New developed models to estimate leaf chlorophyll content in durum wheat (Triticum durum Desf.) under semi-arid conditions

摘要

Leaf colors of a plant can be used to identify stress level due to its adaptation to environmental change. The objective of this study is to develop a new functions based on the RGB color model to estimate Chlorophyll levels in durum wheat under stressed conditions and compare it with non-destructive methods (SPAD 502 values). The results showed a significant correlation between Chlorophyll content estimated by RGB color models proposed [100-(R+B) and 100-(2R-B)] and Chlorophyll content measured by SPAD instrument (r = +0.72 and r = +0.77, respectively). In addition, chlorophyll content estimated by RED color model registered a significant correlation with Chlorophyll content measured by SPAD instrument (r = +0.72). The present results shown that, for practical purposes, the chlorophyll content of leaves can be estimated with sufficient accuracy using a portable video camera.