Table 1.

Analysis of variance (ANOVA) subjected to callus induction, partial air desiccation and NaCl treatments in 3 rice genotypes

Stress	Subject of ANOVA (Data source)	Source of variation	DF	Mean sum of square
—	Callus Induction (CI) (Fig. 1)	Genotype (G)	2	442.476**
		Media (M)	7	2.858**
		G × M	14	—
Salt induced stress	Viability of callus (VC) (Table 1)	Genotype (G)	2	7422.85**
		Salt concentration (SC)	4	8543.69**
		Callus culture period (CCP)	3	193.27**
		G × SC	8	581.68**
		G × CCP	6	4.36NS
		SC × CCP	12	7.27*NS
		G × SC × CCP	24	8.48
	Relative growth rate (RGR) (Fig. 3A)	Genotype (G)	2	1.741**
		Salt concentration (SC)	4	9.414**
		G × S	8	0.132
	Tolerance index (TI) (Fig. 3B)	Genotype (G)	2	0.039**
		Salt concentration (SC)	4	0.453**
		G × S	8	0.005
	Relative water content (RWC) (Fig. 3C)	Genotype (G)	2	3.327**
		Salt concentration (SC)	4	38.644**
		G × SC	8	2.119
Partial air desiccation stress	Plant regeneration (PR) (Table 2)	Genotype (G)	2	604.34**
		Age of callus (AC)	3	803.94**
		Partial air desiccation (PAD)	4	686.17**
		G × AC	6	18.45NS
		G × PAD	8	45.93NS
		AC × PAD	12	124.71*
		G × AC × PAD	24	35.09

^** = Significant at P < 0.01, * = Significant at P < 0.05, NS = Non-significant.