Abstract:
BACKGROUND:Sucrose synthase (SUS) is widely considered a key enzyme participating in sucrose metabolism in higher plants and regarded as a biochemical marker for sink strength in crops. However, despite significant progress in characterizing the physiological functions of the SUS gene family, knowledge of the trajectory of evolutionary processes and significance of the family in higher plants remains incomplete. RESULTS:In this study, we identified over 100 SUS genes in 19 plant species and reconstructed their phylogenies, presenting a potential framework of SUS gene family evolution in higher plants. Three anciently diverged SUS gene subfamilies (SUS I, II and III) were distinguished based on their phylogenetic relationships and unique intron/exon structures in angiosperms, and they were found to have evolved independently in monocots and dicots. Each subfamily of SUS genes exhibited distinct expression patterns in a wide range of plants, implying that their functional differentiation occurred before the divergence of monocots and dicots. Furthermore, SUS III genes evolved under relaxed purifying selection in dicots and displayed narrowed expression profiles. In addition, for all three subfamilies of SUS genes, the GT-B domain was more conserved than the "regulatory" domain. CONCLUSIONS:The present study reveals the evolution of the SUS gene family in higher plants and provides new insights into the evolutionary conservation and functional divergence of angiosperm SUS genes.
journal_name
BMC Plant Bioljournal_title
BMC plant biologyauthors
Xu X,Yang Y,Liu C,Sun Y,Zhang T,Hou M,Huang S,Yuan Hdoi
10.1186/s12870-019-2181-4subject
Has Abstractpub_date
2019-12-18 00:00:00pages
566issue
1issn
1471-2229pii
10.1186/s12870-019-2181-4journal_volume
19pub_type
杂志文章abstract:BACKGROUND:Cannabis possesses a rich spectrum of phytochemicals i.e. cannabinoids, terpenes and phenolic compounds of industrial and medicinal interests. Most of these high-value plant products are synthesised in the disk cells and stored in the secretory cavity in glandular trichomes. Conventional trichome analysis wa...
journal_title:BMC plant biology
pub_type: 杂志文章
doi:10.1186/s12870-018-1481-4
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journal_title:BMC plant biology
pub_type: 杂志文章
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pub_type: 杂志文章,已发布勘误
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pub_type: 杂志文章
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pub_type: 杂志文章
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