2008
DOI: 10.1038/nature07271
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Abstract: A carotenoid-derived hormonal signal that inhibits shoot branching in plants has long escaped identification. Strigolactones are compounds thought to be derived from carotenoids and are known to trigger the germination of parasitic plant seeds and stimulate symbiotic fungi. Here we present evidence that carotenoid cleavage dioxygenase 8 shoot branching mutants of pea are strigolactone deficient and that strigolactone application restores the wild-type branching phenotype to ccd8 mutants. Moreover, we show that… Show more

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Cited by 1,845 publications
(1,495 citation statements)
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References 47 publications
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“…Stem compounds of cowpea in the mycorrhizal treatment resulted in a lower germination of S. hermonthica seeds compared to the nonmycorrhizal treatment, indicating that in mycorrhizal plants, the levels of Striga seed-germination-stimulating compounds are altered not only in mycorrhizal roots but also in aboveground parts of mycorrhizal plants. These observations are of relevance in the light of the recent discovery that strigolactones act as shoot hormones that regulate shoot branching (Umehara et al 2008;Gomez-Roldan et al 2008). Firstly, this role as shoot branching hormones indicates the presence of strigolactones in the shoot of plants, and secondly, if strigolactones are present in the shoot and their level is altered by mycorrhization, this may contribute to alterations in the shoot branching pattern of mycorrhizal plants.…”
Section: Discussionmentioning
confidence: 75%
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“…Stem compounds of cowpea in the mycorrhizal treatment resulted in a lower germination of S. hermonthica seeds compared to the nonmycorrhizal treatment, indicating that in mycorrhizal plants, the levels of Striga seed-germination-stimulating compounds are altered not only in mycorrhizal roots but also in aboveground parts of mycorrhizal plants. These observations are of relevance in the light of the recent discovery that strigolactones act as shoot hormones that regulate shoot branching (Umehara et al 2008;Gomez-Roldan et al 2008). Firstly, this role as shoot branching hormones indicates the presence of strigolactones in the shoot of plants, and secondly, if strigolactones are present in the shoot and their level is altered by mycorrhization, this may contribute to alterations in the shoot branching pattern of mycorrhizal plants.…”
Section: Discussionmentioning
confidence: 75%
“…Recently, strigolactones have been identified as a new class of plant hormones regulating shoot branching, suggesting their presence in above-ground plant organs (Gomez-Roldan et al 2008;Umehara et al 2008). By testing the effect of compounds released by excised stem pieces of maize, cowpea, and soybean on Striga seeds, the presence of seed-germination-stimulating compounds, possibly strigolactones, in stems has been reported (Emechebe and Ahonsi 2003).…”
Section: Introductionmentioning
confidence: 99%
“…The symbiotic phenotype of pdr1 and dad1 mutants, and the induction of PDR1 expression in colonized root segments, suggests that strigolactones play an additional role in promoting sustained intercellular root colonization, whereas intracellular stages (for example, arbuscules) develop independently of strigolactones ( Fig. 2e-h).Recently, it was demonstrated that strigolactones inhibit shoot branching 5,6 . Although certain aspects of strigolactone biosynthesis and signalling have been unravelled 25 , information about the mode of strigolactone transport is scant.…”
mentioning
confidence: 95%
“…As a control, root exudates of dad1 mutants from the P. hybrida cultivar V26 were used. DAD1 encodes carotenoid cleavage dioxygenase 8 (CCD8) 20 and is an orthologue of the established strigolactonebiosynthesis genes RMS1, MAX4 and D10 in Pisum sativum (pea), Arabidopsis and rice, respectively 5,6 . The germination rate of P. ramosa was significantly lower in the presence of root exudates from W115 3 W138-pdr1 or dad1 mutants than root exudates from the corresponding wild-type plants, which induced germination to a similar extent to GR24 (Fig.…”
mentioning
confidence: 99%
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