Impact of AtNHX1, a vacuolar Na+/H+ antiporter, upon gene expression during short- and long-term salt stress in Arabidopsis thaliana

Table 1 Functional distribution of the 147 gene transcripts influenced by both salinity and AtNHX1.

Gene classification	# of transcripts influenced under each treatment¹						Distribution of decreased/increased transcripts in the nhx1mutant²
	All	Control	12 h	48 h	1wk	2wk	Down in nhx1	Up in nhx1
Unclassified	25	5	7	5	9	9	12	46
DNA binding	4	4	3	4	3	3	5	16
Membrane Transport	1	1	0	1	1	0	1	3
Metabolism/Energy	12	0	3	6	2	2	16	9
Structure/Growth	2	1	1	3	4	2	4	9
Signaling	6	0	0	1	4	2	4	9
Protein Processing	8	1	1	1	1	2	3	11
Total	58	12	15	21	24	20	45	103

¹ three transcripts were specifically influenced by AtNHX1 under two treatments (At4g17120, At5g47490 – both unclassified, significantly affected by Control and 12 h treatments – and At3g54810 – DNA binding, significantly affected by 1wk and 2wk treatments)
² one transcript (At3g54810) was up-regulated in one treatment (1wk) and down regulated in a second treatment (2wk)

ISSN: 1471-2229