Comparison of leaf gas exchange and stable isotope signature of water‐soluble compounds along canopy gradients of co‐occurring Douglas‐fir and European beech

Bögelein, Rebekka; Hassdenteufel, Martin; Thomas, Frank M.; Werner, Willy

doi:10.1111/j.1365-3040.2012.02486.x

Cited by 30 publications

(39 citation statements)

References 65 publications

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“…for poplar35 and eucalyptus36, was furthermore revealed by provenance-specific variation in discrimination against stable carbon isotopes (Δ 13 C WSOM ). Δ 13 C WSOM is a time-integrated proxy of the intrinsic water use efficiency (IWUE) that exacerbates potential differences in A/g s 3738. Although the A/g s ratio was rather invariable (Fig.…”

Section: Discussionmentioning

confidence: 99%

Variation in short-term and long-term responses of photosynthesis and isoprenoid-mediated photoprotection to soil water availability in four Douglas-fir provenances

Junker

Kleiber

Jansen

et al. 2017

Sci Rep

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For long-lived forest tree species, the understanding of intraspecific variation among populations and their response to water availability can reveal their ability to cope with and adapt to climate change. Dissipation of excess excitation energy, mediated by photoprotective isoprenoids, is an important defense mechanism against drought and high light when photosynthesis is hampered. We used 50-year-old Douglas-fir trees of four provenances at two common garden experiments to characterize provenance-specific variation in photosynthesis and photoprotective mechanisms mediated by essential and non-essential isoprenoids in response to soil water availability and solar radiation. All provenances revealed uniform photoprotective responses to high solar radiation, including increased de-epoxidation of photoprotective xanthophyll cycle pigments and enhanced emission of volatile monoterpenes. In contrast, we observed differences between provenances in response to drought, where provenances sustaining higher CO2 assimilation rates also revealed increased water-use efficiency, carotenoid-chlorophyll ratios, pools of xanthophyll cycle pigments, β-carotene and stored monoterpenes. Our results demonstrate that local adaptation to contrasting habitats affected chlorophyll-carotenoid ratios, pool sizes of photoprotective xanthophylls, β-carotene, and stored volatile isoprenoids. We conclude that intraspecific variation in isoprenoid-mediated photoprotective mechanisms contributes to the adaptive potential of Douglas-fir provenances to climate change.

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Section: Discussionmentioning

confidence: 99%

Variation in short-term and long-term responses of photosynthesis and isoprenoid-mediated photoprotection to soil water availability in four Douglas-fir provenances

Junker

Kleiber

Jansen

et al. 2017

Sci Rep

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“…Similar to the collection of leaf WSOM, 75 mg twig phloem samples were soaked in 1.75 mL double demineralized water in a 2.0 mL centrifuge tube at room temperature for 24 h. According to Schneider et al . (1996) and Bogelein et al . (2012), contamination of cellular constituents dissolving into the solution is negligible during this time period.…”

Section: Methodsmentioning

confidence: 94%

“…(2004) for beech. However, Bogelein et al . (2012) found that there was 13 C enrichment in twig phloem exudates in comparison to leaf WSOM in the upper and middle beech canopy, but such enrichment was not detected in the lower shaded beech canopy.…”

Section: Discussionmentioning

confidence: 99%

“…However, the potential post-photosynthetic carbon isotope fractionation mechanism can be species-specific. For example, Bogelein et al . (2012) claimed that twig phloem WSOM was 13 C enriched compared with leaf WSOM throughout the whole canopy for Douglas fir.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, photosynthetic 13 C discrimination is dependent on the chloroplastic CO 2 concentration (C c ), rather than C i . Recently, studies have demonstrated that mesophyll resistance to CO 2 diffusion would cause a drawdown from C i to C c, which means mesophyll conductance (g m ) should be carefully considered (Flexas et al ., 2006; Warren and Adams, 2006; Bogelein et al ., 2012). The more comprehensive equation can be expressed as (Farquhar et al ., 1982; Seibt et al ., 2008):…”

Section: Methodsmentioning

confidence: 99%

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Water stress and CO₂concentration interactions affect carbon isotope signatures of leaf and phloem organic matter

Zhang

Chen

Jia

et al. 2018

Preprint

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Investigation of δ13C of leaf and twig phloem water-soluble organic material (WSOM) is a promising approach for analysis of the effects of environmental factors on plant performance. In this study, orthogonal treatments of three CO2 concentrations (Ca) × five soil water contents (SWC) were conducted using Platycladus orientalis saplings to investigate the interaction of water stress and CO2 concentration on δ13C of leaf and twig phloem WSOM. Under the lowest SWC, the δ13C of leaf and twig phloem WSOM had the most positive values at any Ca and their values decreased as Ca increased. However, at improved soil water conditions, the greatest values of δ13C of leaf and twig phloem WSOM were mostly observed at C600. In addition, a more significant relationship between SWC and δ13C of twig phloem WSOM than that between SWC and δ13C of leaf WSOM demonstrated that δ13C of twig phloem WSOM is a more sensitive indicator of SWC. Twig phloem WSOM was generally 13C-depleted compared with leaf WSOM for potential post-photosynthetic fractionation, and the 13C discrimination from leaves to twig phloem was insensitive to the interaction between SWC and Ca. Clearly, interacting effects play a more important role in photosynthetic fractionation than in post-photosynthetic fractionation.HighlightThe δ13C of leaf and twig phloem WSOM exhibited the most positive values at C400×35%–45% FC.Post-photosynthetic fractionation from leaf to twig was not be impacted by the interacting effects.

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CO2 Diffusion Inside Photosynthetic Organs

Flexas

Cano

Carriquí

et al. 2018

Advances in Photosynthesis and Respiration

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Comparison of leaf gas exchange and stable isotope signature of water‐soluble compounds along canopy gradients of co‐occurring Douglas‐fir and European beech

Cited by 30 publications

References 65 publications

Variation in short-term and long-term responses of photosynthesis and isoprenoid-mediated photoprotection to soil water availability in four Douglas-fir provenances

Variation in short-term and long-term responses of photosynthesis and isoprenoid-mediated photoprotection to soil water availability in four Douglas-fir provenances

Water stress and CO₂concentration interactions affect carbon isotope signatures of leaf and phloem organic matter

CO2 Diffusion Inside Photosynthetic Organs

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Comparison of leaf gas exchange and stable isotope signature of water‐soluble compounds along canopy gradients of co‐occurring Douglas‐fir and European beech

Cited by 30 publications

References 65 publications

Variation in short-term and long-term responses of photosynthesis and isoprenoid-mediated photoprotection to soil water availability in four Douglas-fir provenances

Variation in short-term and long-term responses of photosynthesis and isoprenoid-mediated photoprotection to soil water availability in four Douglas-fir provenances

Water stress and CO2concentration interactions affect carbon isotope signatures of leaf and phloem organic matter

CO2 Diffusion Inside Photosynthetic Organs

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Water stress and CO₂concentration interactions affect carbon isotope signatures of leaf and phloem organic matter