Amino acids and organic acids detected in pineapple sweet orange phloem sap by GC-MS after MCF derivatization (n = 5).

All compounds were identified by matching their retention times and mass spectra with authentic standards. The percentages were calculated by dividing the concentration of each metabolite by the concentration of the total detected compounds then multiplying by 100. Values are given as mean ± SD (n = 5). Different letters indicate statistically significant differences between extraction methods (P