Evolution of plant parasitism revealed by <i>Striga</i> genome analysis

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  • Yoshida Satoko
    Division of Biological Sciences, Graduate School of Science and Technology, NAIST
  • Shirasu Ken
    Center for Sustainable Resource Science, RIKEN Graduate School of Sciences, The University of Tokyo

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  • ストライガのゲノム解析から見えてきた寄生植物の進化
  • ストライガ ノ ゲノム カイセキ カラ ミエテ キタ キセイ ショクブツ ノ シンカ

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Abstract

<p>Parasitic plants obtain nutrients and water from their angiosperm hosts via the infecting organ called haustorium.　Striga spp. are devastating parasitic weeds that parasitize important crops, such as maize, rice and sorghum, and therefore cause significant yield losses that are estimated as billion dollars annually.　Recent completion of Striga asiatica genome sequence provided us insights into evolution of parasitic plants.　Whole genome duplication in the Striga lineage and co-option of lateral root development programs may have brought innovation of haustorium formation.　The KAI2 genes encoding strigolactone receptors were locally duplicated in the Striga genome.　Furthermore, the large genome segments were horizontally transferred to Striga genome from their Poaceae hosts.　This article summarizes the Striga genome evolution together with recently-sequenced holoparasitic Cuscuta genomes.</p>

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