Fig. 2

a PLS-DA score plots and b loading plots obtained from 68 metabolites of 10-day-old seedlings of Arabidopsis thaliana. PC1 and PC2 accounted for > 67.8% 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, 15-Z-Phytoene; 9, all-E-Phytoene; 10, Chlorophyll a; 11, Chlorophyll b; 12, Lactic acid; 13, Alanine; 14, Valine; 15, Urea; 16, Serine; 17, Ethanolamine; 18, Phosphoric acid; 19, Leucine; 20, Isoleucine; 21, Glycine; 22, Succinic acid; 23, Glyceric acid; 24, Fumaric acid; 25, Threonine; 26, β-Alanine; 27, Malic acid; 28, Aspartic acid; 29, Methionine; 30, Pyroglutamic acid; 31, 4-Aminobutyric acid (GABA); 32, Glutamic acid; 33, Phenylalanine; 34, Asparagine; 35, Glutamine; 36, Citric acid; 37, Fructose; 38, Galactose; 39, Glucose; 40, Inositol; 41, Tryptophan; 42, Sinapinic acid; 43, Sucrose; 44, Glucoraphanin; 45, Glucoalyssin; 46, Glucoibarin; 47, Glucoerucin; 48, Glucobrassicin; 49, Glucohirsutin; 50, 4-Methoxyglucobrassicin; 51, Neoglucobrassicin; 52, C20 (Eicosanol); 53, C21 (Heneicosanol); 54, C22 (Docosanol); 55, C23 (Tricosanol); 56, C24 (Tetracosanol); 57, C26 (Hexacosanol); 58, C27 (Heptacosanol); 59, C28 (Octacosanol); 60, C30 (Triacontanol); 61, α-Tocopherol; 62, β-Tocopherol; 63, γ-Tocopherol; 64, Brassicasterol; 65, Campesterol; 66, Cholesterol; 67, Stigmasterol; 68, β-Sitosterol