Measuring Spatial and Temporal Oxygen Flux Near Plant Tissues Using a Self-Referencing Optrode
Self-referencing optrodic microsensing is a noninvasive method for measuring oxygen transport into/from tissues. The sensing mechanism is based on fluorescence quenching by molecular oxygen at the tip of a fiber-optic probe, and facilitates microscale spatial mapping and continuous monitoring at 100–350 mHz sampling frequency. Over the last decade, this technique has been applied for plant tissues, including roots, seeds, leaves, and flowers in both liquid and air. Here, we describe the operating principle of self-referencing optrodic microsensing for the study of plant tissues with a specific focus on juvenile roots.
Key wordsOxygen flux Root physiology Optrode Self-referencing
The authors thank the UF Opportunity Fund for supporting E.S. McLamore, and the following for supporting Y. Wan: National Basic Research Program of China (973 Program 2011CB809103, 2011CB944601), the CAS/SAFEA International Partnership Program for Creative Research Teams (20090491019), the National Natural Science Foundation of China (31000595, 30730009), the Knowledge Innovation Program of the Chinese Academy of Sciences (KJCX2-YW-L08, KSCX2-EW-J-1), and the China Postdoctoral Science Foundation. We also thank Dr. Miguel Angel Torres (University of North Carolina, USA.) for providing seeds of atrbohD/F double mutant.
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