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The content of ascorbic acid in (A) leaf and (B) roots of sugar beet plants. The plants were grown in soil amended with or without Zn and B. Samples were collected 7 days after inoculation of A. rolfsii. The data are presented as the means of the treatment ± standard error. Data labeled with the same letter are not significantly different based on the DMRT test at p < 0.05.
