Comparative transcriptomic characterization of aluminum, sodium chloride, cadmium and copper rhizotoxicities in Arabidopsis thaliana

Table 1 Classification by GO categories defined by TAIR for whole genome genes and for gene groups upregulated by rhizotoxic ions identified by a comparative microarray approach.

	Proportion of genes among GO categories (%)
GO slim category	Whole Genome	All Stressor	Al ion	NaCl	Cd ion	Cu ion
DNA or RNA binding
hydrolase activity	8.5	14.6	9.7	12.3	10.4	6.5
kinase activity	5.2	2.4	1.0	0.0	16.7**	5.2
nucleic acid binding	4.9	2.4	1.9	1.8	4.2	0.0
nucleotide binding	4.8	2.4	1.9	0.0	8.3	1.3
other binding	13.1	29.3**	16.5	17.5	12.5	16.9
other enzyme activity	10.0	9.8	14.6	15.8	6.3	23.4**
other molecular functions	3.8	4.9	3.9	3.5	4.2	6.5
protein binding	8.5	2.4	7.8	7.0	10.4	6.5
receptor binding or activity	0.9	2.4	1.9	0.0	4.2	0.0
structural molecule activity	2.0	0.0	0.0	0.0	2.1	0.0
transcription factor activity	6.5	7.3	5.8	24.6**	8.3	3.9
Transferase activity	7.5	9.8	16.5**	3.5	6.3	19.5**
Transporter activity	4.8	0.0	10.7**	1.8	8.3	0.0
unknown molecular functions	35.5	22.0	19.4*	26.3	12.5*	20.8

Genes were functionally categorized by GO slim defined by TAIR8. Percentage of the genes attributed to each GO slim category was calculated by the GO annotation tool in the TAIR database. Gene groups were identical to those grouped by Venn diagrams in Figure 3. ** and * indicate that the value in each group is significantly larger or smaller than whole genome, respectively (chi-square test, P < 0.05).

ISSN: 1471-2229