photobiologyPlants (version 0.6.1-1)

Pfr_Ptot_R_FR: Pr:Ptot ratio (photoequilibrium) from R:FR photon ratio.

Description

Calculation of Pfr:Ptot ratio for Type I Phytochrome from red:far-red photon ratio. "Exact" only for dichromatic irradiation, only approximate for R:FR ratio calculated from a broadband light source.

Usage

Pfr_Ptot_R_FR(R.FR)

Value

a single value or a vector of numeric values giving the Pr:Ptot dimensionless ratio

Arguments

R.FR

R:FR a single value or a vector of photon ratio (dimentionless) values

References

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

q_ratio

Other phytochrome-related functions and data: PHYs.mspct, Pfr_Ptot(), Phy_Sigma(), Phy_Sigma_FR(), Phy_Sigma_R(), Phy_reaction_rates()

Examples

Pfr_Ptot_R_FR(1.15)
Pfr_Ptot_R_FR(0.10)
Pfr_Ptot_R_FR(c(0.1,1.15,5.0,20.0))