TABLE 2.

Significantly (adjusted p-value ≤ 0.5) enriched KEGG pathways in Mace, Spitfire, and Volcani under nitrogen stress in second leaf tissue.

Cultivar	KEGG pathway	KEGG id
Mace	Zeatin biosynthesis	osa00908
	Arginine and proline metabolism	osa00330
	Sulfur metabolism	osa00920
Spitfire	Plant–pathogen interaction	osa04626
	Carbon metabolism	osa01200
	Glyoxylate and dicarboxylate metabolism	osa00630
	Photosynthesis	osa00195
	Glycine, serine, and threonine metabolism	osa00260
	Carbon fixation in photosynthetic organisms	osa00710
	Glycolysis/gluconeogenesis	osa00010
	Fructose and mannose metabolism	osa00051
	Alanine, aspartate, and glutamate metabolism	osa00250
	Taurine and hypotaurine metabolism	osa00430
	Pentose phosphate pathway	osa00030
	One carbon pool by folate	osa00670
	Porphyrin and chlorophyll metabolism	osa00860
	Histidine metabolism	osa00340
	Ascorbate and aldarate metabolism	osa00053
Volcani	Beta-alanine metabolism	osa00410
	Terpenoid backbone biosynthesis	osa00900
	Ubiquinone and other terpenoid-quinone biosynthesis	osa00130
	Tryptophan metabolism	osa00380
	Butanoate metabolism	osa00400
	Phenylalanine, tyrosine, and tryptophan biosynthesis	osa00651
Mace–Spitfire	MAPK signaling pathway—plant	osa4016
Mace–Volcani	Stilbenoid, diarylheptanoid, and gingerol biosynthesis	osa00945
	Plant hormone signal transduction	osa04075
	Phenylalanine metabolism	osa00360
	Galactose metabolism	osa00052
	ABC transporters	osa02010
	Glutathione metabolism	osa00480
Spitfire–Volcani	Biosynthesis of amino acids	osa01230
	Photosynthesis-antenna proteins	osa00196
	Circadian rhythm—plant	osa04712
	Cyanoamino acid metabolism	osa00460
	Cysteine and methionine metabolism	osa00270
Mace–Spitfire–Volcani	Phenylpropanoid biosynthesis	osa00940
	Biosynthesis of secondary metabolites	osa01110
	Flavonoid biosynthesis	osa00941
	Metabolic pathways	osa01100
	Starch and sucrose metabolism	osa00500