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首页> 外文期刊>The New Phytologist >Plant Defensin type 1 (PDF1): protein promiscuity and expression variation within the Arabidopsis genus shed light on zinc tolerance acquisition in Arabidopsis halleri
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Plant Defensin type 1 (PDF1): protein promiscuity and expression variation within the Arabidopsis genus shed light on zinc tolerance acquisition in Arabidopsis halleri

机译：植物防御素1型（PDF1）：拟南芥属中的蛋白质混杂和表达变异为拟南芥中锌耐性的获得提供了启示

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摘要

Plant defensins are recognized for their antifungal properties. However, a few type 1 defensins (PDF1s) were identified for their cellular zinc (Zn) tolerance properties after a study of the metal extremophile Arabidopsis halleri. In order to investigate whether different paralogues would display specialized functions, the A. halleri PDF1 family was characterized at the functional and genomic levels. Eleven PDF1s were isolated from A. halleri. Their ability to provide Zn tolerance in yeast cells, their activity against Fusarium oxysporum f. sp. melonii, and their level of expression in planta were compared with those of the seven A. thaliana PDF1s. The genomic organization of the PDF1 family was comparatively analysed within the Arabidopsis genus. AhPDF1s and AtPDF1s were able to confer Zn tolerance and AhPDF1s also displayed antifungal activity. PDF1 transcripts were constitutively more abundant in A. halleri than in A. thaliana. Within the Arabidopsis genus, the PDF1 family is evolutionarily dynamic, in terms of gain and loss of gene copy. Arabidopsis halleri PDF1s display no superior abilities to provide Zn tolerance. A constitutive increase in AhPDF1 transcript accumulation is proposed to be an evolutionary innovation co-opting the promiscuousPDF1 protein for its contribution to Zn tolerance in A. halleri.
机译：植物防御素因其抗真菌特性而闻名。然而，在对嗜金属极端微生物拟南芥进行研究后，鉴定出一些1型防御素（PDF1s）具有细胞锌（Zn）耐受特性。为了研究不同的旁系同源物是否会显示专门的功能，在功能和基因组水平上对哈雷菌PDF1家族进行了表征。从哈利木霉中分离出11个PDF1。它们在酵母细胞中提供锌耐受性的能力，对尖镰孢的活性f。 sp。将甜瓜及其在植物中的表达水平与七个拟南芥PDF1进行比较。在拟南芥属中比较分析了PDF1家族的基因组组织。 AhPDF1s和AtPDF1s能够赋予锌耐性，AhPDF1s也显示出抗真菌活性。相对于拟南芥，H。Halleri中的PDF1转录本质丰富。在拟南芥属中，就基因拷贝的获得和丧失而言，PDF1家族是进化动态的。拟南芥PDF1s没有显示出提供锌耐受性的卓越能力。提出AhPDF1转录本积累的组成性增加是一项进化创新，选择了混杂PDF1蛋白来促进A. halleri对锌的耐受性。

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