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. 2021 Oct 21;21:480. doi: 10.1186/s12870-021-03259-0

Fig. 1.

Fig. 1

Physiological responses of the two accessions under low N conditions. The soluble protein content (A), the free amino acid content (B), the starch content (C) and the sugar content (D) of roots were measured. Lowercase letters represent significant differences between the accessions and between plants that received different N treatments (P < 0.05)