Abstract 【Objective】It is known that the new plant hormone strigolactone is a key factor regulating plant branching development, but the role of strigolactone in the growth and development of strawberry plants is unclear. In this study, the expression characteristics and function of the key gene DWARF27 (D27) for strigolactone biosynthesis in woodland strawberry (Fragaria vesca) was revealed, and the role of FveD27 in strawberry branching growth and development was explored, which would lay a theoretical foundation for studying strawberry plant architecture. 【Method】The coding sequence region of strigolactone synthesis key gene FveD27 was cloned by RT-PCR from woodland strawberry. The phylogenetic relationship between FveD27 and D27 in apple, Arabidopsis and other species was analyzed by using MEGA 6.0. A fusion vector of FveD27 and GFP was constructed to inject tobacco leaves for analyzing the subcellular location of FveD27. The expression level of FveD27 in different organs of woodland strawberry was analyzed by qRT-PCR technology. The FveD27 promoter and GUS fusion expression vector was constructed and transformed into woodland strawberry by Agrobacterium-mediated method, and the expression characteristic of FveD27 was further analyzed by GUS staining. The overexpression vector of FveD27 was constructed and the FveD27 overexpression strawberry lines were obtained by Agrobacterium-mediated transformation with leaf disks of woodland strawberry as explants. 【Result】The coding sequence region of FveD27 with the length of 789 bp was cloned from woodland strawberry. The subcellular localization in tobacco showed that FveD27 was located in the chloroplast. The expression levels of FveD27 in woodland strawberry organs from high to low were followed by young leaves, shoot tips, petiole, mature leaves and roots. The FveD27 promoter sequence with a length of 1670 bp was cloned, and transgenic plants with pFveD27::GUS gene showed that the young leaves and buds had strong GUS activity, the mature leaves and petioles had weak GUS activity, while the roots had little GUS activity. The result of FveD27 expression revealed by GUS analysis was consistent with the result by qRT-PCR. The FveD27 overexpression vector was constructed and the transgenic woodland strawberry lines overexpressing FveD27 were obtained with Agrobacterium-mediated transformation. Overexpressing FveD27 in woodland strawberry inhibited significantly the formation of branch crowns and increased the number of inflorescences. 【Conclusion】FveD27 had the functions of regulating the development of branch crowns and the number of inflorescences in woodland strawberry, and this study provided new ideas for regulating the number of branch crowns and yield of strawberry. Keywords:Fragaria vesca;strigolactone;D27;subcellular localization;branching
PDF (3396KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 孙洪影, 王岩, 李伟佳, 朱天姝, 姜颖, 许妍, 吴清悦, 张志宏. 森林草莓FveD27的表达特性和功能[J]. 中国农业科学, 2021, 54(10): 2179-2191 doi:10.3864/j.issn.0578-1752.2021.10.013 SUN HongYing, WANG Yan, LI WeiJia, ZHU TianShu, JIANG Ying, XU Yan, WU QingYue, ZHANG ZhiHong. Expression Characteristics and Function of FveD27 in Woodland Strawberry[J]. Scientia Acricultura Sinica, 2021, 54(10): 2179-2191 doi:10.3864/j.issn.0578-1752.2021.10.013
FveD27 NCBI-Nseq:FveD27基因NCBI核酸序列 Nucleic acid sequence of FveD27 gene in NCBI;FveD27 RNA-Nseq:FveD27基因转录组测序核酸序列 Nucleic acid sequence of FveD27 gene in RNA-seq;FveD27 PCR-Nseq:FveD27基因PCR扩增核酸序列 Nucleic acid sequence of FveD27 gene in PCR amplification;FveD27 NCBI-Pseq:FveD27 NCBI氨基酸序列, Amino acid sequence of FveD27 in NCBI;FveD27 RNA-Pseq:FveD27转录组测序氨基酸序列 Amino acid sequence of FveD27 in RNA-seq;FveD27 PCR-Pseq:FveD27 PCR扩增氨基酸序列 Amino acid sequence of FveD27 in PCR amplification A:FveD27基因序列比较;B:FveD27氨基酸序列比较 Fig. 2The sequencing alignment results of FveD27 sequence
A—D:非转基因植株的成熟叶片、幼苗、叶柄、根;E—H:转基因植株成熟的叶片、幼苗、叶柄、根。比例尺:1 mm Fig. 7GUS activity analysis in transgenic strawberry plants
A-D: Mature leaf, young plantlet, petiole and root of non-transgenic plants; E-H: Mature leaf, young plantlet, petiole and root of transgenic plants. Scale bar: 1mm
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