Abstract：
:Glucosinolates (GSLs) and their hydrolysis products present in Brassicales play important roles in plants against herbivores and pathogens as well as in the protection of human health. To elucidate the molecular mechanisms underlying the formation of species-specific GSLs and their hydrolysed products in Raphanus sativus L., we performed a comparative genomics analysis between R. sativus and Arabidopsis thaliana. In total, 144 GSL metabolism genes were identified, and most of these GSL genes have expanded through whole-genome and tandem duplication in R. sativus. Crucially, the differential expression of FMOGS-OX2 in the root and silique correlates with the differential distribution of major aliphatic GSL components in these organs. Moreover, MYB118 expression specifically in the silique suggests that aliphatic GSL accumulation occurs predominantly in seeds. Furthermore, the absence of the expression of a putative non-functional epithiospecifier (ESP) gene in any tissue and the nitrile-specifier (NSP) gene in roots facilitates the accumulation of distinctive beneficial isothiocyanates in R. sativus. Elucidating the evolution of the GSL metabolic pathway in R. sativus is important for fully understanding GSL metabolic engineering and the precise genetic improvement of GSL components and their catabolites in R. sativus and other Brassicaceae crops.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wang J,Qiu Y,Wang X,Yue Z,Yang X,Chen X,Zhang X,Shen D,Wang H,Song J,He H,Li Xdoi
10.1038/s41598-017-16306-4subject
Has Abstractpub_date
2017-11-22 00:00:00pages
16040issue
1issn
2045-2322pii
10.1038/s41598-017-16306-4journal_volume
7pub_type
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