Oxygen and Hydrogen Isotope Ratios of Water from Photosynthetic Tissues of CAM and C<sub>3</sub> Plants

Sternberg, Leonel da Silveira Lobo; DeNiro, Michael J.; Johnson, Hyrum B.

doi:10.1104/pp.82.2.428

Cited by 42 publications

(30 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, we also compared the dD-d 18 O slopes of plant and potential soil source waters. Systematic and predictable correlations between dD and d 18 O in meteoric waters (Craig 1961), soil (Barnes and Allison 1988), and plants (Allison et al 1985;Sternberg et al 1986;Cooper and DeNiro 1989) can be used to dierentiate between sources of water that may have similar dD or d 18 O values, but dierent dDd 18 O slopes. Since plants do not fractionate isotopes during root uptake of soil water (Wershaw et al 1966;Dawson and Ehleringer 1991), the dD-d 18 O slope for the soil water source should re¯ect the dD-d 18 O slope of extracted plant water.…”

Section: Methodsmentioning

confidence: 99%

Spatial and temporal soil moisture resource partitioning by trees and grasses in a temperate savanna, Arizona, USA

1997

View full text Add to dashboard Cite

Stable isotope analysis was used to determine sources of water used by coexisting trees and grasses in a temperate savanna dominated by Quercus emoryi Torr. We predicted that (1) tree seedlings and bunchgrasses utilize shallow sources of soil water, (2) mature savanna trees use deeper sources of water, and (3) trees switch from shallow to deep water sources within 1 year of germination. We found that Q. emoryi trees, saplings, and seedlings (about 2 months, 1 year, and 2 years old), and the dominant bunchgrass [Trachypogon montufari (H.B.K.) Nees.] utilized seasonally available moisture from different depths within the soil profile depending on size/age relationships. Sapling and mature Q. emoryi acquired water from >50 cm deep, 2-month-old seedlings utilized water from <15 cm, and 1- and 2-year-old seedlings and grasses used water from between 20 cm and 35 cm. This suggests that very young seedlings are decoupled from grasses in this system, which may facilitate germination and early establishment of Q. emoryi within extant stands of native grasses. The potential for subsequent interaction between Q. emoryi and native grasses was evidenced by similar patterns of soil water use by 1- and 2-year-old seedlings and grasses. Q. emoryi seedlings did not switch from shallow to deep sources of soil water within 2 years of germination: water use by these seedlings apparently becomes independent of water use by grasses after 2 years of age. Finally, older trees (saplings, mature trees) use water from deeper soil layers than grasses, which may facilitate the stable coexistence of mature trees and grasses. Potential shifts in the seasonality of precipitation may alter interactions between woody plants and grasses within temperate savannas characterized by bimodal precipitation regimes: reductions in summer precipitation or soil moisture may be particularly detrimental to warm-season grasses and seedlings of Q. emoryi.

show abstract

Section: Methodsmentioning

confidence: 99%

Spatial and temporal soil moisture resource partitioning by trees and grasses in a temperate savanna, Arizona, USA

1997

View full text Add to dashboard Cite

show abstract

“…Water was distilled from the soil and stem samples by vacuum distillation (Sternberg et al, 1986) for isotopic analysis. Oxygen isotope ratios of water were determined by a technique originally developed by Epstein & Mayeda (1953), modified so that a 1 mL aliquot of the sample water was equilibrated with 5 mL of CO 2 gas for 2 days at 25 1C.…”

Section: Stem Soil and Water Collection And D 18 O Analysismentioning

confidence: 99%

Fluctuating deposition of ocean water drives plant function on coastal sand dunes

Greaver

Sternberg

2006

Global Change Biology

View full text Add to dashboard Cite

Sea-level rise will alter the hydrology of terrestrial coastal ecosystems. As such, it becomes increasingly important to decipher the present role of ocean water in coastal ecosystems in order to assess the coming effects of sea-level rise scenarios. Sand dunes occur at the interface of land and sea. Traditionally, they are conceived as freshwater environments with rain and ground water as the only water sources available to vegetation. This study investigates the possibility of ocean water influx to dune soils and its effect on the physiology of sand dune vegetation. Stable isotopes are used to trace the path of ocean water from the soil to the vegetation. Soil salinity, water content and d 18 O values are measured concurrently with stem water and leaf tissue of eight species during the wet and dry season and from areas proximal and distal to the ocean. Our results indicate the dune ecosystem is a mixed freshwater and marine water system characterized by oceanic influence on dune hydrology that is spatially heterogeneous and fluctuates temporally. Ocean water influx to soil occurs via salt spray in areas 5-12 m from the ocean during dry season. Accordingly, vegetation nearest to the sea demonstrate a plastic response to ocean water deposition including elevated integrated water use efficiency (d 13 C leaf ) and uptake of ocean water that comprised up to 52% of xylem water. We suggest physiological plasticity in response to periodic ocean water influx may be a functional characteristic common to species on the leading edge of diverse coastal habitats and an important feature that should be included in modeling coastal ecosystems. Rising sea level would likely cause a repercussive landward shift of dune species in response to encroaching maritime influences. However, human development would restrict this process, potentially causing the demise of dune systems and the protection from land erosion they provide.

