moisture {medfate}R Documentation

Tissue moisture functions

Description

Set of functions used to calculate tissue moisture from water potential and viceversa.

Usage

moisture_sapwoodWaterCapacity(Al2As, height, V, L, wd)

moisture_leafWaterCapacity(SLA, ld)

moisture_turgorLossPoint(pi0, epsilon)

moisture_symplasticRWC(psiSym, pi0, epsilon)

moisture_symplasticPsi(RWC, pi0, epsilon)

moisture_apoplasticRWC(psiApo, c, d)

moisture_apoplasticPsi(RWC, c, d)

moisture_tissueRWC(psiSym, pi0, epsilon, psiApo, c, d, af)

plant_water(x)

moisture_pressureVolumeCurvePlot(
  x,
  segment = "stem",
  fraction = "all",
  psiVec = seq(-0.1, -8, by = -0.01),
  speciesNames = FALSE
)

Arguments

Al2As

Leaf area to sapwood area (in m2·m-2).

height

Plant height (in cm).

V

Vector with the proportion [0-1] of fine roots within each soil layer.

L

Vector with the length of coarse roots (mm) for each soil layer.

wd

Wood density (g·cm-3).

SLA

Specific leaf area (mm2·mg-1).

ld

Leaf tissue density (g·cm-3).

pi0

Full turgor osmotic potential (MPa).

epsilon

Bulk modulus of elasticity (MPa).

psiSym, psiApo

Symplastic or apoplastic water potential (MPa).

RWC

Relative water content [0-1].

c, d

Parameters of the xylem vulnerability curve.

af

Apoplastic fraction (proportion) in the segment (e.g. leaf or stem).

x

An object of class spwbInput or growthInput.

segment

Segment whose relative water content curve to plot, either "stem" or "leaf" (the latter only available if transpirationMode = "Sperry" or transpirationMode = "Sureau").

fraction

Tissue fraction, either "symplastic", "apoplastic" or "all".

psiVec

Vector of water potential values to evaluate for the pressure-volume curve.

speciesNames

A flag to indicate the use of species names instead of cohort names in plots.

Value

Values returned for each function are:

Author(s)

Miquel De Cáceres Ainsa, CREAF

References

Bartlett, M.K., Scoffoni, C., Sack, L. 2012. The determinants of leaf turgor loss point and prediction of drought tolerance of species and biomes: a global meta-analysis. Ecology Letters 15: 393–405.

Hölttä, T., Cochard, H., Nikinmaa, E., Mencuccini, M. 2009. Capacitive effect of cavitation in xylem conduits: Results from a dynamic model. Plant, Cell and Environment 32: 10–21.

Martin-StPaul, N., Delzon, S., Cochard, H. 2017. Plant resistance to drought depends on timely stomatal closure. Ecology Letters 20: 1437–1447.

See Also

hydraulics_psi2K, hydraulics_supplyFunctionPlot, spwb, soil

Examples

psi = seq(-10,0, by=0.1)
rwc_s = rep(NA, length(psi))
for(i in 1:length(psi)) rwc_s[i] = moisture_symplasticRWC(psi[i],-3,12)
plot(psi, rwc_s, type="l", xlab="Water potential (MPa)", ylab = "Symplasmic RWC")


[Package medfate version 4.8.1 Index]