Measurement of δ<sup>1</sup>-Pyrroline-5-Carboxylic Acid in Plant Extracts for Physiological and Biochemical Studies.

The analysis of extracts spiked with known concentrations of the compound ( Figure 3 c) showed a highly significant correlation between P5C concentration in samples and its estimation ( p < 0.0001 in a Pearson two-tailed test) and allowed us to evaluate the recovery (about 85%) and to estimate the detection limit of the method (about 20–30 nmol g −1 FW under the experimental condition used).

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