Fig. 3

a Score plots of partial least squares discriminant analysis (PLS-DA) and b loading plots obtained from metabolite data of 24-day-old shoots. PC1 and PC2 accounted for > 56.2% of the total variance. cont, Col-0; gcr1, gcr1 mutant; 1, Violaxanthin; 2, Lutein; 3, Zeaxanthin; 4, 13Z-β-Carotene; 5, α-Carotene; 6, β-Carotene; 7, 9Z-β-Carotene; 8, Chlorophyll a; 9, Chlorophyll b; 10, Pyruvic acid; 11, Lactic acid; 12, Serine; 13, Phosphoric acid; 14, Glycine; 15, Succinic acid; 16, Glyceric acid; 17, Fumaric acid; 18, β-Alanine; 19, Malic acid; 20, Pyroglutamic acid; 21, 4-Aminobutyric acid (GABA); 22, Threonic acid; 23, Glutamic acid; 24, Xylose; 25, Shikimic acid; 26, Citric acid; 27, Fructose; 28, Mannose; 29, Galactose; 30, Glucose; 31, Inositol; 32, Sinapinic acid; 33, Sucrose; 34, Raffinose; 35, Glucoraphanin; 36, Glucoalyssin; 37, Glucoibarin; 38, Glucoerucin; 39, Glucobrassicin; 40, Glucohirsutin; 41, 4-Methoxyglucobrassicin; 42, Neoglucobrassicin; 43, C20 (Eeicosanol); 44, C21 (Heneicosanol); 45, C22 (Docosanol); 46, C24 (Tetracosanol); 47, C26 (Hexacosanol); 48, C27 (Heptacosanol); 49, C28 (Octacosanol); 50, C30 (Triacontanol); 51, α-Tocopherol; 52, β-Tocopherol; 53, γ-Tocopherol; 54, Brassicasterol; 55, Campesterol; 56, Cholesterol; 57, Stigmasterol; 58, β-Sitosterol