Thermal Imaging Reliability for Estimating Grain Yield and Carbon Isotope Discrimination in Wheat Genotypes: Importance of the Environmental Conditions
| Autor: | Sebastián Romero-Bravo, Alejandro del Pozo, Ana María Méndez-Espinoza, Luis González-Martínez, Dalma Castillo, Miguel Garriga, Alejandro Escobar, Gustavo A. Lobos, Iván Matus, Daniel Sepulveda, Félix Estrada, Carlos Poblete-Echeverría |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Canopy Irrigation phenotyping Genotype Vapour Pressure Deficit phenotype Climate Triticum aestivum chemistry.chemical_element Nerve Tissue Proteins lcsh:Chemical technology 01 natural sciences Biochemistry Article Analytical Chemistry Degree day Crop 03 medical and health sciences Soil remote sensing stress Image Processing Computer-Assisted lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation Triticum 030304 developmental biology water deficit 0303 health sciences Carbon Isotopes δ13C Temperature food and beverages Water phenomics Zebrafish Proteins Atomic and Molecular Physics and Optics Carbon Agronomy chemistry Soil water infrared Environmental science Edible Grain 010606 plant biology & botany |
| Zdroj: | Sensors Volume 19 Issue 12 Sensors (Basel, Switzerland) Sensors, Vol 19, Iss 12, p 2676 (2019) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s19122676 |
| Popis: | Canopy temperature (Tc) by thermal imaging is a useful tool to study plant water status and estimate other crop traits. This work seeks to estimate grain yield (GY) and carbon discrimination (&Delta 13C) from stress degree day (SDD = Tc &minus air temperature, Ta), considering the effect of a number of environmental variables such as the averages of the maximum vapor pressure deficit (VPDmax) and the ambient temperature (Tmax), and the soil water content (SWC). For this, a set of 384 and a subset of 16 genotypes of spring bread wheat were evaluated in two Mediterranean-climate sites under water stress (WS) and full irrigation (FI) conditions, in 2011 and 2012, and 2014 and 2015, respectively. The relationship between the GY of the 384 wheat genotypes and SDD was negative and highly significant in 2011 (r2 = 0.52 to 0.68), but not significant in 2012 (r2 = 0.03 to 0.12). Under WS, the average GY, &Delta 13C, and SDD of wheat genotypes growing in ten environments were more associated with changes in VPDmax and Tmax than with the SWC. Therefore, the amount of water available to the plant is not enough information to assume that a particular genotype is experiencing a stress condition. |
| Databáze: | OpenAIRE |
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