Protein domains with conserved amino acid sequences and uncharacterized functions are called domains of unknown function (DUF). The gene family plays a crucial role in plant growth, particularly in light regulation, floral organ development, and fruit development. However, there exists a lack of systematic understanding of the evolutionary relationships and functional differentiation of within the . In this study, 61 genes were identified in the . The expression of is induced by multiple hormonal stressors including abscisic acid (ABA), cytokinin (CK), ethylene (ETH), and indole-3-acetic acid (IAA). Specifically, expression significantly increased after ETH treatment. Transgenic experiments showed that overexpressing lines were sensitive to ETH, and seedling length was obstructed. Evolutionary analysis revealed differentiation of the gene in ssp. and varieties, likely driven by natural selection during the domestication of cultivated rice. These results indicate that plays a vital role in the regulation of rice seedling length.

中文翻译：

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水稻生长相关DUF640基因的综合鉴定与分析

具有保守氨基酸序列和未表征功能的蛋白质结构域称为未知功能结构域（DUF）。该基因家族在植物生长中发挥着至关重要的作用，特别是在光调节、花器官发育和果实发育中。然而，对内部的进化关系和功能分化缺乏系统的理解。在这项研究中，在 .的表达由多种激素应激源诱导，包括脱落酸（ABA）、细胞分裂素（CK）、乙烯（ETH）和吲哚-3-乙酸（IAA）。具体而言，ETH 处理后表达显着增加。转基因实验表明，过表达株系对ETH敏感，且幼苗长度受阻。进化分析揭示了该基因在 ssp 中的分化。和品种，可能是由栽培稻驯化过程中的自然选择驱动的。这些结果表明在水稻苗长的调节中起着至关重要的作用。