Haplotype-resolved genome of Mimosa bimucronata revealed insights into leaf movement and nitrogen fixation
文献类型： 外文期刊
作者： Jia, Haifeng 1 ; Lin, Jishan 2 ; Lin, Zhicong 3 ; Wang, Yibin 4 ; Xu, Liangwei 1 ; Ding, Wenjie 1 ; Ming, Ray 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Agr, Ctr Genom & Biotechnol, Fuzhou 350002, Peoples R China
2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Natl Key Lab Trop Crop Breeding, Haikou 570100, Peoples R China
3.Putian Univ, Coll Environm & Biol Engn, Putian 351100, Peoples R China
4.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen 518120, Peoples R China
5.Fujian Agr & Forestry Univ, Coll Life Sci, Fuzhou 350002, Peoples R China
关键词： Mimosa bimucronata; Genome assembly; Leaf movements; Nitrogen fixation
期刊名称：BMC GENOMICS （ 影响因子：4.4； 五年影响因子：4.7 ）
ISSN： 1471-2164
年卷期： 2024 年 25 卷 1 期
页码：
收录情况： SCI
摘要： Background Mimosa bimucronata originates from tropical America and exhibits distinctive leaf movement characterized by a relative slow speed. Additionally, this species possesses the ability to fix nitrogen. Despite these intriguing traits, comprehensive studies have been hindered by the lack of genomic resources for M. bimucronata. Results To unravel the intricacies of leaf movement and nitrogen fixation, we successfully assembled a high-quality, haplotype-resolved, reference genome at the chromosome level, spanning 648 Mb and anchored in 13 pseudochromosomes. A total of 32,146 protein-coding genes were annotated. In particular, haplotype A was annotated with 31,035 protein-coding genes, and haplotype B with 31,440 protein-coding genes. Structural variations (SVs) and allele specific expression (ASE) analyses uncovered the potential role of structural variants in leaf movement and nitrogen fixation in M. bimucronata. Two whole-genome duplication (WGD) events were detected, that occurred similar to 2.9 and similar to 73.5 million years ago. Transcriptome and co-expression network analyses revealed the involvement of aquaporins (AQPs) and Ca2+-related ion channel genes in leaf movement. Moreover, we also identified nodulation-related genes and analyzed the structure and evolution of the key gene NIN in the process of symbiotic nitrogen fixation (SNF). Conclusion The detailed comparative genomic and transcriptomic analyses provided insights into the mechanisms governing leaf movement and nitrogen fixation in M. bimucronata. This research yielded genomic resources and provided an important reference for functional genomic studies of M. bimucronata and other legume species.
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