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首页> 外文期刊>Functional Plant Biology >Defence mechanisms associated with mycorrhiza-induced resistance in wheat against powdery mildew
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Defence mechanisms associated with mycorrhiza-induced resistance in wheat against powdery mildew

机译：与菌根诱导的小麦抗粉状霉菌的防御机制

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摘要

To develop a more sustainable agriculture using alternative control strategies, mechanisms involved in the biocontrol ability of the arbuscular mycorrhizal fungus Funneliformis mosseae to protect wheat against the foliar biotrophic pathogen Blumeria graminis f. sp. tritici were investigated under controlled conditions. B. graminis infection on wheat leaves was reduced by 78% in mycorrhizal plants compared with non-mycorrhizal ones (control). Wheat roots inoculated with F. mosseae revealed a systemic resistance in leaves to B. graminis, after a 6-week co-culture. Accordingly, this resistance was associated with a significant reduction of B. graminis haustorium formation in epidermal leaf cells of mycorrhizal wheat and an accumulation of phenolic compounds and H2O2 at B. graminis penetration sites. Moreover, gene expression analysis demonstrated upregulation of genes encoding for several defence markers, such as peroxidase, phenylalanine ammonia lyase, chitinase 1 and nonexpressor of pathogenesis-related proteins 1 in mycorrhizal wheat only in the absence of the pathogen. This study showed that protection of wheat obtained against B. graminis in response to mycorrhizal inoculation by F. mosseae could be interpreted as a mycorrhiza-induced resistance (MIR). Our findings also suggest that MIR-associated mechanisms impaired the B. graminis development process and corresponded to a systemic elicitation of plant defences rather than a primed state in wheat leaves.
机译：利用替代控制策略制定更可持续的农业，参与丛枝菌根真菌菌兵的生物控制能力的机制来保护小麦免受叶面生物养殖病原体Blumeria Graminis F. SP。在受控条件下调查Tritici。 B.与非菌根植物相比，小麦叶片对小麦叶子的麦片感染减少了78％（对照）。用F.Mossee接种的小麦根揭示了在6周的共同培养后的叶片到B.Graminis的全身性。因此，这种阻力与菌根小麦表皮叶细胞的B.麦片叶片细胞的显着减少有关。B.Graminis渗透位点的酚类化合物和H 2 O 2的积累。此外，基因表达分析表明，在没有病原体的情况下，在菌根小麦中，对几种防御标志物的较上调，例如过氧化物酶，苯丙氨酸氨溶酶，几丁酶1和非转化性相关蛋白1的非转化体。该研究表明，对B.麦片获得的小麦的保护响应于F.Mossea的菌根接种，可以解释为肌菌诱导的抗性（MIR）。我们的调查结果还表明，MIR相关机制损害了B.禾本科开发过程，并与植物防御的系统引发而非麦小叶中的灌注态。

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