185-11 Spectral Index Response of Multiple Soybean Genotypes to Salinity Stress and Silicon Treatments

Session: New Advances and Voices in Geobiology (Posters)

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Soil salinity is known to interfere with plant growth by accumulating in plant tissues causing ionic stress reducing nutrient uptake. This is a growing concern in agriculture with over a million hectares of land at risk of salinization. It has been reported that many plants become more resistant to many environmental abiotic stresses after the application of silicon treatments. The aim of this study is to determine if there is any significant change in spectral response caused by silicon treatments in soybean plants across multiple genotypes. The independent variables in this study were the soybean plant genotype, silicon and salinity treatment while the dependent variables were the spectral indices calculated from the five bands of spectral data collected: Geen, red, red-edge, and near-infrared. Both the independent and dependent variables were used as components in a Principal Component Analysis (PCA) to determine each independent variable’s effect on the spectral response. The results of this study have found that the main determinants of the alterations in spectral response are caused by genotype and salinity treatments, but the effects of silicon treatment are statistically insignificant. This is a small part of a larger research project being conducted by a team of scientists attempting to determine the overall effectiveness of silicon treatments towards mitigating abiotic stress-related damage caused by soil salinity in a variety of soybean genotypes.

Geological Society of America Abstracts with Programs. Vol. 57, No. 6, 2025

doi: 10.1130/abs/2025AM-9149

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