Light absorption by anthocyanins in juvenile, stressed, and senescing leaves.

Highly significant linear correlations between ( D 550 – D 700 ) and AnC content ( r 2 ranging from 0.94 to 0.87 in A. platanoides and P. quinquefolia , respectively) were found in the leaves of all species studied allowing non-destructive assessment of AnC with RMSE from 4.1–5.9 nmol cm −2 in their content up to 50 nmol cm −2 ( Table 2 ).

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