The leaves were sampled for nutrient analysis at 0 d, 1 d, 3 d and
6 d after plant hormone treatments. Samples were placed on ice,
and immediately transported to the laboratory. For each sampling,
three independent replicates were taken for analysis. Some samples
were used as fresh for the analyses of chlorophyll, vitamin C and
total carotenoids, while the other samples were frozen by lyophilization
with a freeze dryer (VirTis Inc., New York, USA) and storage at
−20 °C for further analyses of total phenolics, antioxidant capacity
and glucosinolates