防御物质

昆虫可以窃听植物分子信号（水杨酸、茉莉酮酸），通过P450的诱导机制增强自身对植物防御物质的反防御能力。

The ability of the insect Helicoverpa zea to activate P450 genes to protect itself against toxins produced by host plant through eavesdropping plant defence signals ( jasmonate and salicylate ) was documented .

有一些昆虫通过吃掉其他昆虫取得防御物质。

Some insects obtain defensive materials by eating other insects .

植物多酚是植物体内重要的次生代谢物，是唯一的分子防御物质，具有重要的生态作用。

Plant polyphenols is an important group of secondary metabolites .

不结球白菜感染霜霉病菌后防御物质及酶的变化

Changes of protective substances and enzymes in non-heading Chinese cabbage after infection by downy mildew

浅谈一些昆虫的防御物质

Defensive Substances in some Insects

细胞谷胱甘肽（GSH）还原能力是细胞最重要的解毒机构，也是细胞中防御毒性物质最关键因素。

Glutathione reduction ability is most important one of the detoxification mecha-nism in living cells , also is the most important defensive System .

为了克服生产实际中用石灰调节鳗塘水体酸性的弊端，利用石灰石石屑防御酸性物质入侵，效果特别好。

In order to overcome the abuse of adjusting acidity of eel pond of acid sulfate soil with lime , we use limestone powder to prevent the acid matter from invading the pond water .

C6挥发物是植物对害虫进行间接防御的关键物质之一，而植物体内的脂氢过氧化物裂解酶（hydroperoxidelyase，HPL）是其合成的关键酶。

C6-Volatile is one of the key material which is indirect defense against pests in the plants , fatty acid hydroperoxide lyase is a key enzyme in its synthesis in plants .

采前苯丙噻重氮（BTH）处理对厚皮甜瓜果实防御酶及抗性物质的诱导

Defense enzymes and disease resistance substances induction in muskmelons by preharvest benzothiazole ( BTH ) spraying

植物的诱导抗虫基因可分为3类，即防御基因、防御物质合成基因和信号途径基因，综述了这3类基因的种类及其功能。

The induced herbivore-resistant genes are classified into three categories , which are defense genes , defense compound synthesis genes and signal pathway genes .

它以可溶性和膜结合两种形态存在于植物细胞内，可催化多种化学反应，在防御植物免受有害物质侵害方面具有重要作用。

They are found in various subcellular locations in soluble and membrane bound forms and play an important role in preventing the plants from injury of harmful substances by catalyzing many kinds of reaction .