. 2021 Feb 2;5:2. doi: 10.1038/s41538-021-00085-4

Table 1.

Differences in stable isotope ratios (δ¹³C, δ¹⁵N, δ¹⁸O, δ³⁴S) in shiitake mushrooms according to the geographical origin of the sawdust blocks and cultivation method (log versus sawdust block).

Cultivation method	δ¹³C	δ¹⁵N	δ¹⁸O	δ³⁴S
Log (n = 75)	−26.01 ± 0.89^B	−4.06 ± 1.60^B	24.27 ± 0.83^A	5.03 ±± 1.63^B
Sawdust block (n = 279)	−24.28 ± 0.93^A	0.08 ± 1.83^A	22.66 ± 1.29^B	11.94 ± 7.15^A
LSD_0.05	0.24	0.46	0.31	1.64
Sawdust block origin
Korean origin (n = 125)	−24.95 ± 0.62^C	1.70 ± 1.35^A	22.15 ± 1.34^C	7.85 ± 4.69^C
Chinese inoculated (n = 94)^a	−23.54 ± 0.68^A	−1.20 ± 0.83^B	23.34 ± 1.13^A	16.77 ± 7.98^A
Chinese origin (n = 60)	−24.02 ± 0.83^B	−1.27 ± 0.96^B	22.69 ± 0.86^B	12.91 ± 4.55^B
LSD p = _0.05^b	0.21	0.34	0.37	1.83

^aThe mean δ¹⁸O for shiitake mushrooms produced via the Chinese inoculated sawdust block method was based on the number of samples (n = 93).

^bThe value of LSD_p = 0.05 is meant the results of the least significant difference test with the general linear model, which was performed at the 0.05 probability level.

^A–CData with different superscript capital letters are significantly different (p < 0.05) according to the LSD test.