Elevated Ozone Deteriorates Grain Quality of Japonica Rice cv. Koshihikari, Even if it Does Not Cause Yield Reduction

Rice

Table 3 Pasting properties by RVA of the flours in two rice cultivars grown under AA and O₃

		Maximum viscosity (cP)	Minumum viscosity (cP)	Breakdown (cP)	Final viscosity (cP)	Setback (cP)	Peak Time (min)	Pasting Temp (°C)
Kos	AA	3511 ± 39	1636 ± 43	1875 ± 12	2577 ± 37	941 ± 13	6.24 ± 0.04	66.4 ± 0.03
	O₃	3605 ± 15	1633 ± 23	1972 ± 21	2542 ± 22	909 ± 19	6.26 ± 0.01	66.4 ± 0.04
		*	ns	**	ns	ns	ns	ns
Kas	AA	2429 ± 53	1334 ± 42	1095 ± 12	2932 ± 54	1597 ± 14	6.12 ± 0.02	70.9 ± 0.25
	O₃	2307 ± 41	1455 ± 40	852 ± 19	2943 ± 44	1488 ± 11	6.33 ± 0.03	71.8 ± 0.15
		ns	ns	***	ns	***	***	*

Values show mean ± SE (n = 3). Asterisks denote significant differences between ambient air (AA) and elevated ozone (O₃) treatment (Student’s t-test, *P < 0.1, **P < 0.05 and ***P < 0.01). ns not significant, Kos Koshihikari, Kas Kasalath