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Showing 1 to 14 of 14 for “"Xylem water"”.
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A study of isotopic composition of xylem water of woody vegetation and groundwater along a precipitation gradient in Namibia
An understanding of the water used by vegetation in water limited environment is critical to fully understand water relations of natural areas with vegetation. Such information can be integrated in water management plans to estimate the influence of groundwater abstraction on the vegetation. Trees …
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An isotopic assessment of the water sourced by Ischyrolepis Sieberi (Restionaceae) growing at high altitudes in the Cedarberg : does fog play an important role?
… in the Cederberg captures fog to supplement its water needs. This was done by comparing the isotopic ratios of δD and δ¹⁸O in captured fog, rainwater, and stream water and comparing these to the δD and δ¹⁸O values found in the xylem water of Ischyrolepis sieberi plants growing at the study site. …
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Ecophysiology of Barrier Island Beach Plants: Responses in Form and Function to Daily, Seasonal and Episodic Stresses
… measurements were taken and soil water content determined in an effort to assess water availability in the BI beach environment. Additionally, plant strategies for mediating water stress were addressed via life-history trait determination, xylem water potential and gas exchange …
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Physiological response of two turfgrass species to increasing drought and salinity stress using a line source gradient
… any diminished turfgrass quality, if total water potentials {dollar}\rm(\Psi\sb{T}){dollar} were maintained above species specific thresholds, where {dollar}\rm\Psi\sb{T}{dollar} is defined as the sum of the matric {dollar}\rm(\Psi\sb{M}){dollar} and osmotic {dollar}\rm(\Psi\sb{\Pi}){dollar} …
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Variation in the Bimodal Precipitation Regime of Southern Nevada, USA Measured in Tree-Ring Isotopes
… with regional seasonal patterns of integrated water vapor transport from 2011-2017. Biweekly measurements of stable isotopes in precipitation and xylem water were related to stable isotopes in the α-cellulose of tree rings to interpret subseasonal climatic patterns for the 2015 and 2016 growing …
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Eco-hydrological pathways inferred from stable isotopes in a Pinus ponderosa and Pinus monophylla woodland of the Sheep Range, southern Great Basin, USA
… Great Basin, I tested the hypothesis that tree xylem water during the growing season is a reflection of either groundwater or summer precipitation from the NAMS. Stable isotope ratios were used to examine seasonal plant water sources in two high-elevation tree species found in the southern Great …
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Stock plant nutrition and stem cutting water relations during propagation of four woody nursery crops
… Stem cutting survival and rooting, midday xylem water potential, and basal water uptake all generally increased with increasing medium moisture level. Incidence of cutting basal rot was not directly related to medium moisture level, but was related to species and growth stage of the stock …
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Groundcover, rootstock and root restriction effects on vegetative growth, crop yield components, and fruit composition of Cabernet Sauvignon
… RR treatments was a sustained reduction in stem (xylem) water potential. UTCC and RR caused significant 7 and 10% reductions in berry weight, compared to their conventional controls. Berry weights of vines grafted to riparia were greater than those of vines grafted to other rootstocks. Wine made …
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Physiological and growth responses to thinning in eight-year-old loblolly pine (Pinus taeda L.) stands
… on the photosynthetic rate, needle conductance, xylem water potential, water use efficiency and growth of loblolly pine trees was studied during their ninth and tenth growing seasons. Litterfall dynamics were monitored throughout the study period as well. At the end of the second post-thinning …
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Molecular distributions and hydrogen isotopic compositions of n-alkanes from field studies of tree species: applications for paleoclimate studies
… δD values are highly correlated with source water δD values (Sachse 2012), and 2) the δD values of n-alkanes within a single site show little variation (Hou 2007). n-alkane molecular distributions are also used to infer the dominant source of n-alkanes input into sediment archives (Seki …
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An investigation into using stable water isotopes to determine the dependency of vegetation on groundwater at Cape Point Nature Reserve
We hypothesized that rainwater had a different and distinct isotopic signal to groundwater, and thus plants growing on groundwater-fed areas would have a unique and distinct isotopic composition compared to plants growing on freely-drained soils. We studied two groundwater-fed areas and adjacent …
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Physiological responses of sun and shade foliage in thinned and unthinned ten-year-old loblolly pine stands
… and lower (shade) crown foliage were examined. Xylem water potential, litterfall dynamics and tree growth were monitored. Nutrient availability, chlorophyll content and chlorophyll a/b ratio were assessed. At the end of the third post-thinning growing season (eleventh season since planting), …
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Characterization of water stress during cold storage and establishment for Acer platanoides and Crataegus phaenopyrum
… and subjected to mist or non-mist treatments. Xylem water potential increased (became less negative) for misted maple and cherry trees. Water potential increased for non-misted maple and decreased for non-misted cherry trees. Maple and hawthorn seedlings were subjected to cold storage durations …
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A physiological basis to crop improvement and agronomic development
… or expensive; as an example, measuring plant water status in the field is problematic, with techniques such as psychrometry generally only being suitable for laboratory studies. Therefore, proxy such as tissue RWC may be a good alternative measure of plant water status. We aimed to address …