研究表明，糖苷生物碱具有保护植物防御微生物、昆虫等天敌侵袭的作用，是植物的天然防御物质。
Some investigation have indicated that glycoalkaloids must have been evolved in nature to protect plants against bacteria, fungi, insects, and animals.
顺势疗法可追溯到18世纪，其依据的理念是，导致疾病症状的物质能够促使人体防御机能抑制病症。
Homeopathy, which dates to the 18th century, rests on the notion that substances that cause the same symptoms as an illness can prompt the body's defenses to overpower that illness.
除了抗生素，许多被称为宿主防御增效剂(HDPs)、蛋白束多聚糖或多糖蛋白复合物（PSPCs）的物质已经从蕈类中分离出来。
Besides antibioties, a large number of subtances known as Host Defence Potentiators(HDPs), Protein bound Polysaccharide or Polysaccharide-Protein Complexes(PSPCs) have been isolated from mushrooms.
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