为提高这类微生物对作物氮的贡献，第一种有效方法是导入特定的凝集素基因(lectin genes)，使微生物与作物联合关系更加紧密。
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plant lectin genes 植物凝集素基因
At that stage Dr Pusztai's research simply looked like a proof of principle checking that the techniques for transplanting and testing lectin genes worked, prior to exploring other, less harmful lectins as built-in insecticides for crops.
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