外来花蜜有助于植物保护植物常常用微量蜜源来“贿赂”那些对自己有益的昆虫，作为回报，友善的昆虫会帮助植物免于受害。这种现象一个多世纪以来已为科学界所共知，众所周知植物可以通过蚂蚁保护其不受其它昆虫的进攻从而达到共同受益的目的。科学工作者们把这种微量蜜源... Exotic nectar helps plants protect Plants often use tiny sources of honey to “bribe” those insects that are good for themselves, and in return, friendly insects help protect the plant from harm. This phenomenon has been known to the scientific community for more than a century. It is well-known that plants can achieve the goal of common benefit by ants protecting them from being attacked by other insects. Scientists put this trace honey source ...