論文

査読有り 国際誌
2020年7月17日

An auxin transport network underlies xylem bridge formation between the hemi-parasitic plant Phtheirospermum japonicum and host Arabidopsis.

Development (Cambridge, England)
  • Takanori Wakatake
  • ,
  • Satoshi Ogawa
  • ,
  • Satoko Yoshida
  • ,
  • Ken Shirasu

147
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記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1242/dev.187781

Parasitic plants form vascular connections with host plants for efficient material transport. The haustorium is the responsible organ for host invasion and subsequent vascular connection. After invasion of host tissues, vascular meristem-like cells emerge in the central region of the haustorium, differentiate into tracheary elements and establish a connection, known as a xylem bridge, between parasite and host xylem systems. Despite the importance of this parasitic connection, the regulatory mechanisms of xylem bridge formation are unknown. Here, we show the role of auxin and auxin transporters during the process of xylem bridge formation using an Orobanchaceae hemiparasitic plant, Phtheirospermum japonicum The auxin response marker DR5 has a similar expression pattern to tracheary element differentiation genes in haustoria. Auxin transport inhibitors alter tracheary element differentiation in haustoria, but biosynthesis inhibitors do not, demonstrating the importance of auxin transport during xylem bridge formation. The expression patterns and subcellular localization of PIN family auxin efflux carriers and AUX1/LAX influx carriers correlate with DR5 expression patterns. The cooperative action of auxin transporters is therefore responsible for controlling xylem vessel connections between parasite and host.

リンク情報
DOI
https://doi.org/10.1242/dev.187781
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/32586973
ID情報
  • DOI : 10.1242/dev.187781
  • PubMed ID : 32586973

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