Rate constants k1 Pr -> Pfr; k2 Pfr -> Pr; photoconversion rate nu = k1 + k2 for Type I Phytochrome.
Usage
Phy_reaction_rates(
w.length,
s.irrad,
unit.in = "energy",
check.spectrum = TRUE,
use.cached.mult = FALSE
)Arguments
- w.length
numeric array of wavelength (nm)
- s.irrad
numeric array of spectral (energy) irradiances (W m-2 nm-1) or (mol s-1 m-2)
- unit.in
character string with allowed values "energy", and "photon", or its alias "quantum"
- check.spectrum
logical indicating whether to sanity check input data, default is TRUE
- use.cached.mult
logical indicating whether multiplier values should be cached between calls
Value
a list of three numeric values giving the photoconversion rate (nu) and reaction rates (k1, k2).
References
Hayward, P. M. (1984) Determination of phytochrome parameters from radiation measurements. In Techniques in Photomorphogenesis, H. Smith and M. G. Holmes (eds). Academic Press, London, pp. 159-173. ISBN 0-12-652990-6.
Mancinelli, A.L. (1994) The physiology of phytochrome action. In Photomorphogenesis in plants, 2nd edition. R.E. Kendrick and G.H.M. Kronenberg, eds. Kluwer Academic Publishers, Dordrecht, pp. 211-269. ISBN 978-0-7923-2551-2 (print), 978-94-011-1884-2 (on-line). doi:10.1007/978-94-011-1884-2_10
Examples
library(photobiology)
trimmed.sun.spct <- trim_wl(sun.spct, range = c(300, 770))
with(trimmed.sun.spct, Phy_reaction_rates(w.length, s.e.irrad))
#> $k1
#> [1] 1.25935
#>
#> $k2
#> [1] 0.5833947
#>
#> $nu
#> [1] 1.842745
#>