Plant glycosyltransferase 2 (GT2) family genes are involved in plant abiotic stress tolerance. However, the roles of GT2 genes in the abiotic resistance in freshwater plants are largely unknown. We identified seven GT2 genes in duckweed, remarkably more than those in the genomes of Arabidopsis thaliana , Oryza sativa , Amborella trichopoda , Nymphaea tetragona , Persea americana , Zostera marina , and Ginkgo biloba , suggesting a significant expansion of this family in the duckweed genome. Phylogeny resolved the GT2 family into two major clades. Six duckweed genes formed an independent subclade in Clade I, and the other was clustered in Clade II. Gene structure and protein domain analysis showed that the lengths of the seven duckweed GT2 genes were varied, and the majority of GT2 genes harbored two conserved domains, PF04722.12 and PF00535.25. The expression of all Clade I duckweed GT2 genes was elevated at 0 h after salt treatment, suggesting a common role of these genes in rapid response to salt stress. The gene Sp01g00794 was highly expressed at 12 and 24 h after salt treatment, indicating its association with salt stress resilience. Overall, these results are essential for studies on the molecular mechanisms in stress response and resistance in aquatic plants.

中文翻译：

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浮萍 (Spirodela polyrhiza) 糖基转移酶 2 家族基因的计算机分析及其在耐盐胁迫中的作用

植物糖基转移酶 2 (GT2) 家族基因参与植物非生物胁迫耐受性。然而，GT2 基因在淡水植物非生物抗性中的作用尚不清楚。我们在浮萍中发现了 7 个 GT2 基因，明显多于拟南芥、水稻、Amborella trichopoda、Nymphaea tetragona、Persea americana、Zostera marina 和 Ginkgo biloba 基因组中的基因，表明该家族在浮萍基因组中显着扩展。系统发育将 GT2 家族分为两个主要分支。6个浮萍基因在Clade I中形成一个独立的亚支，另一个聚集在Clade II中。基因结构和蛋白结构域分析表明，7个浮萍GT2基因的长度存在差异，大多数GT2基因具有两个保守结构域：PF04722.12和PF00535.25。所有 Clade I 浮萍 GT2 基因的表达在盐处理后 0 h 时升高，表明这些基因在快速响应盐胁迫中具有共同作用。Sp01g00794基因在盐处理后12和24小时高表达，表明其与盐胁迫恢复能力相关。总的来说，这些结果对于研究水生植物胁迫响应和抗性的分子机制至关重要。