Fig. 2From: Ascorbic acid synthesis and transportation capacity in old laying hens and the effects of dietary supplementation with ascorbic acidAA contents in different tissues. a–f Total AA, AA, and DHA contents in the kidney, liver, shell gland, ovary, spleen and brain of the old and young layers in Exp. 1. *means P < 0.05; **means P < 0.01. g Effects of dietary supplementation of AA on splenic total AA, AA, and DHA concentrations of old laying hens in Exp. 2. Within each panel, means without a common letter differ at P < 0.05Back to article page