Radiation use efficiency, chlorophyll fluorescence, and reflectance indices associated with ontogenic changes in water-limited Chenopodium quinoa leaves - IRD - Institut de recherche pour le développement Access content directly
Journal Articles Photosynthetica Year : 2002

Radiation use efficiency, chlorophyll fluorescence, and reflectance indices associated with ontogenic changes in water-limited Chenopodium quinoa leaves

T. Winkel
M Methy
  • Function : Author
F Thenot
  • Function : Author

Abstract

Net photosynthetic rate, radiation use efficiency, chlorophyll (Chl) fluorescence, photochemical reflectance index (PRI), and leaf water potential were measured during a 25-<1 period of progressive water deficit in quinoa plants grown in a glasshouse in order to examine effects of water stress and ontogeny. All physiological parameters except Fv/F m were sensitive to water stress. Ontogenic variations did not exist in Fv/F m and leaf water potential, and were moderate to high in the other parameters. The complete recovery of photosynthetic parameters after re-irrigation was related with the stability in FyIF m. PRI showed significant correlation with predawn leaf water potential, Fm', and midday FyIF m. Thus PRI and Chl fluorescence may help in assessing physiological changes in quinoa plants across different developmental stages and water status.
Fichier principal
Vignette du fichier
Winkel#3038-photosynthetica.pdf (575.57 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

ird-03373214 , version 1 (11-10-2021)

Identifiers

Cite

T. Winkel, M Methy, F Thenot. Radiation use efficiency, chlorophyll fluorescence, and reflectance indices associated with ontogenic changes in water-limited Chenopodium quinoa leaves. Photosynthetica, 2002, 40 (2), pp.227-232. ⟨10.1023/A:1021345724248⟩. ⟨ird-03373214⟩
75 View
62 Download

Altmetric

Share

Gmail Facebook X LinkedIn More