Hunter C S, Neill S J
Bristol Polytechnic, Frenchay, Bristol, UK.
Methods Mol Biol. 1990;6:279-88. doi: 10.1385/0-89603-161-6:279.
The bacterial genus Agrobucterium includes two species of considerable interest to plant physiologists and pathologists alike. Infection by virulent strains of A. tumefaciens induces the formation of tumors and infection by A. rhizogenes the proliferation of roots in a wide range of dicotyledenous plants: crown-gall and hairy root diseases are not naturally recorded in monocotyledenous plants (1). Invasion of plant tissues by these free-living soil bacteria usually occurs at a wound site-possibly caused by insect or mechanical damage; nonvirulent strains of the bacteria may invade the plant, but only virulent strains give rise to symptoms of disease.
土壤杆菌属细菌包括两个种，它们对植物生理学家和病理学家都具有相当大的研究价值。根癌土壤杆菌的致病菌株感染会诱导肿瘤形成，发根土壤杆菌感染则会使多种双子叶植物的根增生：冠瘿病和毛根病在单子叶植物中未发现自然病例（1）。这些自由生活的土壤细菌通常通过伤口部位侵入植物组织，伤口可能由昆虫或机械损伤造成；该细菌的无毒菌株可能会侵入植物，但只有致病菌株会引发疾病症状。
