نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری، گروه بیوتکنولوژی کشاورزی، دانشکده علوم کشاورزی، دانشگاه گیلان، رشت، ایران
2 دانشیار، گروه بیوتکنولوژی کشاورزی، دانشکده علوم کشاورزی، دانشگاه گیلان،
3 دانشگاه گیلان- ژنتیک مولکولی و بیومتری
4 دانشآموخته دکتری، گروه بیوتکنولوژی کشاورزی، دانشکده علوم کشاورزی، دانشگاه گیلان، رشت، ایران پژوهشگر، واحدفناورزیست رادان
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Introduction
Plants are often exposed to various environmental stresses, such as drought, which significantly reduces growth and crop productivity. Therefore, this study aimed to identify the key genes and pathways involved in drought stress and to introduce them for the genetic improvement of crop plants under environmental stress conditions.
Materials and Methods
In this study, microarray data of two rice cultivars, drought-tolerant (Dagad deshi) and drought-sensitive (IR20), were analyzed under drought stress. Differentially expressed genes in these two genotypes were identified using the GEO2R tool. Biological pathways, cellular components, and molecular functions related to drought tolerance in the tolerant cultivar were determined, and key genes and their regulating miRNAs were analyzed.
Research findings
Microarray data analysis revealed that under drought stress conditions, 33% of genes were upregulated and 26% downregulated in the tolerant cultivar (Dagad deshi), while in the sensitive cultivar (IR20), 7% of genes were upregulated and 6% were downregulated with significant expression changes. Additionally, 766 genes exhibited upregulation and 340 genes showed downregulation with significant expression changes in both cultivars. The most significant biological processes, cellular components, and molecular functions among the upregulated genes in the tolerant cultivar included response to salicylic acid, cytoplasm, and carboxylase activity, while downregulated genes included monomethylation of peptide lysine, large mitochondrial ribosomal subunit, and long-chain Acyl-CoA reductase activity forming alcohol. KEGG pathway enrichment analysis revealed that the upregulated and downregulated genes in the tolerant cultivar were enriched in 18 and 10 pathways, respectively. Fifteen key, MCM5، Os05g0358200، MCM4، MCM7، NAC037، OS11G0128400، CDC6، RPA2A، OS12G0124700، MCM3، POLA، Os07g0406800، MCM6، Os05g0160800 و PCNA genes were identified as contributors to drought stress resistance pathways, several of which belonged to the MCM gene family. Finally, 247 miRNAs such as osa-miR172c, osa-miR1849, osa-miR2925, osa-miR397a and osa-miR397a were investigated for genes involved in the drought stress resistance pathway.
Conclusion
The key genes and miRNAs identified in this study, which play a role in drought stress tolerance, seem to have the potential to be used for breeding and developing drought-tolerant rice plants.
کلیدواژهها [English]