%0 Journal Article %1 RN1067 %A Gao, P. %A Loeffler, T. S. %A Honsel, A. %A Kruse, J. %A Krol, E. %A Scherzer, S. %A Kreuzer, I. %A Bemm, F. %A Buegger, F. %A Burzlaff, T. %A Hedrich, R. %A Rennenberg, H. %D 2015 %J New Phytologist %K ammonium myOwn %N 3 %P 1320-1329 %R 10.1111/nph.13120 %T Integration of trap- and root-derived nitrogen nutrition of carnivorous %U /brokenurl#<Go to ISI>://WOS:000348730600041 %V 205 %X 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 N-15 from root-absorbed N-15/C-13-glutamine into these traps, but not that of C-13. 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.

@article{RN1067, abstract = {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 N-15 from root-absorbed N-15/C-13-glutamine into these traps, but not that of C-13. 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.}, added-at = {2024-02-14T14:38:32.000+0100}, author = {Gao, P. and Loeffler, T. S. and Honsel, A. and Kruse, J. and Krol, E. and Scherzer, S. and Kreuzer, I. and Bemm, F. and Buegger, F. and Burzlaff, T. and Hedrich, R. and Rennenberg, H.}, biburl = {https://www.bibsonomy.org/bibtex/2bedb037dd868678a66b6e95a5fdfe346/rainerhedrich_2}, doi = {10.1111/nph.13120}, interhash = {9c053894deab62e60339ed2aea787102}, intrahash = {bedb037dd868678a66b6e95a5fdfe346}, issn = {0028-646x}, journal = {New Phytologist}, keywords = {ammonium myOwn}, note = {Ca2hx Times Cited:21 Cited References Count:41}, number = 3, pages = {1320-1329}, timestamp = {2024-02-14T14:38:32.000+0100}, title = {Integration of trap- and root-derived nitrogen nutrition of carnivorous}, type = {Journal Article}, url = {/brokenurl#<Go to ISI>://WOS:000348730600041}, volume = 205, year = 2015 }