Fig. 4
Principal component analysis (PCA) for the first two PCA axes of (a) individuals and (b) variables (metabolites and precipitation patterns), observed under natural drought (ND) and amplified drought (AD) from 2016 to 2022, with n = 5 for each condition. AZ/VAZ, de-epoxidation of violaxanthin to antheraxanthin and zeaxanthin; Car/Chl, ratio of total carotenoid to total chlorophyll concentrations; Chl. tot, total chlorophyll (chl. a + b); der., derivatives; Precip. growing season, precipitation during the growing season (from 15th March to harvest date); Precip jan. to march, precipitation from 1st January to 15th March of leaf harvest year; Total precip. y-1, Total annual precipitation 1-year before sampling; Total precip. y-2, Total annual precipitation 2-years before sampling.
