Created on January 26, 2022
- Tolerant to metal-induced stress ➔ phytostabilizing species
- Already highlighted correlation between quantity of metals in the soil, in the plant and in the fruits.
84 vines treated in total
- Vines in a controlled environment: allows conditions (same water, soil, nutiments conditions)
- 5 types of treatments :
- Control: no treatment
- MAL : metal intake according to the maximum legal dose in Iran
- L2 to L4 : metal content 2, 3 and 4 times greater than the legal maximum
Sampling of 5 leaves per pot to measure their spectra
- Dried 24 hours
- Digested with acid
- Measurement of the metal concentration (according to the original treatment) by a Graphite-Furnace Atomic Absorption Spectrophotometer
Main difference in the VIS region: plant pigments have an effect on the absorption of the plant.
Using the PLS method, specific wavelengths are isolated for each metal.
Modeling the relationship between best wavelengths or spectral index and metal concentration in leaves.
- Vine is a good model to observe the effect of metals on plants.
- Response of the vine is different from that of other plants (rice in particular).
- SVM algorithm is the most adapted, and the most flexible by nature (combination of linear and non-linear functions).
- Spectral indices are often more accurate than wavelengths.