Table 1.

N responses

Response	Treatment			Genes	Genes per class
	Nms	Nms+MSX	Nms+MSX+Glu
Class A, inorganic N	D	D	D	100	159
	I	I	I	59
Class B,	D	D	NC	30	48
inorganic N and Glu	I	I	NC	15
	D	D	I	3
Class C, internal Glu	D	NC	NC	194	334
	I	NC	NC	56
	NC	I	I	49
	NC	D	D	33
	D	I	I	2
Class D, external Glu	NC	NC	D	89	126
	NC	NC	I	37
Class E,	NC	I	NC	55	164
internal/external Glu	NC	D	NC	36
	D	NC	D	47
	I	NC	I	22
	I	D	I	3
	NC	D	I	1
Class F, opposite internal/	D	NC	I	2	3
external Glu	I	NC	D	1
Total					834

Patterns of expression based on their response to the Nms, Nms+MSX, and Nms+MSX+Glu treatments. Genes were categorized into six classes based on these patterns. D, decreased; I, induced; NC, no change.