photobiologyPlants (version 0.5.0)

Phy_reaction_rates: Phytochrome reaction rates

Description

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
)

Value

a list of three numeric values giving the photoconversion rate (\(\nu\)) and reaction rates (\(k_1\), \(k_2\)).

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

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). tools:::Rd_expr_doi("10.1007/978-94-011-1884-2_10")

See Also

photon_ratio and energy_ratio

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))