Sucrose was measured using a Waters 600E high-performance liquid chromatograph (Millipore, UK) [28]. A carbohydrate column and a 2410 refractive index monitor were used. The mobile phase used was 75% acetonitrile and ultra water (75:25). The mobile rate and temperature of the column were set at 1.0 mL min−1 and 35 ◦C, respectively. Water Millennium software (Millipore, UK) was used to manage the data.