18 O-rich Oxygen from Land Photosynthesis

Dongmann, G.; Förstel, H.; Wagener, K.

doi:10.1038/newbio240127a0

Cited by 19 publications

(14 citation statements)

References 7 publications

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“…Initially, Allison et al (1985) interpreted such a difference to be the result of dilution of the enriched waters by unfractionated waters in the veins of the leaves (assumed to constitute at times up to 30% of the total leaf-water volume). postulated that due to a slow water exchange the isotope composition of water in the mesophyll cells lags behind the steady state enrichment relative to the evaporation process, as could be described, for example, by the non-steady state model of Dongmann et al (1974) and more recently Seibt et al (2006).…”

Section: The Diurnal Cycle Of the Isotopic Composition Of Leaf Watermentioning

confidence: 97%

Stable isotope composition of water in desert plants

et al. 2007

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A survey of the stable isotope content of tissue waters of plants from the Negev desert was conducted. Large differences were observed in the extent of enrichment of the heavy isotopes in leaf water relative to local precipitation among different plants. This is apparently caused by the speciesdependent stratagems adopted by the plants to cope with water stress, primarily by differences in the depth of water uptake in the soil and through the timing of stomatal openings during the daily cycle. Salt stressed plants showed extreme variability in the isotopic composition of leaf-water. The results show that plants with adaptation to arid conditions can avoid the transpiration regime, which would lead to the strong isotopic enrichment in their leaf water expected under arid conditions. This has implications for the use of stable isotopes in plants as indicators of either plant ecophysiology or paleoclimate.

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Section: The Diurnal Cycle Of the Isotopic Composition Of Leaf Watermentioning

confidence: 97%

Stable isotope composition of water in desert plants

et al. 2007

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“…In an earlier paper [2] we emphasized, that the observed 180 enrichment of the leaf water should be reflected in the photosynthetically evolved oxygen. This fact could be important, if one considers the biogeochemical cycle of oxygen.…”

Section: Introductionmentioning

confidence: 95%

“…This effect is already known for some years [1][2][3][4]. The enrichment is caused by the transport of water vapour from the liquid phase of the leaves to the gaseous phase of air humidity.…”

Section: Introductionmentioning

confidence: 98%

The enrichment of18O in leaf water under natural conditions

Förstel

1978

Radiat Environ Biophys

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The enrichment of (18)O in the water of transpiring leaves under natural conditions is described. In the first series two, later three species at the same location and at the same time are compared (birch Betula pubescens L., oak Quercus robur Ehrh., larch Larix decidua Mill., and spruce Picea abies Karst). All four show parallel enrichment properties. In addition two beeches (Fagus silvatica L.) were observed, one at Jülich, the other at the Solling hills. They show similar (18)O/(16)O ratio fluctuation in their leaves during the time of observation. Three plant communities (beech forest B1, spruce forest F1, and meadow W, sites of the "Solling-Project", German Research Foundation, part of International Biological Program, at the Solling hills) show a daily course of the (18)O enrichment comparable to each other.

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“…The contribution of land photosynthesis was therefore overlooked. On the eontinents, however, photosynthesis mainly oceurs in transpiring leaves, where H~IsO is enriched due to differences in the vapor pressures [13,14,15]. The lsO-enriched water enters the photosynthetie process and oxygen released from land plants is thus enriched in 1so.…”

Section: Introductionmentioning

confidence: 99%

The contribution of land photosynthesis to the stationary enrichment of18O in the atmosphere

Dongmann

1974

Radiat Environ Biophys

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Summary. The stationary enrichment of 1sO in the earth's atmosphere (Dole-effect) does not result exclusively from respiration processes, but also from photosynthesis in transpiring plants. Using the global distribution patterns of relative humidity, photosynthetic aetivity and H21so coneentration in precipitation water, the eontribution of land photosynthesis to the Dole-effec~ is estimated to 8 %o.

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18 O-rich Oxygen from Land Photosynthesis

Cited by 19 publications

References 7 publications

Stable isotope composition of water in desert plants

Stable isotope composition of water in desert plants

The enrichment of18O in leaf water under natural conditions

The contribution of land photosynthesis to the stationary enrichment of18O in the atmosphere

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