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- 저자 : Honaas, Loren (검색결과 1 건)
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Genome Sequence of <i>Striga asiatica</i> Provides Insight into the Evolution of Plant Parasitism
Yoshida, Satoko,Kim, Seungill,Wafula, Eric K.,Tanskanen, Jaakko,Kim, Yong-Min,Honaas, Loren,Yang, Zhenzhen,Spallek, Thomas,Conn, Caitlin E.,Ichihashi, Yasunori,Cheong, Kyeongchae,Cui, Songkui,Der, Jos Elsevier 2019 Current biology Vol.29 No.18
<P><B>Summary</B></P> <P>Parasitic plants in the genus <I>Striga</I>, commonly known as witchweeds, cause major crop losses in sub-Saharan Africa and pose a threat to agriculture worldwide. An understanding of <I>Striga</I> parasite biology, which could lead to agricultural solutions, has been hampered by the lack of genome information. Here, we report the draft genome sequence of <I>Striga asiatica</I> with 34,577 predicted protein-coding genes, which reflects gene family contractions and expansions that are consistent with a three-phase model of parasitic plant genome evolution. <I>Striga</I> seeds germinate in response to host-derived strigolactones (SLs) and then develop a specialized penetration structure, the haustorium, to invade the host root. A family of SL receptors has undergone a striking expansion, suggesting a molecular basis for the evolution of broad host range among <I>Striga</I> spp. We found that genes involved in lateral root development in non-parasitic model species are coordinately induced during haustorium development in <I>Striga</I>, suggesting a pathway that was partly co-opted during the evolution of the haustorium. In addition, we found evidence for horizontal transfer of host genes as well as retrotransposons, indicating gene flow to <I>S. asiatica</I> from hosts. Our results provide valuable insights into the evolution of parasitism and a key resource for the future development of <I>Striga</I> control strategies.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The <I>Striga</I> genome reflects a three-phase model of parasitic plant genome evolution </LI> <LI> A family of strigolactone receptors has undergone a striking expansion in <I>Striga</I> </LI> <LI> Genes in lateral root development are coordinately induced in a parasitic organ </LI> <LI> Host genes and retrotransposons are horizontally transferred into <I>Striga</I> </LI> </UL> </P>
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