Integration of trap- and root-derived nitrogen nutrition of carnivorous Dionaea muscipula

© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 205(2015), 3 vom: 15. Feb., Seite 1320-1329
1. Verfasser: Gao, Peng (VerfasserIn)
Weitere Verfasser: Loeffler, Theresa Sofi, Honsel, Anne, Kruse, Jörg, Krol, Elzbieta, Scherzer, Sönke, Kreuzer, Ines, Bemm, Felix, Buegger, Franz, Burzlaff, Tim, Hedrich, Rainer, Rennenberg, Heinz
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't ammonium glutamine nitrogen (N) nutrition plant carnivory root : shoot integration Ammonium Compounds Carbon Isotopes Nitrogen Isotopes mehr... Plant Proteins Nitrogen N762921K75
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520 |a Carnivorous Dionaea muscipula operates active snap traps for nutrient acquisition from prey; so what is the role of D. muscipula's reduced root system? We studied the capacity for nitrogen (N) acquisition via traps, and its effect on plant allometry; the capacity of roots to absorb NO₃(-), NH₄(+) and glutamine from the soil solution; and the fate and interaction of foliar- and root-acquired N. Feeding D. muscipula snap traps with insects had little effect on the root : shoot ratio, but promoted petiole relative to trap growth. Large amounts of NH₄(+) and glutamine were absorbed upon root feeding. The high capacity for root N uptake was maintained upon feeding traps with glutamine. High root acquisition of NH₄(+) was mediated by 2.5-fold higher expression of the NH₄(+) transporter DmAMT1 in the roots compared with the traps. Electrophysiological studies confirmed a high constitutive capacity for NH₄(+) uptake by roots. Glutamine feeding of traps inhibited the influx of (15)N from root-absorbed (15)N/(13)C-glutamine into these traps, but not that of (13)C. Apparently, fed traps turned into carbon sinks that even acquired organic carbon from roots. N acquisition at the whole-plant level is fundamentally different in D. muscipula compared with noncarnivorous species, where foliar N influx down-regulates N uptake by roots 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a ammonium 
650 4 |a glutamine 
650 4 |a nitrogen (N) nutrition 
650 4 |a plant carnivory 
650 4 |a root : shoot integration 
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650 7 |a Carbon Isotopes  |2 NLM 
650 7 |a Nitrogen Isotopes  |2 NLM 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Loeffler, Theresa Sofi  |e verfasserin  |4 aut 
700 1 |a Honsel, Anne  |e verfasserin  |4 aut 
700 1 |a Kruse, Jörg  |e verfasserin  |4 aut 
700 1 |a Krol, Elzbieta  |e verfasserin  |4 aut 
700 1 |a Scherzer, Sönke  |e verfasserin  |4 aut 
700 1 |a Kreuzer, Ines  |e verfasserin  |4 aut 
700 1 |a Bemm, Felix  |e verfasserin  |4 aut 
700 1 |a Buegger, Franz  |e verfasserin  |4 aut 
700 1 |a Burzlaff, Tim  |e verfasserin  |4 aut 
700 1 |a Hedrich, Rainer  |e verfasserin  |4 aut 
700 1 |a Rennenberg, Heinz  |e verfasserin  |4 aut 
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