Fig. 9

Heat map illustrates the correlation analysis between different pairs of Brunfelsia grandiflora traits. Cha: chlorophyll a, Chb: chlorophyll b, Caro: carotenoids, Anth: anthocyanin, Flav: flavonoids, Phen: phenolics, DPPH: total antioxidant activity, N: nitrogen, P: phosphorus, K: potassium, Si: silicon, Mg: magnesium, Fe: iron, PH: plant height, BNP: branches number plant− 1, LNP: leaves number plant− 1, LA: leaf area and FNP: flower number plant− 1. ns: not significant, *: significant at P < 0.05, **: significant at P < 0.01 and ***: significant at P < 0.001.