発表論文

Modeling leaf CO2 assimilation and photosystem II photochemistry from chlorophyll fluorescence and the photochemical reflectance index

著者
Hikosaka K., Noda H.
雑誌名
Plant, Cell and Environment
DOI
10.1111/pce.13461
概要

We present a simple model to assess the quantum yield of photochemistry (ΦP) and CO2 assimilation rate from two parameters that are detectable by remote sensing: chlorophyll (chl) fluorescence and the photochemical reflectance index (PRI). ΦP is expressed as a simple function of the chl fluorescence yield (ΦF) and nonphotochemical quenching (NPQ): ΦP = 1–bΦF(1 + NPQ). Because NPQ is known to be related with PRI, ΦP can be remotely assessed from solar‐induced fluorescence and the PRI. The CO2 assimilation rate can be assessed from the estimated ΦP value with either the maximum carboxylation rate (Vcmax), the intercellular CO2 concentration (Ci), or parameters of the stomatal conductance model. The model was applied to experimental data obtained for Chenopodium album leaves under various environmental conditions and was able to successfully predict ΦF values and the CO2 assimilation rate. The present model will improve the accuracy of assessments of gas exchange rates and primary productivity by remote sensing.

この論文は2018年11月30日にプレスリリースされました。詳細は、http://www.nies.go.jp/whatsnew/20181130-2/20181130-2.htmlを参照して下さい。