Benzoxazolin-2-(3H)-one reduces photosynthetic activity and chlorophyll fluorescence in soybean

2017 ◽  
Vol 55 (2) ◽  
pp. 386-390 ◽  
Author(s):  
A. V. Parizotto ◽  
R. Marchiosi ◽  
G. A. Bubna ◽  
J. M. Bevilaqua ◽  
A. P. Ferro ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosynthetic Activity

scholarly journals SIFSpec: Measuring Solar-Induced Chlorophyll Fluorescence Observations for Remote Sensing of Photosynthesis

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 3009 ◽  
Author(s):  
Shanshan Du ◽  
Liangyun Liu ◽  
Xinjie Liu ◽  
Jian Guo ◽  
Jiaochan Hu ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Chlorophyll Fluorescence ◽  
Seasonal Variations ◽  
Photosynthetic Activity ◽  
Gross Primary Production ◽  
Atmospheric Correction ◽  
Gansu Province ◽  
Optical Measurements ◽  
Calibration Data ◽  
Flux Measurements

Solar-induced chlorophyll fluorescence (SIF) is regarded as a proxy for photosynthesis in terrestrial vegetation. Tower-based long-term observations of SIF are very important for gaining further insight into the ecosystem-specific seasonal dynamics of photosynthetic activity, including gross primary production (GPP). Here, we present the design and operation of the tower-based automated SIF measurement (SIFSpec) system. This system was developed with the aim of obtaining synchronous SIF observations and flux measurements across different terrestrial ecosystems, as well as to validate the increasing number of satellite SIF products using in situ measurements. Details of the system components, instrument installation, calibration, data collection, and processing are introduced. Atmospheric correction is also included in the data processing chain, which is important, but usually ignored for tower-based SIF measurements. Continuous measurements made across two growing cycles over maize at a Daman (DM) flux site (in Gansu province, China) demonstrate the reliable performance of SIF as an indicator for tracking the diurnal variations in photosynthetically active radiation (PAR) and seasonal variations in GPP. For the O2–A band in particular, a high correlation coefficient value of 0.81 is found between the SIF and seasonal variations of GPP. It is thus concluded that, in coordination with continuous eddy covariance (EC) flux measurements, automated and continuous SIF observations can provide a reliable approach for understanding the photosynthetic activity of the terrestrial ecosystem, and are also able to bridge the link between ground-based optical measurements and airborne or satellite remote sensing data.

Detection of photosynthetic activity under cadmium stress by measurement of the red and far-red chlorophyll fluorescence

2011 ◽  
Vol 32 (15) ◽  
pp. 4233-4248 ◽  
Author(s):  
Jaouhra Cherif ◽  
Najoua Derbel ◽  
Mohamed Nakkach ◽  
Chamseddine Mediouni ◽  
Hubertus Von Bergmann ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosynthetic Activity ◽  
Cadmium Stress

Contribution of Chlorophyll Fluorescence to the Reflectance of Leaves in Stressed Plants as Determined with the VIRAF-Spectrometer

1999 ◽  
Vol 54 (9-10) ◽  
pp. 849-857 ◽  
Author(s):  
Claus Buschmann ◽  
Hartmut K. Lichtenthaler
Keyword(s):  
Chlorophyll Fluorescence ◽  
Early Detection ◽  
Inflection Point ◽  
Photosynthetic Activity ◽  
Leaf Tissue ◽  
Blue Shift ◽  
Tissue Structure ◽  
Red Edge ◽  
Chl Fluorescence ◽  
Bean Leaves

Reflectance spectra allow the early detection of stressors causing differences in pigment content as well as changes of leaf tissue structure and photosynthetic activity. The reflectance decreased with increasing Chl content in greening bean leaves. In stressed leaves, in turn, the reflectance increased with decreasing Chl content. This also caused a shift of the red reflection rise (“red edge”) to shorter wavelengths (“blue shift”) associated with a blue shift of the inflection point of the red edge. The contribution of the red and far-red Chl fluorescence to the reflectance signal at the red edge of the spectrum and the shift of the wavelength position of the inflection point are demonstrated and discussed

Sign in / Sign up

Export Citation Format

Share Document