Potato plants are often exposed to biotic and abiotic stresses that negatively impact their growth, development, and yield. Plants respond to different stresses by inducing large numbers of stress-responsive genes, which can be either functional or regulatory genes. Among regulatory genes, Dehydration Responsive Element Binding (DREB) genes are considered as one of the main groups of transcriptional regulators. The overexpression of these factors in several transgenic plants leads to enhancement of abiotic stress tolerance. However, a number of reports showed that the overexpression of DREB factors under control of constitutive promoter, affects their morphology and production. Therefore, it becomes interesting to evaluate the effect of the overexpression of this StDREB1 transcription factor on plant growth, morphology, yield and tuber composition under both greenhouse and field culture conditions. To our knowledge, there is no available data on the effect of DREBA-4 overexpression on potato plants morphology and yield. Indeed, most studies focused on DREB genes from A-1 and A-2 groups for other plant species. Our results showed that StDREB1, a A-4 group of DREB gene from potato (Solanum tuberosum L.), overexpressing plants did not show any growth retardation. On the contrary, they seem to be more vigorous, and produced higher tuber weight in greenhouse and field culture than the wild type (WT) plants. Moreover, the overexpression of StDREB1 transcription factor seemed to have an effect on tuber quality in terms of dry matter, starch contents and reducing sugars in comparison to the WT tubers. These data suggest that the StDREB1 gene from A-4 group of DREB subfamily can be a good candidate in potato breeding for stress tolerance.

马铃薯植株经常遭受生物和非生物胁迫，会对植物的生长，发育和产量产生负面影响。植物通过诱导大量的胁迫反应基因来响应不同的胁迫，这些基因可以是功能基因也可以是调控基因。在调节基因中，脱水响应元件结合（DREB）基因被认为是转录调节子的主要组之一。这些因子在几种转基因植物中的过表达导致非生物胁迫耐受性的增强。但是，许多报告表明DREB因子的过度表达受组成型启动子控制，影响其形态和产量。因此，评估这种StDREB1转录因子过表达对温室和田间栽培条件下植物生长，形态，产量和块茎组成的影响变得很有趣。据我们所知，没有关于DREBA-4过表达对马铃薯植株形态和产量的影响的可用数据。实际上，大多数研究都集中在其他植物物种的A-1和A-2组的DREB基因上。我们的结果表明，StDREB1是马铃薯（马铃薯）DREB基因的A-4组。L.），过表达的植物没有显示任何生长迟缓。相反，它们似乎比野生型（WT）植物更有活力，并且在温室和田间培养中产生更高的块茎重量。而且，与野生型块茎相比，过量表达StDREB1转录因子似乎对块茎质量有影响，包括干物质，淀粉含量和还原糖。这些数据表明，DREB亚家族的A-4组的StDREB1基因可以作为马铃薯耐逆性育种的良好候选者。