Systemically Induced Resistance and Microbial Competitive Exclusion: Implications on Biological Control
Systemically Induced Resistance and Microbial Competitive Exclusion: Implications on Biological Control
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DOI：
10.1094/phyto-04-11-0120
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发表时间：
2012-03-01
期刊：
影响因子：
3.2
通讯作者：
Sikora, R. A.
中科院分区：
文献类型：
--
作者：
Martinuz, A.;Schouten, A.;Sikora, R. A.
南方根结线虫（Meloidogyne incognita）是危害最大的农业害虫之一，尤其是对番茄。互惠内生菌尖孢镰刀菌菌株Fo162（Fo162）和etli根瘤菌菌株G12（G12）已经显示系统诱导对M.无名氏通过使用三裂根番茄植株，空间上分开但同时接种两种内生菌并没有导致M.不明感染更重要的是，在空间上分开接种Fo162和G12导致Fo162根定殖减少35%和39%时，G12接种在一个单独的根部分相同的植物在两个独立的实验。在另外的分根实验中，在两个独立的实验中，Fo162和G12的空间分离导致Fo162根定殖比水对照减少约50%。结果表明，G12对Fo162和M.可能与诱导植物特异的防御机制有关。因此，尽管Fo162和G12具有系统性抑制M的能力。当两种生物体同时存在于同一根系上时，它们可以被认为是不相容的生物防治剂。
The root-knot nematode, Meloidogyne incognita, is among the most damaging agricultural pests, particularly to tomato. The mutualistic endophytes Fusarium oxysporum strain Fo162 (Fo162) and Rhizobium etli strain G12 (G12) have been shown to systemically induce resistance toward M. incognita. By using triple-split-root tomato plants, spatially separated but simultaneous inoculation of both endophytes did not lead to additive reductions in M. incognita infection. More importantly, spatially separated inoculation of Fo162 and G12 led to a reduction in Fo162 root colonization of 35 and 39% when G12 was inoculated on a separate root section of the same plant in two independent experiments. In an additional split-root experiment, spatial separation of Fo162 and G12 resulted in a reduction of Fo162 root colonization of approximately 50% over the water controls in two independent experiments. The results suggested that the suppressive activity of G12 on Fo162 and M. incognita is possibly related to the induction of specific plant defense mechanisms. Thus, although Fo162 and G12 have the ability to systemically repress M. incognita infection in tomato, they can be considered incompatible biocontrol agents when both organisms are present simultaneously on the same root system.