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. 2021 May 27;21:239. doi: 10.1186/s12870-021-03028-z

Fig. 5.

Fig. 5

Characteristics of leaf net photosynthetic rate (Pn, a), stomatal conductance (gs, b), intercellular CO2 concentration (Ci, c), transpiration rate (Tr, d), photosynthetic water-use efficiency (PWUE, e) and SPAD value (f, n = 40) in citrus seedlings grown under conditions of Mg deficiency (-Mg) and sufficiency (+ Mg). Data are presented as mean ± standard deviation (n = 13). Different letters represent significant differences among organs between the Mg treatment groups at P < 0.05