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Hyperspectral reflectance as a tool to measure biochemical and physiological traits in wheat
- Source :
- Journal of Experimental Botany
- Publication Year :
- 2017
- Publisher :
- Oxford University Press (OUP), 2017.
-
Abstract
- Leaf hyperspectral reflectance can be used by the wheat physiology and breeding communities to rapidly estimate Rubisco activity, electron transport rate, leaf nitrogen, leaf dry mass per area, and relative chlorophyll content.<br />Improving photosynthesis to raise wheat yield potential has emerged as a major target for wheat physiologists. Photosynthesis-related traits, such as nitrogen per unit leaf area (Narea) and leaf dry mass per area (LMA), require laborious, destructive, laboratory-based methods, while physiological traits underpinning photosynthetic capacity, such as maximum Rubisco activity normalized to 25 °C (Vcmax25) and electron transport rate (J), require time-consuming gas exchange measurements. The aim of this study was to assess whether hyperspectral reflectance (350–2500 nm) can be used to rapidly estimate these traits on intact wheat leaves. Predictive models were constructed using gas exchange and hyperspectral reflectance data from 76 genotypes grown in glasshouses with different nitrogen levels and/or in the field under yield potential conditions. Models were developed using half of the observed data with the remainder used for validation, yielding correlation coefficients (R2 values) of 0.62 for Vcmax25, 0.7 for J, 0.81 for SPAD, 0.89 for LMA, and 0.93 for Narea, with bias
- Subjects :
- 0106 biological sciences
0301 basic medicine
Rubisco
Spectrophotometry, Infrared
Physiology
Triticum aestivum
Plant Science
Photosynthesis
01 natural sciences
Hyperspectral reflectance
03 medical and health sciences
leaf dry mass per area
RuBisCO activity
Dry weight
Electron transport rate
partial least squares
Partial least squares regression
Triticum
Mathematics
photosynthesis
leaf nitrogen
biology
fungi
RuBisCO
food and beverages
Carbon Dioxide
Research Papers
Photosynthetic capacity
Plant Leaves
030104 developmental biology
velocity of carboxylation
Agronomy
biology.protein
hyperspectral reflectance
Photosynthesis and Metabolism
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14602431 and 00220957
- Volume :
- 69
- Database :
- OpenAIRE
- Journal :
- Journal of Experimental Botany
- Accession number :
- edsair.doi.dedup.....b8b4abedb153e5edc3037cf566c59243