Daniel Maurer1, Daniel Weber2, Eva Ballering1,3, Salah Alfarraj4, Gada Albasher4, Rainer Hedrich5, Christiane Werner3, Heinz Rennenberg1,4. 1. Chair of Tree Physiology, Institute of Forest Sciences, University of Freiburg, Freiburg, Germany. 2. Phytoprove Plant Analytics UG, Senckenberg Biodiversity & Climate Research Centre, Frankfurt am Main, Germany. 3. Chair of Ecosystem Physiology, Institute of Forest Sciences, University of Freiburg, Freiburg, Germany. 4. College of Sciences, King Saud University, Riyadh, Saudi Arabia. 5. Institute for Molecular Plant Physiology and Biophysics, Biocenter, University of Würzburg, Würzburg, Germany.
Abstract
BACKGROUND AND AIMS: The processes connected with prey capture and the early consumption of prey by carnivorous Dionaea muscipula require high amounts of energy. The aim of the present study was to identify processes involved in flytrap energy provision and ATP homeostasis under these conditions. METHODS: We determined photosynthetic CO2 uptake and chlorophyll fluorescence as well as the dynamics of ATP contents in the snap traps upon closure with and without prey. KEY RESULTS: The results indicate that upon prey capture, a transient switch from linear to cyclic electron transport mediates a support of ATP homeostasis. Beyond 4 h after prey capture, prey resources contribute to the traps' ATP pool and, 24 h after prey capture, export of prey-derived resources to other plant organs may become preferential and causes a decline in ATP contents. CONCLUSIONS: Apparently, the energy demand of the flytrap for prey digestion and nutrient mining builds on both internal and prey-derived resources.
BACKGROUND AND AIMS: The processes connected with prey capture and the early consumption of prey by carnivorous Dionaea muscipula require high amounts of energy. The aim of the present study was to identify processes involved in flytrap energy provision and ATP homeostasis under these conditions. METHODS: We determined photosynthetic CO2 uptake and chlorophyll fluorescence as well as the dynamics of ATP contents in the snap traps upon closure with and without prey. KEY RESULTS: The results indicate that upon prey capture, a transient switch from linear to cyclic electron transport mediates a support of ATP homeostasis. Beyond 4 h after prey capture, prey resources contribute to the traps' ATP pool and, 24 h after prey capture, export of prey-derived resources to other plant organs may become preferential and causes a decline in ATP contents. CONCLUSIONS: Apparently, the energy demand of the flytrap for prey digestion and nutrient mining builds on both internal and prey-derived resources.
Authors: M D Cetner; H M Kalaji; V Goltsev; V Aleksandrov; K Kowalczyk; W Borucki; A Jajoo Journal: Plant Physiol Biochem Date: 2017-08-24 Impact factor: 4.270