scholarly journals The oxygen isotope enrichment of leaf‐exported assimilates – does it always reflect lamina leaf water enrichment?

2013 ◽  
Vol 200 (1) ◽  
pp. 144-157 ◽  
Author(s):  
Arthur Gessler ◽  
Elke Brandes ◽  
Claudia Keitel ◽  
Sonja Boda ◽  
Zachary E. Kayler ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Leaf Water ◽  
Isotope Enrichment

scholarly journals Environmental Effects on Oxygen Isotope Enrichment of Leaf Water in Cotton Leaves

2007 ◽  
Vol 146 (2) ◽  
pp. 729-736 ◽  
Author(s):  
Francesco Ripullone ◽  
Naoko Matsuo ◽  
Hilary Stuart-Williams ◽  
Suan Chin Wong ◽  
Marco Borghetti ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Environmental Effects ◽  
Leaf Water ◽  
Isotope Enrichment

Transpiration rate relates to within- and across-species variations in effective path length in a leaf water model of oxygen isotope enrichment

2013 ◽  
Vol 36 (7) ◽  
pp. 1338-1351 ◽  
Author(s):  
XIN SONG ◽  
MARGARET M. BARBOUR ◽  
GRAHAM D. FARQUHAR ◽  
DAVID R. VANN ◽  
BRENT R. HELLIKER
Keyword(s):  
Oxygen Isotope ◽  
Transpiration Rate ◽  
Path Length ◽  
Leaf Water ◽  
Water Model ◽  
Isotope Enrichment ◽  
Effective Path Length ◽  
Effective Path

scholarly journals Leaf cell wall properties and stomatal density influence oxygen isotope enrichment of leaf water

2020 ◽  
Author(s):  
Patrick Ellsworth ◽  
Patricia Ellsworth ◽  
Rachel Mertz ◽  
Nuria Koteyeva ◽  
Asaph B. Cousins
Keyword(s):  
Cell Wall ◽  
Oxygen Isotope ◽  
Stomatal Density ◽  
Leaf Water ◽  
Isotope Enrichment ◽  
Leaf Cell ◽  
Wall Properties ◽  
Cell Wall Properties

Oxygen isotope enrichment (Δ18O) reflects yield potential and drought resistance in maize

2009 ◽  
Vol 32 (11) ◽  
pp. 1487-1499 ◽  
Author(s):  
LLORENÇ CABRERA-BOSQUET ◽  
CIRO SÁNCHEZ ◽  
JOSÉ LUIS ARAUS
Keyword(s):  
Oxygen Isotope ◽  
Drought Resistance ◽  
Yield Potential ◽  
Isotope Enrichment

scholarly journals Effects of leaf length and development stage on the triple oxygen isotope signature of grass leaf water and phytoliths: insights for a proxy of continental atmospheric humidity

2019 ◽  
Vol 16 (23) ◽  
pp. 4613-4625 ◽  
Author(s):  
Anne Alexandre ◽  
Elizabeth Webb ◽  
Amaelle Landais ◽  
Clément Piel ◽  
Sébastien Devidal ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Climate Model ◽  
Isotope Composition ◽  
Leaf Growth ◽  
Development Stage ◽  
Mean Value ◽  
Leaf Length ◽  
Leaf Water ◽  
Grass Species ◽  
Leaf Biomass

Abstract. Continental relative humidity (RH) is a key climate parameter, but there is a lack of quantitative RH proxies suitable for climate model–data comparisons. Recently, a combination of climate chamber and natural transect calibrations have laid the groundwork for examining the robustness of the triple oxygen isotope composition (δ′18O and 17O-excess) of phytoliths, that can preserve in sediments, as a new proxy for past changes in RH. However, it was recommended that besides RH, additional factors that may impact δ′18O and 17O-excess of plant water and phytoliths be examined. Here, the effects of grass leaf length, leaf development stage and day–night alternations are addressed from growth chamber experiments. The triple oxygen isotope compositions of leaf water and phytoliths of the grass species F. arundinacea are analysed. Evolution of the leaf water δ′18O and 17O-excess along the leaf length can be modelled using a string-of-lakes approach to which an unevaporated–evaporated mixing equation must be added. We show that for phytoliths to record this evolution, a kinetic fractionation between leaf water and silica, increasing from the base to the apex, must be assumed. Despite the isotope heterogeneity of leaf water along the leaf length, the bulk leaf phytolith δ′18O and 17O-excess values can be estimated from the Craig and Gordon model and a mean leaf water–phytolith fractionation exponent (λPhyto-LW) of 0.521. In addition to not being leaf length dependent, δ′18O and 17O-excess of grass phytoliths are expected to be impacted only very slightly by the stem vs. leaf biomass ratio. Our experiment additionally shows that because a lot of silica polymerises in grasses when the leaf reaches senescence (58 % of leaf phytoliths in mass), RH prevailing during the start of senescence should be considered in addition to RH prevailing during leaf growth when interpreting the 17O-excess of grass bulk phytoliths. Although under the study conditions 17O-excessPhyto do not vary significantly from constant day to day–night conditions, additional monitoring at low RH conditions should be done before drawing any generalisable conclusions. Overall, this study strengthens the reliability of the 17O-excess of phytoliths to be used as a proxy of RH. If future studies show that the mean value of 0.521 used for the grass leaf water–phytolith fractionation exponent λPhyto-LW is not climate dependent, then grassland leaf water 17O-excess obtained from grassland phytolith 17O-excess would inform on isotope signals of several soil–plant-atmosphere processes.

Oxygen isotope enrichment (Δ18O) as a measure of time-averaged transpiration rate

2005 ◽  
Vol 56 (422) ◽  
pp. 3033-3039 ◽  
Author(s):  
M. S. Sheshshayee ◽  
H. Bindumadhava ◽  
R. Ramesh ◽  
T. G. Prasad ◽  
M. R. Lakshminarayana ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Transpiration Rate ◽  
Isotope Enrichment

scholarly journals Oxygen isotope enrichment of organic matter in Ricinus communis during the diel course and as affected by assimilate transport

2007 ◽  
Vol 174 (3) ◽  
pp. 600-613 ◽  
Author(s):  
Arthur Gessler ◽  
Andreas D. Peuke ◽  
Claudia Keitel ◽  
Graham D. Farquhar
Keyword(s):  
Organic Matter ◽  
Oxygen Isotope ◽  
Ricinus Communis ◽  
Assimilate Transport ◽  
Isotope Enrichment

Modelling the isotope enrichment of leaf water

2004 ◽  
Vol 48 (6) ◽  
pp. 672-702 ◽  
Author(s):  
B. Barnes ◽  
G. Farquhar ◽  
K. Gan
Keyword(s):  
Leaf Water ◽  
Isotope Enrichment
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