Isolation, Characterization, and Expression Analysis of an SKP1-like Gene from ‘Shatian' Pummelo (Citrus grandis Osbeck)
Publication Overview
Abstract Plant s-phase kinase-associated protein 1 (SKP1) genes have diverse functions in plant developmental and physiological activities. Herein, we described a novel SKP1 gene, designated as CgSKP1, from ‘Shatian' pummelo (Citrus grandis Osbeck). The cDNA sequence of CgSKP1 was 603 bp and contained an open reading frame of 477 bp. Genomic sequence of the CgSKP1 gene contained two exons and one intron. The predicted amino acid sequence of this gene is consisted of 158 amino acids with theoretical proteins size of 17.9 kDa. CgSKP1 had high identity with SKP1 genes from other plant species within two conserved region. Full-length cDNAs were also amplified and cloned from six citrus varieties, with 95% nucleotide identity and about 98% amino acid similarity among them. Gel blot analysis suggested that CgSKP1 existed as a single locus in the ‘Shatian' pummelo genome. The expression of CgSKP1 was gradually increased during flower developmental stages in ‘Shatian' pummelo. Moreover, expression analysis by RT-PCR, qRT-PCR and in situ hybridization of CgSKP1 showed that it was highly expressed in the leaf, petal, anther and ovary, but lowly in the style. These findings indicated that CgSKP1 was closely related to ‘Shatian' pummelo flower development.
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