2017
DOI: 10.2136/vzj2016.12.0128
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A Simple Representation of Plant Water Storage Effects in Coupled Soil Water Flow and Transpiration Stream Modeling

Abstract: When describing the movement of water in a variably saturated plant root zone, most existing hydrological models use the assumption of quasi-steadystate flow to relate root water uptake to canopy transpiration, thereby neglecting the effect of changing plant water storage. This approach is known to be problematic, especially when considering relatively large volumes of water stored in the tissues of tall trees. We propose a simple algorithm, based on the concept of whole-plant hydraulic capacitance, to deal wi… Show more

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Cited by 9 publications
(4 citation statements)
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“…Meanwhile, alternative local mechanisms may act in later stages to prevent dehydration and tissue damage. Hydraulic capacitance involves the use of tissue water storage to buffer local desiccation, maintain function ( Huang et al, 2017 ; Vogel et al, 2017 ), or reverse cavitation ( Brodersen et al, 2018 ). In that sense, polyploid plants may have an advantage over the 2x at preserving tissue water content as shown by the autotetraploid Arabidopsis detached rosette leaves ( del Pozo and Ramirez-Parra, 2014 ).…”
Section: Polyploidy Improves Stress Tolerancementioning
confidence: 99%
“…Meanwhile, alternative local mechanisms may act in later stages to prevent dehydration and tissue damage. Hydraulic capacitance involves the use of tissue water storage to buffer local desiccation, maintain function ( Huang et al, 2017 ; Vogel et al, 2017 ), or reverse cavitation ( Brodersen et al, 2018 ). In that sense, polyploid plants may have an advantage over the 2x at preserving tissue water content as shown by the autotetraploid Arabidopsis detached rosette leaves ( del Pozo and Ramirez-Parra, 2014 ).…”
Section: Polyploidy Improves Stress Tolerancementioning
confidence: 99%
“…The effect of the plant water storage is neglected (e.g, Javaux et al, 2013;Manoli et al, 2014). Such assumption, which is valid only for small crops (Hartzell et al, 2017;Vogel et al, 2017), implies that the xylem flow Q XYL (L 3 /T) is equal to the transpiration stream through the roots and stem, Q TP , while it is partitioned in fruits and leaves using corresponding surface areas (Trapp, 2007).…”
Section: Translocationmentioning
confidence: 99%
“…Plant water storage contributes significantly to transpiration by buffering the water stress during daytime through nocturnal water uptake by roots (C. W. Huang et al, 2017) and possibly at seasonal scales in some tropical woodlands (Tian et al, 2018). It also can reduce the risk of xylem embolism as evidenced by observation and modeling experiments (Niu et al, 2020;Vogel et al, 2017;Waring & Running, 1978). The new carbon allocation scheme tends to allocate more GPP to roots under water stress with a maximum of 30% (Niu et al, 2020).…”
Section: Discussionmentioning
confidence: 99%