Ishida Juliane K, Yoshida Satoko, Shirasu Ken
a RIKEN Center for Sustainable Resource Science , Yokohama , Japan.
b Graduate School of Agricultural and Life Sciences , The University of Tokyo , Bunkyo , Tokyo , Japan.
Plant Signal Behav. 2017 Jul 3;12(7):e1319029. doi: 10.1080/15592324.2017.1319029. Epub 2017 May 12.
The family Orobanchaceae includes many parasitic plant species. Parasitic plants invade host vascular tissues and form organs called haustoria, which are used to obtain water and nutrients. Haustorium formation is initiated by host-derived chemicals including quinones and flavonoids. Two types of quinone oxidoreductase (QR) are involved in signal transduction leading to haustorium formation; QR1 mediates single-electron transfers and QR2 mediates 2-electron transfers. In the facultative parasite Triphysaria versicolor, QR1 is involved in haustorium induction signaling, while this role is played by QR2 in the model plant Phtheirospermum japonicum. Our results suggest that there is functional diversification in haustorium signaling molecules among different species of the Orobanchaceae.
列当科包含许多寄生植物物种。寄生植物侵入宿主维管组织并形成称为吸器的器官，这些吸器用于获取水分和养分。吸器的形成由包括醌类和黄酮类在内的宿主衍生化学物质引发。两种醌氧化还原酶（QR）参与导致吸器形成的信号转导；QR1介导单电子转移，QR2介导双电子转移。在兼性寄生植物多色三齿稃中，QR1参与吸器诱导信号传导，而在模式植物日本列当草中，这一作用由QR2发挥。我们的结果表明，列当科不同物种间吸器信号分子存在功能分化。
