Table 1.

Volume (V), surface area (S) and the ratio of surface area to volume (S/V) of the rice mesophyll cells shown in Fig. 3.

Control	V (µm3)	S (µm2)	S/V (µm−1)	Salt stress	V (µm3)	S (µm2)	S/V (µm−1)
#1*	1284	799	0.62	#1	1165	812	0.70
#2	1644	995	0.61	#2	1046	746	0.71
#3	1067	694	0.65	#3	795	516	0.65
Mean	1332	830	0.63	Mean	1002	691	0.69
± s.d.	291	153	0.02	± s.d.	189	155	0.03

Means were compared between the control and NaCl-treated plants by Student’s t-test; V (P = 0.17), S (P = 0.33), S/V (P = 0.03).

*The original serial sectioning images of control plant #1 were the same as the images used in Oi et al. (2017). The values of V and S in the previous study were calculated without smoothing the 3-D reconstructed model, and V of the previous model was similar (1280) to the present value; however, S of the previous model was higher (1213) than that of the present study.