The pigment content of Gentiana straminea in Haibei was lower than in Xining,but the activities of antioxidases were higher than in Xining,it was responsived for protecting photosynthetic apparatus.

• 高海拔的海北麻花艽植物光合色素的含量较低但具有较高的抗氧化酶的活性，保护了光合机构免遭破坏。