Differential Gene Expression Responding to Low Phosphate Stress in Leaves and Roots of Maize by cDNA-SRAP

Table 2

Characterization of differential expression patterns under Pi stress in maize. The four lanes on the PAGE gel show the amplification of DEFs in the order of 0-, 3-, 5-, and 7-day treatments of LP. The nondifferential expression pattern (Class 14) is included for comparison.

DEF expression pattern		Distribution of DEFs
		Leaf	Root	Total
Class 1	Transient induced (3 days)	236 (9.2%)	168 (6.5%)	404 (15.7%)
	Transient induced (5 days)	118 (4.6%)	227 (8.8%)	345 (13.4%)
	Transient induced (7 days)	91 (3.5%)	175 (6.8%)	266 (10.3%)
Class 2	Rapidly switched off	235 (9.1%)	166 (6.5%)	401 (15.6%)
Class 3	Gradually switched off	144 (5.6%)	58 (2.3%)	202 (7.9%
Class 4	Induced	87 (3.4%)	95 (3.7%)	182 (7.1%)
Class 5	Switched off-induced	83 (3.2%)	129 (5.0%)	212 (8.2%)
Class 6	Induced-switched off-induced	25 (1.0%)	54 (2.1%)	79 (3.1%)
Class 7	Down	19 (0.7%)	28 (1.1%)	47 (1.8%)
Class 8	Down-up	13 (0.5%)	52 (2.0%)	65 (2.5%)
Class 9	Down-up-down	9 (0.4%)	8 (0.3%)	17 (0.7%)
Class 10	Up	23 (0.9%)	44 (1.7%)	67 (2.6%)
Class 11	Up-down	45 (1.8%)	29 (1.1%)	74 (2.9%)
Class 12	Up-down-up	13 (0.5%)	23 (0.9%)	36 (1.4%)
Class 13	Induced-switched off	67 (2.6%)	30 (1.2%)	97 (3.8%)
Class 14	Constitutive	33 (1.3%)	44 (1.7%)	77 (3.0%)
Total		1241 (48.3%)	1330 (51.7%)	2571 (100%)