Title : How do Orobanchaceae parasitic plants grow their roots toward host roots?
Talks : Dr.Satoshi Ogawa (JSPS PD Researcher, Center for Sustainable Resource Science,
RIKEN, Japan (Ken Shirasu Laboratory))
RIKEN, Japan (Ken Shirasu Laboratory))
Data : Tuesday, November 28. 15:00-16:00
Venue : Hybrid
(On-site): Katahira campus, Life Sciences Project Research Laboratory, Meeting Room 103
(On-line):
https://us06web.zoom.us/meeting/register/tZIpf-itpj8qE9UyweEDPxZBMd9EUOUeLhIA
(On-site): Katahira campus, Life Sciences Project Research Laboratory, Meeting Room 103
(On-line):
https://us06web.zoom.us/meeting/register/tZIpf-itpj8qE9UyweEDPxZBMd9EUOUeLhIA
Abstract
Orobanchaceae root parasitic plants deprive their host plants of nutrients and water by establishing connections between their roots and those of host roots. Some species are devastating for major crops, causing annual losses of several billion dollars. To prevent infestation by these parasites, it is crucial to understand the molecular mechanisms that regulate parasitism. Orobanchaceae parasitic plants have evolved the ability to direct their root growth towards hosts, known as host tropism, to ensure accurate parasitism. However, the underlying molecular mechanisms remained largely elusive. To characterize host tropism, we used the model facultative root parasite Phtheirospermum japonicum, capable of surviving with or without hosts. We showed that host-derived strigolactones (SLs) act as chemoattractants for host tropism. Furthermore, we demonstrated that SLs trigger an asymmetric auxin response in P. japonicum roots, which is impaired under ammonium-rich conditions. We have also identified SL receptors that contribute to host tropism. In parallel with host tropism, I will present another recently uncovered molecular basis modulating parasitism in Orobanchaceae parasites.
Orobanchaceae root parasitic plants deprive their host plants of nutrients and water by establishing connections between their roots and those of host roots. Some species are devastating for major crops, causing annual losses of several billion dollars. To prevent infestation by these parasites, it is crucial to understand the molecular mechanisms that regulate parasitism. Orobanchaceae parasitic plants have evolved the ability to direct their root growth towards hosts, known as host tropism, to ensure accurate parasitism. However, the underlying molecular mechanisms remained largely elusive. To characterize host tropism, we used the model facultative root parasite Phtheirospermum japonicum, capable of surviving with or without hosts. We showed that host-derived strigolactones (SLs) act as chemoattractants for host tropism. Furthermore, we demonstrated that SLs trigger an asymmetric auxin response in P. japonicum roots, which is impaired under ammonium-rich conditions. We have also identified SL receptors that contribute to host tropism. In parallel with host tropism, I will present another recently uncovered molecular basis modulating parasitism in Orobanchaceae parasites.
Contact:
Plant Development
Prof. KYOZUKA Junko
E-mail:junko.kyozuka.e4(at)tohoku.ac.jp
Plant Development
Prof. KYOZUKA Junko
E-mail:junko.kyozuka.e4(at)tohoku.ac.jp