Fig 1. Variation in organic acids content in Gaocheng (‘GC’) and Satsuma mandarin (‘SM’) fruits during development.

(A) ‘GC’ and ‘SM’ fruits at different developmental stages. The bar indicates 5cm. (B) Titratable acidity (TA) and main organic acids at each developmental stage of ‘GC’ and ‘SM’ fruits. The error bars represent the standard errors. The patterns and absolute contents of citrate indicate that it made a dominant contribution to the different acidity of ‘GC’ and ‘SM’ fruit. LSDs represent least significant differences at the 0.05 level.