Secondary metabolite signalling in host–parasitic plant interactions

Bouwmeester, Harro J.; Matúšová, Radoslava; Sun, Zhian; Beale, Michael H.

doi:10.1016/s1369-5266(03)00065-7

Cited by 369 publications

(275 citation statements)

References 32 publications

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“…Seeds were considered to be germinated if the radicle protruded through the seed coat. Although germination of Striga can be induced by several diVerent chemical compounds in vitro, the evidence is accumulating that in plant root exudates the strigolactones are the major factor responsible (Bouwmeester et al 2003. For ZmCCD1 transcript analysis, maize (cv dwarf-1) was grown in expanded clay in 250-mL plastic pots under a 16-h light/8-h dark regime in a growth chamber at 25°C.…”

Section: Plant Materials and Chemicalsmentioning

confidence: 99%

“…1), which form a separate group of structurally closely related molecules (Bouwmeester et al 2003). Strigolactones are germination stimulants of the root parasitic Striga spp.…”

Section: Introductionmentioning

confidence: 99%

“…and Orobanche spp., obligate parasitic plants that can only survive and reproduce when attached to the root of a host plant from which they obtain water, nutrients and assimilates. The seeds of these parasitic plants will only germinate in the presence of these germination stimulants (Bouwmeester et al 2003). Interestingly, these strigolactones also induce branching in germinating AM fungal spores, a process required for host root colonisation (Akiyama et al 2005;Besserer et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Cloning and characterisation of a maize carotenoid cleavage dioxygenase (ZmCCD1) and its involvement in the biosynthesis of apocarotenoids with various roles in mutualistic and parasitic interactions

Sun¹,

Hans

Walter

et al. 2008

Planta

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Colonisation of maize roots by arbuscular mycorrhizal (AM) fungi leads to the accumulation of apocarotenoids (cyclohexenone and mycorradicin derivatives). Other root apocarotenoids (strigolactones) are involved in signalling during early steps of the AM symbiosis but also in stimulation of germination of parasitic plant seeds. Both apocarotenoid classes are predicted to originate from cleavage of a carotenoid substrate by a carotenoid cleavage dioxygenase (CCD), but the precursors and cleavage enzymes are unknown. A Zea mays CCD (ZmCCD1) was cloned by RT-PCR and characterised by expression in carotenoid accumulating E. coli strains and analysis of cleavage products using GC-MS. ZmCCD1 eYciently cleaves carotenoids at the 9, 10 position and displays 78% amino acid identity to Arabidopsis thaliana CCD1 having similar properties. ZmCCD1 transcript levels were shown to be elevated upon root colonisation by AM fungi. Mycorrhization led to a decrease in seed germination of the parasitic plant Striga hermonthica as examined in a bioassay. ZmCCD1 is proposed to be involved in cyclohexenone and mycorradicin formation in mycorrhizal maize roots but not in strigolactone formation.

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Section: Plant Materials and Chemicalsmentioning

confidence: 99%

“…1), which form a separate group of structurally closely related molecules (Bouwmeester et al 2003). Strigolactones are germination stimulants of the root parasitic Striga spp.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cloning and characterisation of a maize carotenoid cleavage dioxygenase (ZmCCD1) and its involvement in the biosynthesis of apocarotenoids with various roles in mutualistic and parasitic interactions

Sun¹,

Hans

Walter

et al. 2008

Planta

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“…(Orobanchaceae) (witchweed). This phytoparasite produces thousands of minute seeds that germinate in the presence of strigolactones (Bouwmeester et al 2003Steinkellner et al 2007) exuded from the roots of the cereal hosts. After germination, the phytoparasite attaches to the roots of the host plant, forming haustoria.…”

Section: Introductionmentioning

confidence: 99%

Striga seed-germination activity of root exudates and compounds present in stems of Striga host and nonhost (trap crop) plants is reduced due to root colonization by arbuscular mycorrhizal fungi

2009

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Striga seed-germination activity of root exudates and compounds present in stems of Striga host and nonhost (trap crop) plants is reduced due to root colonization by arbuscular mycorrhizal fungi Abstract Root colonization by arbuscular mycorrhizal (AM) fungi reduces stimulation of seed germination of the plant parasite Striga (Orobanchaceae). This reduction can affect not only host plants for Striga, resulting in a lower parasite incidence, but also false hosts or trap crops, which induce suicidal Striga seed germination, thereby diminishing their effectiveness. In order to better understand these AM-induced effects, we tested the influence of root colonization by different AM fungi on the seed-germination activity of root exudates of the Striga hermonthica nonhost plants cowpea and cotton on S. hermonthica. We also tested the effect of AM fungi on the seed-germination activity of the Striga gesnerioides host plant cowpea on S. gesnerioides. Moreover, we studied whether mycorrhization affects the transport of seedgermination activity to above-ground plant parts. Mycorrhization not only resulted in a lower seed germination of S. gesnerioides in the presence of root exudates of the S. gesnerioides host cowpea but also seed germination of S. hermonthica was also lower in the presence of root exudates of the S. hermonthica nonhosts cowpea and cotton. Downregulation of the Striga seedgermination activity occurs not only in root exudates upon root colonization by different AM fungi but also in the compounds produced by stems. The lowered seedgermination activity does not appear to depend on the presence of seed germination inhibitors in the root exudates of mycorrhizal plants. The implication for Striga control in the field is discussed.

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“…Striga seeds require a period of pre-treatment, conditioning in a moist warm environment (30°C in germination bioassays) for 2 to 16 days before they acquire potential to germinate (Longan and Stewart, 1991;Parker and Riches, 1993). After this phase, germination of Striga seeds will be initiated only upon induction by some specific chemicals, such as strigolactones, released by the host roots into the rhizosphere (Bouwmeester et al, 2003;Matusova et al, 2005;Shen et al, 2006;Yoneyama et al, 2010;Xie et al, 2010). The concentration of such chemicals is very low and ranges from 10 -10 to 10 -15 mole m -3 (Hearne, 2009).…”

Section: Biologymentioning

confidence: 99%