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- Title
短小芽孢杆菌 AR03 对烟草赤星病菌和白粉病菌的防治.
- Authors
王 静; 田 华; 孔凡玉; 王贻鸿; 张成省; 冯 超
- Abstract
This study aimed to evaluate the efficiency of Bacillus pumilus AR03 against Altenaria alternata and Erysiphe cichoracearum. The antagonistic activities were studied in the way of co-culture on plate, inhibition of pathogen conidia germination on concave slides and LB agar medium. In the investigation, the water suspension of living cells of strain AR03, at 3×108 cfu • mL-1 had a remarkable inhibition effect on hyphae growth and conidia germination of A. alternata and caused hyphae deformation, shorter and swollen nodes, winding hyphae accumulation, abnormal tubes with tips expanded or deformed. Conidia did not germinate and the tissues of compartment became swollen or formed a round spherical bubble. In addition, the inhibition rate of conidia germination of E. cichoracearum was 91.3% and 69. 3%, respectively when treated with strain AR03 at 1 × 107 cfu • mL-1 and 1.5×106 cfu • mL-1. Conidia treated by living cells of AR03 became swollen, deformed, the protoplasm of conidia shrinked, disintegrated gradually and separated from the conidia wall. And some conidia were hollow because the protoplasm leaked out from inside. Greenhouse results revealed that the effects of living cells of AR03 with different concentrations were significantly different. Bacterial suspension of AR03 at 3×108 cfu · · mL-1 was strongly antagonistic to E. cihoracearum with the control efficiencies 7 days and 15 days after treatment of two spays being 83.8% and 90.3%, respectively, while the control efficiencies of AR03 at 3×106 cfu • mL-1 were 70.0% and 73.3% , respectively. Strain AR03 had a long persistence against powdery mildew more than 30 days.
- Publication
Yingyong Shengtai Xuebao, 2015, Vol 26, Issue 10, p3167
- ISSN
1001-9332
- Publication type
Article