The Strigolactone Germination Stimulants of the Plant-Parasitic<i>Striga</i>and<i>Orobanche</i>spp. Are Derived from the Carotenoid Pathway

• Radoslava Matusova

  Plant Research International, 6700 AA Wageningen, The Netherlands (R.M., K.R., F.W.A.V., H.J.B.); Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra, Slovakia (R.M.); Laboratory of Organic Chemistry, Wageningen University, 6703 HB Wageningen, The Netherlands (M.C.R.F.); and Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, United Kingdom (M.H.B.)

• Kumkum Rani

  Plant Research International, 6700 AA Wageningen, The Netherlands (R.M., K.R., F.W.A.V., H.J.B.); Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra, Slovakia (R.M.); Laboratory of Organic Chemistry, Wageningen University, 6703 HB Wageningen, The Netherlands (M.C.R.F.); and Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, United Kingdom (M.H.B.)

• Francel W.A. Verstappen

  Plant Research International, 6700 AA Wageningen, The Netherlands (R.M., K.R., F.W.A.V., H.J.B.); Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra, Slovakia (R.M.); Laboratory of Organic Chemistry, Wageningen University, 6703 HB Wageningen, The Netherlands (M.C.R.F.); and Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, United Kingdom (M.H.B.)

• Maurice C.R. Franssen

  Plant Research International, 6700 AA Wageningen, The Netherlands (R.M., K.R., F.W.A.V., H.J.B.); Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra, Slovakia (R.M.); Laboratory of Organic Chemistry, Wageningen University, 6703 HB Wageningen, The Netherlands (M.C.R.F.); and Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, United Kingdom (M.H.B.)

• Michael H. Beale

  Plant Research International, 6700 AA Wageningen, The Netherlands (R.M., K.R., F.W.A.V., H.J.B.); Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra, Slovakia (R.M.); Laboratory of Organic Chemistry, Wageningen University, 6703 HB Wageningen, The Netherlands (M.C.R.F.); and Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, United Kingdom (M.H.B.)

• Harro J. Bouwmeester

  Plant Research International, 6700 AA Wageningen, The Netherlands (R.M., K.R., F.W.A.V., H.J.B.); Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra, Slovakia (R.M.); Laboratory of Organic Chemistry, Wageningen University, 6703 HB Wageningen, The Netherlands (M.C.R.F.); and Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, United Kingdom (M.H.B.)

抄録

The seeds of parasitic plants of the genera Striga and Orobanche will only germinate after induction by a chemical signal exuded from the roots of their host. Up to now, several of these germination stimulants have been isolated and identified in the root exudates of a series of host plants of both Orobanche and Striga spp. In most cases, the compounds were shown to be isoprenoid and belong to one chemical class, collectively called the strigolactones, and suggested by many authors to be sesquiterpene lactones. However, this classification was never proven; hence, the biosynthetic pathways of the germination stimulants are unknown. We have used carotenoid mutants of maize (Zea mays) and inhibitors of isoprenoid pathways on maize, cowpea (Vigna unguiculata), and sorghum (Sorghum bicolor) and assessed the effects on the root exudate-induced germination of Striga hermonthica and Orobanche crenata. Here, we show that for these three host and two parasitic plant species, the strigolactone germination stimulants are derived from the carotenoid pathway. Furthermore, we hypothesize how the germination stimulants are formed. We also discuss this finding as an explanation for some phenomena that have been observed for the host-parasitic plant interaction, such as the effect of mycorrhiza on S. hermonthica infestation.

収録刊行物

• Plant Physiology

  Plant Physiology 139 (2), 920-934, 2005-09-23

  Oxford University Press (OUP)

キーワード

• Plant Science
• Genetics
• Physiology

詳細情報

• CRID: 1362544420340364672
• NII論文ID: 80017742840
• DOI: 10.1104/pp.105.061382
• ISSN: 15322548
• ISSN: 00320889
• ISSN: http://id.crossref.org/issn/00320889
• Web Site: http://academic.oup.com/plphys/article-pdf/139/2/920/37838649/plphys_v139_2_920.pdf
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