Dependence of root parasitic plants on host-derived strigolactones

2013 Fiscal Year Final Research Report

• Project/Area Number: 24658111
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Bioproduction chemistry/Bioorganic chemistry
• Research Institution: Kobe University
• Principal Investigator: SUGIMOTO Yukihiro 神戸大学, (連合)農学研究科(研究院), 教授 (10243411)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 根寄生植物 / ストライゴラクトン / 生合成 / 要求性

Research Abstract

Strigolactones (SLs) are a class of plant hormones that regulate plant architecture as well as being known as root-derived signals for symbiosis and parasitism. This study examined 1) whether Striga hermonthica, a root parasitic plant, whose seed germination is triggered by SLs, produces SLs, and 2) the effect of SLs provided by the host on morphology of the parasite. The level of SLs in Striga plants growing on agar, independent of host, was below the detection limit of LC-MS analysis while SL spectra detected in Striga plants were consistent with those in their respective hosts. Striga plants growing on SL-deficient rice mutants formed leaves abnormal in shape and number. These results suggest that SL production in Striga, if any, is very limited and that SLs provided by host plants regulate not only germination of Striga seeds but also the parasite morphology.

Research Products

• [Journal Article] Structural requirements of strigolactones for germination induction and inhibition of Striga gesnerioides seeds (2013)
  • Author(s): Nomura, S., Nakashima, H., Mizutani, M., Takikawa, H., Sugimoto, Y.
  • Journal Title: Plant Cell Reports Volume: 32 (6) Pages: 829-838
  • Peer Reviewed
• [Journal Article] Bioconversion of 5- deoxystrigol to sorgomol by the sorghum, Sorghum bicolor (L.) (2013)
  • Author(s): Motonami, N., Ueno, K., Nakashima, H., Nomura, S., Mizutani, M., Takikawa, H., Sugimoto, Y.
  • Journal Title: Moench, Phytochemistry Volume: 93 Pages: 41-48
  • Peer Reviewed
• [Presentation] Structural requirements of strigolactones for germination induction and inhibition of Striga gesnerioides seeds (2013)
  • Author(s): Sugimoto, Y., Nomura, S., Nakashima, H., Mizutani, M., Takikawa, H
  • Organizer: 12^<th> World Congress of Parasitic Plants
  • Place of Presentation: Sheffield, UK
  • Year and Date: 20130715-20
• [Presentation] The bioconversion of 5-deoxystrigol to monohydroxylated strigolactones by plants (2013)
  • Author(s): Ueno, K., Motonami, N., Nakashima, H., Nomura, S., Mizutani, M., Takikaw,a H., Sugimoto, Y.
  • Organizer: 12^<th> World Congress of Parasitic Plants
  • Place of Presentation: Sheffield, UK
  • Year and Date: 20130715-20
• [Presentation] Oxidative Bioconversion of a Synthetic Strigolactone Analog GR24 in the Root Cultures of Menispermum dauricum (2012)
  • Author(s): Mizutani, M., Hiragakiuchi, M., Nakashima, H., Motonami, N., Ueno, K., Takikawa, H., Sugimoto, Y.
  • Organizer: 10^<th> International Congress on Plant Molecular Biology
  • Place of Presentation: Jeju, Korea
  • Year and Date: 20121021-26
• [Presentation] Oxidation of 5-deoxystrigol in sorghum, Sorghum bicolor (L.) Moech (2012)
  • Author(s): Motonami, N., Nakashima, H., Ueno, K., Mizutani, M., Takikawa, H. Sugimoto, Y.
  • Organizer: 10^<th> International Congress on Plant Molecular Biology
  • Place of Presentation: Jeju, Korea
  • Year and Date: 20121021-26