دورية أكاديمية
Dehydrocostus lactone is exuded from sunflower roots and stimulates germination of the root parasite Orobanche cumana.
| العنوان: | Dehydrocostus lactone is exuded from sunflower roots and stimulates germination of the root parasite Orobanche cumana. |
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| المؤلفون: | Joel DM; Division of Weed Research, ARO, Newe-Ya'ar Research Center, 30095 Ramat-Yishay, Israel. dmjoel@volcani.agri.gov.il, Chaudhuri SK, Plakhine D, Ziadna H, Steffens JC |
| المصدر: | Phytochemistry [Phytochemistry] 2011 May; Vol. 72 (7), pp. 624-34. Date of Electronic Publication: 2011 Feb 24. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: England NLM ID: 0151434 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3700 (Electronic) Linking ISSN: 00319422 NLM ISO Abbreviation: Phytochemistry Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2003- : London : Elsevier Original Publication: 1961-2003: Oxford : Pergamon Press. |
| مواضيع طبية MeSH: | Germination/*drug effects , Helianthus/*metabolism , Lactones/*metabolism , Lactones/*pharmacology , Orobanche/*drug effects , Orobanche/*physiology , Plant Roots/*metabolism , Sesquiterpenes/*metabolism , Sesquiterpenes/*pharmacology, Biological Assay ; Lactones/analysis ; Lactones/isolation & purification ; Rhizosphere ; Sesquiterpenes/analysis ; Sesquiterpenes/isolation & purification ; Species Specificity ; Structure-Activity Relationship |
| مستخلص: | 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. (Copyright © 2011 Elsevier Ltd. All rights reserved.) |
| المشرفين على المادة: | 0 (Lactones) 0 (Sesquiterpenes) 477-43-0 (dehydrocostus lactone) |
| تواريخ الأحداث: | Date Created: 20110301 Date Completed: 20110725 Latest Revision: 20110404 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1016/j.phytochem.2011.01.037 |
| PMID: | 21353686 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1873-3700 |
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| DOI: | 10.1016/j.phytochem.2011.01.037 |