NDLI: Contents and flows of assimilates (mannitol and sucrose) in the hemiparasiticRhinanthus minor/Hordeum vulgare association

Content Provider	Springer Nature Link
Author	Jiang, Fan Dieter Jeschke, W. Hartung, Wolfram
Copyright Year	2005
Abstract	Using the facultative root hemiparasiteRhinanthus minor andHordeum vulgare as a host, the flows and partitioning of mannitol in the parasite, and of sucrose in the host have been studied during the period of 41 to 54 days after planting, i.e, about 30 to 43 days after successful attachment of the parasite to the host. The biosynthesis of mannitol inRhinanthus shoots increased 16-fold by parasitism, resulting in a 15-fold higher mannitol flow in the phloem and a 10-fold higher deposition in the shoot. Under reduced nitrogen supply and with ammonium as the only N-form the concentrations of mannitol tended to be increased by approximately 2-fold. Xylem flows of mannitol were increased 10-fold after attachment. No mannitol was found in barley roots even in the direct vicinity of the haustoria. Compared to unparasitized barley, the net biosynthesis and deposition in the shoot and the phloem flow was decreased substantially. No sucrose has been detected in barley xylem sap and consequently there was no indication of a sucrose transfer from the host to the parasite. A possible involvement of mannitol in the abscisic acid relations of the parasite is discussed.
Starting Page	195
Ending Page	203
Page Count	9
File Format	PDF
ISSN	12119520
Journal	Folia Geobotanica
Volume Number	40
Issue Number	2-3
e-ISSN	18749348
Language	English
Publisher	Springer Netherlands
Publisher Date	2005-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hordeum vulgare Mannitol Rhinanthus minor Sucrose Life Sciences Plant Sciences Plant Systematics/Taxonomy/Biogeography Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Paleontology

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