The study looked at how light stress affects the chloroplast pigment and taxol content in Taxus chinensis var.mairei leaves. Results showed that chlorophyll levels decreased initially but then gradually increased with prolonged stress. Carotenoid levels were lower at first but eventually surpassed the comparison. Taxol content was slightly lower initially but significantly increased after two weeks, reaching 1.5 times the comparison after three weeks. This suggests that light stress can boost taxol production in Taxus chinensis var.mairei leaves.