PMID: 11604462Oct 18, 2001Paper

Sunflower (Helianthus annuus L.) response to broomrape (Orobanche cernua Loefl.) parasitism: induced synthesis and excretion of 7-hydroxylated simple coumarins

Journal of Experimental Botany
K SerghiniJ Jorrín

Abstract

The interaction of the parasitic plant Orobanche cernua with resistant and susceptible cultivars of Helianthus annuus L. was investigated. Using different bioassays to evaluate the early stages of the parasite life cycle (germination, attachment, penetration, and establishment), differences were observed between O. cernua-resistant and O. cernua-susceptible sunflower varieties. Germination of O. cernua seeds in the presence of resistant sunflower roots was approximately half that of germination in the presence of susceptible roots, and germinated seeds displayed enhanced browning symptoms. Parasite radicles or host-tissue around the contact point turned brown after O. cernua attachment to sunflower roots, especially in the resistant varieties. These observations suggested the possible accumulation of toxic compounds as a defence strategy in the resistant sunflower varieties. Sunflower 7-hydroxylated simple coumarins may play a defensive role against O. cernua parasitism by preventing successful germination, penetration and/or connection to the host vascular system. This hypothesis is supported by the following data: (i) coumarins inhibited the in vitro germination of O. cernua seeds induced by the strigol analogue GR(24) and ca...Continue Reading

References

Oct 1, 1996·The Plant Cell·A. O. Jackson, C. B. Taylor

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Citations

Mar 22, 2007·Planta·Axel de ZélicourtPhilippe Delavault
Aug 12, 2010·Bioscience, Biotechnology, and Biochemistry·Hiroaki Ueda, Yukihiro Sugimoto
Jan 9, 2020·Journal of Experimental Botany·Connor R Fitzpatrick, Adam C Schneider
Mar 25, 2006·Journal of Experimental Botany·Alejandro Pérez-de-LuqueDiego Rubiales
Apr 21, 2009·Molecular Ecology·C J ThorogoodS J Hiscock
Feb 9, 2007·The New Phytologist·N RispailD Rubiales
Oct 17, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Arūnas Krikštaponis, Rolandas Meškys
Nov 19, 2020·Plants·Clara Isabel González-VerdejoSalvador Nadal
Dec 3, 2020·International Journal of Molecular Sciences·Luyang HuWeijun Zhou
Aug 19, 2007·Plant Physiology·M Dolores Lozano-BaenaAlejandro Pérez-de-Luque
Jun 11, 2009·Journal of Agricultural and Food Chemistry·Francisco A MacíasJuan C G Galindo
Apr 10, 2007·Trends in Plant Science·Harro J BouwmeesterGuillaume Bécard
Sep 21, 2013·Journal of Agricultural and Food Chemistry·Mónica Fernández-AparicioDiego Rubiales
Mar 21, 2002·Journal of Agricultural and Food Chemistry·Juan C G GalindoFrancisco A Macías
Nov 7, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Mónica Fernández-AparicioBegoña Pérez-Vich

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