丁香假单胞菌
几丁质酶
微生物学
生物
酶
细胞壁
假单胞菌
真菌
细菌
突变体
生物测定
生物化学
病菌
植物
遗传学
基因
作者
Vincenzo Fogliano,A. Ballio,Monica Gallo,Sheridan L. Woo,Felice Scala,Matteo Lorito
标识
DOI:10.1094/mpmi.2002.15.4.323
摘要
Pseudomonas syringae pv. syringae strain B359 secreted two main lipodepsipeptides (LDPs), syringomycin E (SRE) and syringopeptin 25A (SP 25A ), together with at least four types of cell wall—degrading enzymes (CWDEs). In antifungal bioassays, the purified toxins SRE and SP 25A interacted synergistically with chitinolytic and glucanolytic enzymes purified from the same bacterial strain or from the biocontrol fungus Trichoderma atroviride strain P1. The synergism between LDPs and CWDEs occurred against all seven different fungal species tested and P. syringae itself, with a level dependent on the enzyme used to permeabilize the microbial cell wall. The antifungal activity of SP 25A was much more increased by the CWDE action than was that of the smaller SRE, suggesting a stronger antifungal role for SP 25A . In vivo biocontrol assays were performed by using P. syringae alone or in combination with T. atroviride, including a Trichoderma endochitinase knock-out mutant in place of the wild type and a chitinase-specific enzyme inhibitor. These experiments clearly indicate that the synergistic interaction LDPs—CWDEs is involved in the antagonistic mechanism of P. syringae, and they support the concept that a more effective disease control is given by the combined action of the two agents.
科研通智能强力驱动
Strongly Powered by AbleSci AI