Comparative secretome analysis of Rhizoctonia solani isolates with different host ranges reveals unique secretomes and cell death inducing effectors.

Comparative secretome analysis of Rhizoctonia solani isolates with different host ranges reveals unique secretomes and cell death inducing effectors.
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DOI:
10.1038/s41598-017-10405-y
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发表时间:
2017-09-05
期刊:
影响因子:
4.6
通讯作者:
Singh KB
Singh KB
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Anderson JP;Sperschneider J;Win J;Kidd B;Yoshida K;Hane J;Saunders DGO;Singh KB

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立枯丝核菌(Rhizoctoniasolani)是一种真菌病原体,对世界上许多最大的粮食作物(包括小麦、水稻、玉米和大豆)造成重大损害。尽管影响全球粮食安全,很少有人知道的致病机制所采用的R。索拉尼为了能够预测具有广泛功效或宿主特异性的效应物,从感染单子叶植物和双子叶植物宿主的单子叶植物特异性分离物、双子叶植物特异性分离物和广泛宿主范围分离物构建组合的分泌组。分泌组分析表明,R.尽管在许多情况下感染相同的宿主植物,但solani对已充分研究的病原体采用了很大程度上不同的毒力机制。此外,广泛的宿主范围AG8分离物的分泌组可以通过维持寄生生命阶段的功能而形成,同时最大限度地减少宿主植物识别的机会。与宿主植物的可能的共同进化和植物内上调的分析,特别是辅助鉴定的效应物,包括木聚糖酶和抑制剂I9域含有蛋白质能够诱导细胞死亡植物内。抑制剂I9结构域是更丰富的分泌物的范围广泛的坏死真菌相对于生物营养型。这些发现提供了新的目标,进一步解剖的毒力机制和潜在的途径,以控制这种特征不足,但重要的病原体。
Rhizoctonia solani is a fungal pathogen causing substantial damage to many of the worlds’ largest food crops including wheat, rice, maize and soybean. Despite impacting global food security, little is known about the pathogenicity mechanisms employed by R. solani. To enable prediction of effectors possessing either broad efficacy or host specificity, a combined secretome was constructed from a monocot specific isolate, a dicot specific isolate and broad host range isolate infecting both monocot and dicot hosts. Secretome analysis suggested R. solani employs largely different virulence mechanisms to well-studied pathogens, despite in many instances infecting the same host plants. Furthermore, the secretome of the broad host range AG8 isolate may be shaped by maintaining functions for saprophytic life stages while minimising opportunities for host plant recognition. Analysis of possible co-evolution with host plants and in-planta up-regulation in particular, aided identification of effectors including xylanase and inhibitor I9 domain containing proteins able to induce cell death in-planta. The inhibitor I9 domain was more abundant in the secretomes of a wide range of necrotising fungi relative to biotrophs. These findings provide novel targets for further dissection of the virulence mechanisms and potential avenues to control this under-characterised but important pathogen.
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影响因子: --
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