Table I.

Effect of sh1 or sus1 mutation on post-submergence survival and growth of maize seedlings

Treatment	Survival			Grams of Fresh Wt per Seedling
	NMa	sh1	sus1	NMb		sh1
				Root	Shoot	Root	Shoot
		%
Aerobic	100 ± 0	95 ± 3	94 ± 5	0.43 ± 0.05	2.09 ± 0.10	0.45 ± 0.04	1.72 ± 0.05
24 h Subb	94 ± 3	88 ± 17	93 ± 9	0.45 ± 0.05	1.35 ± 0.25	0.51 ± 0.05	1.22 ± 0.13
48 h Sub	76 ± 8	80 ± 9	29 ± 19	0.22 ± 0.09	0.68 ± 0.19	0.41 ± 0.06	0.89 ± 0.07
72 h Sub	15 ± 10	72 ± 9	1 ± 1	0.03  ± 0.01c	0.42 ± 0.07	0.13 ± 0.02	0.54 ± 0.04

The survival data (means ± se) are 10 seedlings of each genotype (pooled from three different backgrounds) at every time point. Each genotype was tested at least twice. The growth data (means ± se) is shown only for the non-mutant and sh1 genotypes. Under anoxia, no significant difference was observed in the root and shoot growth patterns between non-mutant and sus1 seedlings.

^a NM, Non-mutant. 

^b Sub, submerged. 

^c The 72-h submerged non-mutant seedlings lost their primary roots during post-submergence growth and had only small seminal roots.