Chlorophyll change and spectral response of maize seedling under iron stress

摘要

Iron stress could pose a great threat to plant physiological processes and food security. Hyperspectral remote sensing is an important technology for stress monitoring of crop because of its rapid, nondestructive and macro-scale detection ability. In this study, maize seeding was taken as an example to study its chlorophyll change and spectral response under different iron concentration. The result showed that (1) with the increase of concentration of iron stress, chlorophyll content increased at first and then decreased and the maximum value appeared at 500mg/kg, and (2) selected spectral indices are positively correlative with chlorophyll content. Among the indices, RVI is the best index to evaluate chlorophyll content and then it is the right index to detect the iron stress of maize seedlings.