Plant calmodulin-binding transcription activator (CAMTA) proteins play important roles in hormone signal transduction, developmental regulation, and environmental stress tolerance. However, in wheat, the CAMTA gene family has not been systematically characterized. In this work, 15 wheat CAMTA genes were identified using a genome-wide search method. Their chromosome location, physicochemical properties, subcellular localization, gene structure, protein domain, and promoter cis-elements were systematically analyzed. Phylogenetic analysis classified the TaCAMTA genes into three groups (groups A, B, and C), numbered 7, 6, and 2, respectively. The results showed that most TaCAMTA genes contained stress-related cis-elements. Finally, to obtain tissue-specific and stress-responsive candidates, the expression profiles of the TaCAMTAs in various tissues and under biotic and abiotic stresses were investigated. Tissue-specific expression analysis showed that all of the 15 TaCAMTA genes were expressed in multiple tissues with different expression levels, as well as under abiotic stress, the expressions of each TaCAMTA gene could respond to at least one abiotic stress. It also found that 584 genes in wheat genome were predicted to be potential target genes by CAMTA, demonstrating that CAMTA can be widely involved in plant development and growth, as well as coping with stresses. This work systematically identified the CAMTA gene family in wheat at the whole-genome-wide level, providing important candidates for further functional analysis in developmental regulation and the stress response in wheat.

中文翻译：

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小麦（Triticum aestivum L.）钙调蛋白结合转录激活因子（CAMTA）基因家族的全基因组鉴定和表达分析。

植物钙调蛋白结合转录激活因子（CAMTA）蛋白在激素信号转导，发育调节和环境胁迫耐受性中起重要作用。但是，在小麦中，尚未对CAMTA基因家族进行系统表征。在这项工作中，使用全基因组搜索方法鉴定了15个小麦CAMTA基因。系统分析了它们的染色体位置，理化特性，亚细胞定位，基因结构，蛋白质结构域和启动子顺式元件。系统发育分析将TaCAMTA基因分为三组（A，B和C组），分别编号为7、6和2。结果表明，大多数TaCAMTA基因均含有应激相关的顺式元素。最后，要获得组织特异性和压力反应性候选者，研究了TaCAMTA在各种组织以及生物和非生物胁迫下的表达情况。组织特异性表达分析表明，这15个TaCAMTA基因全部在具有不同表达水平的多个组织中表达，并且在非生物胁迫下，每个TaCAMTA基因的表达均可响应至少一个非生物胁迫。研究还发现，CAMTA预测小麦基因组中的584个基因是潜在的靶基因，这表明CAMTA可以广泛参与植物的发育和生长以及应对胁迫。这项工作系统地在全基因组水平上鉴定了小麦中的CAMTA基因家族，为进一步研究小麦的发育调控和胁迫响应提供了重要的候选者。