Population Dynamics of Ralstonia solanacearum Isolates in Root Systems of Various Crops

抄録

For monitoring behavior of wilt bacteria Ralstonia solanacearum strains (biovars 1, 2, 3) in root systems of various plants, multi-antibiotics-resistant strains were induced and used as inoculants, By tracing of the wilt bacteria, marked results were obtained. The population changed dynamically depending upon plant species tested. Distinct decrease of the wilt bacteria was observed in root systems of lettuce, rice, onion, welsh onion, maize, cucumber and soybean, The population of each biovar varied obviously during the plant cultivation for 60 days. Biovar 2, generally was less frequently present except for the cases of zucchini and cowpea. Though biovars are the groups based on the utilization of carbohydrates, correlation with plant species in affinity was partly indicated in present studies.