Fissa, C. chinensis and P. massoniana under full sunlight was by 42.6%, 32.6% and 4.2% higher than that under shade, respectively. The UV-B absorption of cell wall-bound alkali extractable phenolics in leaves of C. 结果表明,在全日光强下植物叶片甲醇提取物的UV-B吸收能力较遮阴下的高,如藜蒴和锥树分别高出42.6%和32.6%,而马尾松仅高出4.2%。