The root length and the number of lateral root of lettuce and starriness were significantly inhibited by the root exudates of lily cv.Pollyanna, and the other targets were not significantly inhibited.

• 波利安娜百合根系分泌物对莴苣和满天星的根长和侧根数的抑制作用均达到显著水平（这可能是根系与化感物质直接接触所致），但对这2种受体植物其他指标的抑制作用均未达显著水平；