Fig. 6From: Alleviation of iron deficiency in pear by ammonium nitrate and nitric oxideEffects of exogenous NH4NO3 and cPTIO application on SPAD value and FCR activity of pear with iron deficiency. A The growth phenotypes. B SPAD value. C The FCR activity data are expressed as the mean ± SD (n = 6). Different letters indicate significant differences at P < 0.05 (LSD test)Back to article page