期刊
PLANT BIOSYSTEMS
卷 144, 期 3, 页码 582-591出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/11263504.2010.489315
关键词
Arbuscular mycorrhizal fungi; fluorescent pseudomonads; hypovirulent Rhizoctonia solani; root architecture; root topology
资金
- MIUR
Although Rhizoctonia solani is a cosmopolitan soilborne pathogen, the genus includes isolates with different pathogenicity ranging from high virulence to avirulence. The biocontrol strain Pseudomonas fluorescens P190r and the arbuscular mycorrhizal (AM) fungus Glomus mosseae BEG12 were inoculated alone or in combination in tomato plants infested by the mildly virulent pathogen R. solani #235. Plant growth as well as root morphometric and topological parameters were evaluated. The infection of R. solani was significantly reduced by all the combinations of the beneficial microorganisms. Root systems of R. solani-infected plants were weakly developed but highly branched with a herring-bone pattern, while those inoculated with the AM fungus, alone or in combination with the bacterial strain, were longer and more developed, and displayed a dichotomous pattern. The interactions among these three microorganisms affected plant growth and root architecture of tomato plants.
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