Cloning and analysis of a MADS-like gene in Carya cathayensis
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摘要: MADS-box基因在植物花发育的整个阶段起到了极为关键的作用。根据山核桃 Carya cathayensis 雌花芽454测序得到的基因片段,采用cDNA末端快速扩增(RACE)技术,获得了1条CcMADS-like基因。序列分析结果表明:CcMADS-like开放阅读框(ORF)长度为609 bp,编码202个氨基酸,具有典型的MADS-box结构域,包括高度保守的MADS盒和K区以及I区、C区。CcMADS-like与拟南芥Arabidopsis thaliana,金鱼草Antirrhinum majus,美洲黑杨Populus deltoides,欧洲大叶杨Populus trichocarpa等的同源基因所编码的蛋白质同源性分别达到48%,65%,69%,71%。山核桃不同组织实时荧光定量聚合酶链式反应(qRT-PCR)结果表明:CcMADS-like基因在花芽中表达量远远高于其他组织,暗示该基因极有可能参与山核桃成花发育。酵母单杂交实验表明,CcMADS-like蛋白具有转录激活活性。图5表1参25Abstract: MADS-box family genes play key roles in all phases of floral development. Based on a partial fragment acquired from 454 sequencing of Carya cathayensis (hickory) floral buds, a full-length of a MADS-like gene was obtained by rapid amplification of cDNA ends (RACE). Afterwards, a quantitative real-time (qRT) polymerase chain reaction (PCR) analysis, an amino acid sequence alignment, and a yeast one-hybrid assay were performed. Results of the sequence analysis revealed the open reading frame (ORF) of the CcMADS-like gene was 609 bp in length and encoded a protein of 202 aa. The protein presented typical characteristic of MADS-box family genes and contained MADS domain, I, K, and C, with the MADS domain was considerably conserved. The amino acid sequence alignment showed that the putative protein CcMADS-like gene had an identity to homologies of Arabidopsis thaliana (48%), Antirrhinum majus (65%), Populus deltoides (69%), and Populus trichocarpa (71%). The qRT-PCR analysis revealed that the expression level of CcMADS-like gene in flower buds was much higher than in other tissues. The yeast one-hybrid showed that the CcMADS-like gene had an activation activity as a transcription factor. Overall, the qRT-PCR analysis suggested that CcMADS-like gene possibly participated in floral development of hickory. [Ch, 5 fig. 1 tab. 25 ref.]
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Key words:
- cash forestry /
- floral development /
- Carya cathayensis /
- MADS-box /
- gene clone /
- qRT-PCR /
- yeast one-hybrid
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2015.01.005
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