Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2014 Apr 19;369(1640):20130222. doi: 10.1098/rstb.2013.0222

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2014 The Author(s) Published by the Royal Society. All rights reserved.

PMC Copyright notice

Figure 1. — (a) Scheme of induction of chlorophyll fluorescence quenching in a wild-type Arabidopsis leaf as used in figure 2, with constant actinic light, or by eight stepwise increasing actinic light levels (figures 3–8): 90, 190, 285, 420, 620, 820, 1150 and 1500 μmol m⁻² s⁻¹. Vertical arrows on the left of the figure indicate application (AL on) and removal (AL off) of the actinic light treatment. P₁, P₂, P₃ are saturating pulses applied before (P₁) and during (P₂, P₃) the actinic light treatment. Short arrows on the right of the figure indicate levels of calculated () and actual () fluorescence in the dark. (b) The zoomed region of the fluorescence trace indicates the two brief dark breaks between the illumination steps where saturating pulses have been applied to enable calculation of the qP_d parameter (the equation is shown in the figure panel). The timing scheme for the dark breaks was: (AL off) (FR on)-(7 s)-(P)-(5 s)-(AL on)(FR off), where FR is far-red light; P is the saturating pulse.

Inline graphic — (a) Scheme of induction of chlorophyll fluorescence quenching in a wild-type Arabidopsis leaf as used in figure 2, with constant actinic light, or by eight stepwise increasing actinic light levels (figures 3–8): 90, 190, 285, 420, 620, 820, 1150 and 1500 μmol m⁻² s⁻¹. Vertical arrows on the left of the figure indicate application (AL on) and removal (AL off) of the actinic light treatment. P₁, P₂, P₃ are saturating pulses applied before (P₁) and during (P₂, P₃) the actinic light treatment. Short arrows on the right of the figure indicate levels of calculated () and actual () fluorescence in the dark. (b) The zoomed region of the fluorescence trace indicates the two brief dark breaks between the illumination steps where saturating pulses have been applied to enable calculation of the qP_d parameter (the equation is shown in the figure panel). The timing scheme for the dark breaks was: (AL off) (FR on)-(7 s)-(P)-(5 s)-(AL on)(FR off), where FR is far-red light; P is the saturating pulse.