downregulation by CO 2 elevation was significant at the low canopy position. Regardless of climate treatment, the water shortage had a strongly negative effect on the photosynthesis, biomass growth, and fluorescence parameters, particularly in the leaves from the low canopy position. Elevated temperature exacerbated the impact of water shortage, while CO 2 enrichment slightly alleviated the drought-induced adverse effects on P max . We suggest that the light response of Φ PSII and ETR, being more sensitive to leaf-age classes, reflect the photosynthetic responses to climatic treatments and drought stress better than the fluorescence parameters under dark adaptation. Abbreviations: Cars -carotenoid; Chl -chlorophyll; Chl a(b) -chlorophyll a(b); CON -ambient environment; EC -elevated CO 2 concentration; ET -elevated temperature; ETC -combination of temperature elevation and CO 2 enrichment; ETR -electron transport rate; F m -maximal chlorophyll fluorescence of dark-adapted state; F m ' -maximal chlorophyll fluorescence of light-adapted state; F 0 -minimum chlorophyll fluorescence of dark-adapted state; F 0 ' -minimum chlorophyll fluorescence of light-adapted state; F s -steady state fluorescence; F v /F m -maximal photochemical efficiency of PSII; g sat -light-saturated stomatal conductance; HW -high water level; LW -low water level; N L -leaf nitrogen; NW -normal water level; NPQ -nonphotochemical quenching; P max -maximum rate of photosynthesis; P N -net photosynthetic rate; PPFD -photosynthetic photon flux densities; PSII -photosystem II; q P -photochemical quenching; R D -dark respiration rates; RCG -Reed canary grass; Rubisco -ribulose 1,5-bisphosphate carboxylase/ oxygenase; RuBP -ribulose bisphosphate; α -apparent quantum yield; Φ PSII -the effective photochemical efficiency. Acknowledgments: This work was funded through the Finland Distinguished Professor Progra...

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“…In high density stand where the saplings grew too close to each other as well as in matured D. beccarii stand where there were massive canopy size and root system, led to overlapping canopies and limited space causing the saplings to compete for limited resources. The stomatal conductance decreased due to the limitation of CO 2 as the CO 2 mitigation in dense stand was higher than sparse or open stand (Del Pozo et al, 2007). Meanwhile, the competition to absorb water in the soil through overlapping root system (Manoli et al, 2014) directly reduce water availability for transpiration (Prieto et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Changes in Leaf Characteristics with Tree Age in <i>Dryobalanops beccarii</i> Dyer in a Restored Forest of Sarawak, Malaysia

Lapok

Huat

Chubo

et al. 2017

OnLine Journal of Biological Sciences

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Study on leaf properties of an endangered dipterocarp tree species, Dryobalanops beccarii, was conducted in a restored forest. The study focused on the morphology, nutrient concentration and gas exchange in well-developed leaves of D. beccarii at different ontogenetic phases. The hypothesis tested that leaf physiological and morphological changes are related to the nutrient concentration level of D. beccarii leaves in each ontogenetic phase. Seedling leaves were small and thin, whereas adult tree leaves were the large and thick. The stomata density per unit was abundant in adult tree leaves as compared to seedlings and saplings leaves. The net photosynthetic rate (Pn), transpiration rate (A) and stomatal conductance (g s ) was increased from the seedling phase until the sapling phase, but decreased as the D. beccarii reached the mature phase. Scarce stomata density in seedling leaves contributed to low Pn, A and g s , while sapling leaves recorded opposite results due to abundant stomata density accompanied by highest accumulation of nitrogen (N) content per unit leaf area. The low concentration of nitrogen (N), phosphorus (P) and magnesium (Mg) detracted the gas exchange performance. Hence, changes in leaf morphology and physiology of D. beccarii were affected by the differences in resource used at each tree ontogenetic phase.

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Gas exchange acclimation to elevated CO2 in upper-sunlit and lower-shaded canopy leaves in relation to nitrogen acquisition and partitioning in wheat grown in field chambers

Cited by 72 publications

References 38 publications

Seasonal responses of photosynthesis and growth of a bioenergy crop (Phalaris arundinacea L.) to climatic change under varying water regimes

Seasonal responses of photosynthesis and growth of a bioenergy crop (Phalaris arundinacea L.) to climatic change under varying water regimes

Responses of leaf photosynthesis, pigments and chlorophyll fluorescence within canopy position in a boreal grass (Phalaris arundinacea L.) to elevated temperature and CO<sub>2</sub> under varying water regimes

Changes in Leaf Characteristics with Tree Age in <i>Dryobalanops beccarii</i> Dyer in a Restored Forest of Sarawak, Malaysia

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