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从污泥中分离得到光合细菌球形红假单胞菌P_4株。实验结果表明喷洒P_4菌株培养液能够提高蚕豆与苋色藜植株抵抗黄瓜花叶病毒(CMV)、香石竹斑驳病毒(CaMV)感染的能力。实验还进一步表明,这种作用是由光合细菌菌体内的物质产生的。研究结果显示光合细菌P_4株具有诱导植物抗病毒活性的作用。
Photosynthetic bacteria Rhodobacter sphaeroides P_4 were isolated from the sludge. The results showed that spraying P 4 strain could increase the resistance of Vicia faba and amaranth to Cucumber mosaic virus (CMV) and carnation mottle virus (CaMV) infection. Experiments further show that this effect is produced by the photosynthetic bacteria in the body of the material. The results showed that photosynthetic bacteria P_4 strain has the effect of inducing plant antiviral activity.