Table 1.

Aerenchyma formation (% aerenchyma/cortex) in accessions of O. glumaepatula, O. rufipogon, and rice (cv. Nipponbare) under aerated or stagnant conditions.

Species	Accession	Aerenchyma Formation (% aerenchyma/cotex)
		Aerated	Stagnant	t-Test
O. glumaepatula	W2165	48 ± 3 c	46 ± 5 A	n.s.
	W2149	32 ± 5 a,b	52 ± 4 A	*
	W1183	21 ± 1 a	49 ± 6 A	*
O. rufipogon	W1962	38 ± 2 b,c	52 ± 2 A	*
O. sativa	Nipponbare	48 ± 2 c	64 ± 4 A	*

Aerenchyma formation (% aerenchyma/cortex) at 100 mm from apex of 115–120 mm-length roots. Asterisks denote significant differences between means of aerated and stagnant conditions (two-sample t-test, *: p < 0.05). n.s.: not significant. Different lower-case and upper-case letters denote significant differences among accessions under aerated and stagnant conditions, respectively (p < 0.05, one-way analysis of variance (ANOVA) and Tukey’s honest significant difference (HSD) for multiple comparisons). Plants were grown in aerated nutrient solution for eight days and then transferred to deoxygenated stagnant 0.1% agar solution or continued aerated solution for 13–15 days. Mean ± SE. n = 3 or 4.