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INTRODUCTION: The CPSF family (cleavage and polyadenylation specificity factor) is a crucial protein family that is responsible for polyadenylation signal recognition in mRNA precursors, cleavage and the addition of poly(A) tails to mRNAs in plants. This family plays crucial roles in the regulation of flowering time, the environmental response, and seed development. Currently, the function of the CPSF family genes in Brassica napus is unclear.
RATIONALE: To explore the function and expression patterns of the CPSF gene family, this study cloned BnaA02.CPSF6 from B. napus variety Zhongshuang No.11 and conducted bioinformatics analysis, subcellular localization, expression pattern, and functional characterization of the gene.
RESULTS: These results indicate that the coding region of the BnaA02.CPSF6 gene is 1 938 bp in length and encodes 646 amino acids without intron structures. Its promoter region contains multiple cis-acting elements involved in light responses and MYB binding sites. Additionally, there are six genes homologous to BnaA02.CPSF6 in B. napus. The BnaA02.CPSF6 gene expressed in the roots, stems, leaves, flowers and different developmental seeds of B. napus, especially significantly higher in 15-35 d developmental seeds, and its encoded protein was localized in the nucleus. The BnaA02.CPSF6 gene expression is upregulated under salt and drought stress. Under treatment with hormones such as ABA, IAA, GA3, SA, and MeJA, the expression of BnaA02.CPSF6 gene is initially inhibited and then gradually recovers to normal levels. Under normal conditions, the overexpression of the BnaA02.CPSF6 gene in Arabidopsis thaliana results in an early bolting phenotype, along with a reduced number of rosette leaves.
CONCLUSION: In summary, the above results indicate that the BnaA02.CPSF6 is involved in abiotic stress responses, is regulated by phytohormones, and may also play a promoting role in flowering regulation.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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