9Selli R, Sansavini S. Sugar, acid and pectin con- tent in relation to ripening and quality of peach and nectarine fruits [ J ]. Acta Horticul, 1995 (379) : 345 -358.
10Borsani J, Budde CO, Porrini L, Lauxmann MA, Lombardo VA, Murray R, Andreo CS, Drincovich MF, Lara MV. Carbon metabolism of peach fruit after harvest: changes in enzymes involved in or- ganic acid and sugar level modifications[ J ]. J Exp Bot, 2009, 60(6)- 1823-1837.