Rate constants \(k_1\) Pr -> Pfr; \(k_2\) Pfr -> Pr; photoconversion rate \(\nu = k_1 + k_2\) 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 (\(k_1\), \(k_2\)).
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
See also
Other phytochrome-related functions and data:
PHYs.mspct,
Pfr_Ptot(),
Pfr_Ptot_R_FR(),
Phy_Sigma(),
Phy_Sigma_FR(),
Phy_Sigma_R()
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
#>