Aims

Xanthomonas campestris pv. campestris (Xcc) survival was evaluated in the phyllosphere and rhizosphere of 20 crop species, as well as in the rhizosphere of cabbage cultivated in six soil types.

Methods

The crops aerial parts were inoculated, and the rhizosphere soil was infested with bacterial suspension (10⁷ CFU.mL⁻¹) of 3098C Xcc strain, which is rifampicin-resistant and pathogenic to brassica plants. Xcc recovery from the samples was performed in a semi-selective culture medium.

Results

The highest average survival periods of Xcc in the phyllosphere were obtained from cabbage (70 days), tomato (67 days), wheat and pumpkin (63 days), black oat and radish (56 days) and sweet pepper (49 days). Low Xcc survival occurred in the rhizosphere of most crops evaluated when compared to the soil in the absence of plants. The highest average period of survival in the rhizosphere was observed for cabbage (53 days). Survival periods in lettuce, pumpkin, wheat and mustard ranged from 21 to 28 days. In the rhizosphere of cabbage cultivated in six soils, survival periods ranged from 8 to 17 days.

Conclusions

Sunflower, carrot, zucchini, spinach, sunn hemp, sorghum, maize and chive are recommended for rotating systems with brassicas because Xcc showed low survival in the phyllosphere and rhizosphere of these crops.

中文翻译：

---

Xanthomonas campestris pv。的生存。作物的根际和根际的樟脑

目的

Xanthomonas campestris pv。在20种农作物的根际和根际中，以及在6种土壤类型中种植的甘蓝的根际中，均对campestris（Xcc）的存活进行了评估。

方法

接种作物的地上部分，并用 3098C Xcc菌株的细菌悬浮液（10 ⁷ CFU.mL ^-1）侵染根际土壤，该菌株对利福平具有抗性并且对芸苔属植物具有致病性。在半选择性培养基中从样品中回收Xcc。

结果

Xcc在叶球中的最高平均生存期来自白菜（70天），番茄（67天），小麦和南瓜（63天），黑燕麦和萝卜（56天）和甜椒（49天）。与没有植物的土壤相比，评估的大多数农作物的根际Xcc存活率较低。圆白菜的根际平均存活期最高（53天）。生菜，南瓜，小麦和芥末的生存期为21至28天。在六种土壤中种植的白菜根际，生存期为8至17天。

结论

建议将向日葵，胡萝卜，西葫芦，菠菜、,麻，高粱，玉米和细香葱用于带有芸苔属的轮作系统，因为Xcc在这些农作物的根际和根际中存活率较低。