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Dehydrocostus lactone is exuded from sunflower roots and stimulates germination of the root parasite Orobanche cumana
Year:
2011
Source of publication :
Phytochemistry
Authors :
Joel, Daniel M.
;
.
Ziadna, Hammam
;
.
Volume :
72
Co-Authors:
Joel, D.M., Division of Weed Research, ARO, Newe-ya'ar Research Center, 30095 Ramat-Yishay, Israel
Chaudhuri, S.K., Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, United States, Monsanto, 37437 State Highway 16, Woodland, CA 95695-9353, United States
Plakhine, D., Division of Weed Research, ARO, Newe-ya'ar Research Center, 30095 Ramat-Yishay, Israel
Ziadna, H., Division of Weed Research, ARO, Newe-ya'ar Research Center, 30095 Ramat-Yishay, Israel
Steffens, J.C., Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, United States, Syngenta Biotechnology, Inc., 3054 E. Cornwallis Road, Research Triangle Park, NC 27709-2257, United States
Facilitators :
From page:
624
To page:
634
(
Total pages:
11
)
Abstract:
The germination of the obligate root parasites of the Orobanchaceae depends on the perception of chemical stimuli from host roots. Several compounds, collectively termed strigolactones, stimulate the germination of the various Orobanche species, but do not significantly elicit germination of Orobanche cumana, a specific parasite of sunflower. Phosphate starvation markedly decreased the stimulatory activity of sunflower root exudates toward O. cumana, and fluridone - an inhibitor of the carotenoid biosynthesis pathway - did not inhibit the production of the germination stimulant in both shoots and roots of young sunflower plants, indicating that the stimulant is not a strigolactone. We identified the natural germination stimulant from sunflower root exudates by bioassay-driven purification. Its chemical structure was elucidated as the guaianolide sesquiterpene lactone dehydrocostus lactone (DCL). Low DCL concentrations effectively stimulate the germination of O. cumana seeds but not of Phelipanche aegyptiaca (syn. Orobanche aegyptiaca). DCL and other sesquiterpene lactones were found in various plant organs, but were previously not known to be exuded to the rhizosphere where they can interact with other organisms. © 2011 Elsevier Ltd. All rights reserved.
Note:
Related Files :
Bioassay
drug effect
germination
Helianthus annuus
metabolism
Orobanche
rhizosphere
sesquiterpene
Show More
Related Content
More details
DOI :
10.1016/j.phytochem.2011.01.037
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30600
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:55
Scientific Publication
Dehydrocostus lactone is exuded from sunflower roots and stimulates germination of the root parasite Orobanche cumana
72
Joel, D.M., Division of Weed Research, ARO, Newe-ya'ar Research Center, 30095 Ramat-Yishay, Israel
Chaudhuri, S.K., Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, United States, Monsanto, 37437 State Highway 16, Woodland, CA 95695-9353, United States
Plakhine, D., Division of Weed Research, ARO, Newe-ya'ar Research Center, 30095 Ramat-Yishay, Israel
Ziadna, H., Division of Weed Research, ARO, Newe-ya'ar Research Center, 30095 Ramat-Yishay, Israel
Steffens, J.C., Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, United States, Syngenta Biotechnology, Inc., 3054 E. Cornwallis Road, Research Triangle Park, NC 27709-2257, United States
Dehydrocostus lactone is exuded from sunflower roots and stimulates germination of the root parasite Orobanche cumana
The germination of the obligate root parasites of the Orobanchaceae depends on the perception of chemical stimuli from host roots. Several compounds, collectively termed strigolactones, stimulate the germination of the various Orobanche species, but do not significantly elicit germination of Orobanche cumana, a specific parasite of sunflower. Phosphate starvation markedly decreased the stimulatory activity of sunflower root exudates toward O. cumana, and fluridone - an inhibitor of the carotenoid biosynthesis pathway - did not inhibit the production of the germination stimulant in both shoots and roots of young sunflower plants, indicating that the stimulant is not a strigolactone. We identified the natural germination stimulant from sunflower root exudates by bioassay-driven purification. Its chemical structure was elucidated as the guaianolide sesquiterpene lactone dehydrocostus lactone (DCL). Low DCL concentrations effectively stimulate the germination of O. cumana seeds but not of Phelipanche aegyptiaca (syn. Orobanche aegyptiaca). DCL and other sesquiterpene lactones were found in various plant organs, but were previously not known to be exuded to the rhizosphere where they can interact with other organisms. © 2011 Elsevier Ltd. All rights reserved.
Scientific Publication
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