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首页> 外文期刊>Journal of Experimental Botany >Wheat BAX inhibitor-1 contributes to wheat resistance to Puccinia striiformis.
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Wheat BAX inhibitor-1 contributes to wheat resistance to Puccinia striiformis.

机译：小麦BAX抑制剂1有助于小麦抗条锈菌。

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摘要

BAX inihibitor-1 (BI-1) is proposed to be a cell death suppressor conserved in both animals and plants. The ability of BI-1 genes to inhibit programmed cell death (PCD) has been well studied in animals, but the physiological importance of BI-1 in plant-microbe interactions remains unclear. This study characterized BI-1 from wheat infected by Puccinia striiformis f. sp. tritici (Pst). The deduced TaBI-1 protein contained a Bax inhibitor domain and seven transmembrane regions conserved among members of the BI-1 family. Transcription of TaBI-1 was detected in all wheat tissues tested (culms, roots, leaves, anthers, and spikelets). Furthermore, TaBI-1 exhibited positive transcriptional responses to Pst infection and abiotic stresses. Overexpression of TaBI-1 in tobacco blocked Bax-induced cell death. Silencing TaBI-1 in plants of a resistant wheat genotype converted a resistant reaction to a relatively susceptible reaction when inoculated with an avirulent pathotype of the pathogen, and increased the area per infection site, but the percentage of necrotic cells did not change significantly, indicating that TaBI-1, a negative cell death regulator, contributes to wheat resistance to stripe rust. These results provide a better understanding of the molecular mechanism of wheat resistance to stripe rust.
机译：BAX inihibitor-1（BI-1）被认为是在动物和植物中都保守的细胞死亡抑制剂。 BI-1基因抑制程序性细胞死亡（PCD）的能力已在动物中进行了充分研究，但BI-1在植物与微生物相互作用中的生理重要性仍不清楚。这项研究表征了小麦条锈菌感染小麦的BI-1。 sp。 Tritici（Pst）。推导的TaBI-1蛋白包含一个Bax抑制剂域和BI-1家族成员中保守的七个跨膜区域。在所有测试的小麦组织（茎，根，叶，花药和小穗）中均检测到TaBI-1的转录。此外，TaBI-1表现出对Pst感染和非生物胁迫的积极转录反应。 TaBI-1在烟草中的过表达阻止了Bax诱导的细胞死亡。接种抗病基因型的小麦后，在具有抗性的小麦基因型的植物中沉默TaBI-1会将抗性反应转化为相对敏感的反应，并增加了每个感染部位的面积，但坏死细胞的百分比没有明显变化，表明TaBI-1（一种负性细胞死亡调节剂）有助于小麦抗条纹锈病。这些结果更好地了解了小麦抗条锈病的分子机理。

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