show abstract

“…This difference in biochemical reactions between C 4 and CAM plants produces different oxygen and hydrogen isotope ratios in plant water (Sternberg et al 1986). An example of a plant that fixes carbon this way is the epiphyte Spanish moss.…”

Section: Integrative Monitoring Methodsmentioning

confidence: 99%

Introduction to Phytoremediation of Contaminated Groundwater

Landmeyer

2012

View full text Add to dashboard Cite

Library of Congress Control Number: 2011937578# Springer ScienceþBusiness Media B.V. 2012 No part of this work may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording or otherwise, without written permission from the Publisher, with the exception of any material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Cover image: # 2011 JupiterImages CorporationPrinted on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) The deeper the roots, the higher the reach To Lori, Kaylee, and Ava-May our roots always find deep water.. Preface "Nature is driven by water"Leonardo da Vinci (from Richter 1888)Groundwater is one of our most important natural resources. Groundwater provides drinking water to more than 50% of the population of the United States. This fact may not surprise a domestic-well owner, but may surprise municipal water customers who drink tap water supplied by wells. A greater percentage of the population in other countries, particularly in the developing world, relies on groundwater. Groundwater usually requires minimal treatment prior to drinking as groundwater is filtered during flow through porous sediments. Moreover, groundwater can be decades to thousands of years old and, therefore, contain precipitation that fell long before the production and release of modern-day contaminants.These facts do not imply groundwater is protected from contamination. On the contrary, groundwater resources can be more vulnerable to contamination than surface water. For example, contaminant sources may be located a short vertical distance above shallow groundwater that typically is discharged to surface water or pumped by wells after only a few years in the subsurface with correspondingly little time for contaminant cleansing to occur. Alternatively, the slow groundwater-flow rates characteristic of deep groundwater means that contamination will take more time to be discharged from aquifers. In both cases, contamination of groundwater should be avoided if at all possible. If contamination occurs, remediation of groundwater to pre-contamination conditions should be accomplished as efficiently, as quickly, and as cost effectively as possible to ensure that current and future demands on the groundwater resource can be met.Phytoremediation is one of many potential alternatives that can be used to restore contaminated groundwater. In general, phytoremediation is the use of living organisms-plantsto restore contaminated environments to less harmful levels. It is commonly accepted that plants have the potential to cleanse the air, such as taking in carbon dioxide (CO 2 ) and releasing oxygen (O 2 ). But plants also have the potential to cleanse water. This is because water controls all aspects of plant survival; a glance at the waterless and plantless moon quickly confirms this statement. From seed to maturit...

show abstract

Oxygen and Hydrogen Isotope Ratios of Water from Photosynthetic Tissues of CAM and C₃ Plants

Cited by 42 publications

References 4 publications

Spatial and temporal soil moisture resource partitioning by trees and grasses in a temperate savanna, Arizona, USA

Spatial and temporal soil moisture resource partitioning by trees and grasses in a temperate savanna, Arizona, USA

Fluctuating deposition of ocean water drives plant function on coastal sand dunes

Introduction to Phytoremediation of Contaminated Groundwater

Contact Info

Product

Resources

About

Oxygen and Hydrogen Isotope Ratios of Water from Photosynthetic Tissues of CAM and C3 Plants

Cited by 42 publications

References 4 publications

Spatial and temporal soil moisture resource partitioning by trees and grasses in a temperate savanna, Arizona, USA

Spatial and temporal soil moisture resource partitioning by trees and grasses in a temperate savanna, Arizona, USA

Fluctuating deposition of ocean water drives plant function on coastal sand dunes

Introduction to Phytoremediation of Contaminated Groundwater

Contact Info

Product

Resources

About

Oxygen and Hydrogen Isotope Ratios of Water from Photosynthetic Tissues of CAM and C₃ Plants