2. Materials and methods
2.1. Plant material
Lotus roots (N. nucifera Gaertn. cv. Taikong Lian III) were purchased
from a local wholesale market at Nanchang, China. They
were selected for uniformity of size and ground color, and freedom
from defects and mechanical damage. Before treatment, lotus roots
were stored at 4 C for 24 h and then washed with tap water,