中文摘要：

用茉莉酸（JA）处理三叶橡胶，分别在JA处理1、24、48、72、96、120h后，分析三叶橡胶光合作用能力和抗氧化系统活性以及单萜类物质的变化。结果发现，与对照相比，用JA处理的三叶橡胶的叶片最大净光舍速率和气孔导度显著下降，光系统Ⅱ潜在最大光化学效率和内在光化学效率也明显下降。光合作用能力的下降可能是由于JA处理导致的叶绿素、类胡萝卜素、可溶性蛋白质含量逐渐下降的结果。然而，JA处理却导致过氧化氢含量逐渐增加，过氧化氢含量的增加激活了抗氧化系统，结果导致超氧化物歧化酶、过氧化氢酶、过氧化物酶活性上升，抗坏血酸-谷胱甘肽循环加强。但是，α-蒎烯、β-蒎烯、桧烯以及总单萜这些潜在的抗氧化物的含量却先增加，而后逐渐下降。

英文摘要：

Jasmonic acid （JA） were sprayed on the leaves of Hevea brasiliensis, and the photosynthetic capacities, photosynthetic pigments, and antioxidant metabolites as well as activities of antioxidant enzymes after treated by JA for 1,24, 48, 72, 96, 120 h were measured. The results revealed that JA led to the decline in maximum net photosynthetic rate, stomata conductance, and photochemical efficiency of photosystem Ⅱ. The decline in photosynthetic capacity might be resulted from the JA-induced decreases in the contents of chlorophyll, carotenoids, and total soluble protein. Whereas, the levels of hydrogen peroxide （H2O2） were increased after JA treatment. Meanwhile, the increases in H2O2 levels could activate the antioxidant system. Therefore, the activities of superoxide dismutase, catalase, and guaiacol peroxidase were increased, and the cycles of ascrobate-glutathione were enhanced after the JA-induced increase in H2O2 levels. However, the potential antioxidants of α-pinene, β-pinene, sabinene, and total monoterpene were initially increased, and then decreased.