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Poster Presentations
Day 3, June 24（Tue.）
Room P (Maesato East, Foyer, Ocean Wing)
- 3P-AM-52（2A-O3-1640）
Exploring the Chemical Communication of Australian Native Flower Corymbia ficifolia Using Mass Spectrometry Imaging
(1ESC, GU, 2CMM, UQ, 3QBI, UQ)
oRachel Jackson1, Brett Hamilton2, Robert Sullivan3, Darren Holland1, Joshua Hayton1, Anthony Carroll1
The Myrtaceae family is a rich source of natural products (NPs), with NPs isolated exhibiting diverse bioactivity. Flowers are arguably the most influential part of a plant, ensuring the success of the next generation and therefore hosting some of the most intricate chemical interactions. They have evolved complex chemical mechanisms to survive and interact with their environment. Yet these relationships, remain poorly understood with literature mainly focusing on leaf chemistry, and commercially relevant species.
The combination of mass spectrometry and spectroscopy techniques are essential for the discovery of new NPs but provide limited insight into how these molecules are localised within specific plant tissues, necessary for understanding their ecological function. Mass Spectrometry Imaging (MSI) allows the visualisation of NPs and is becoming increasingly valuable in plant biochemistry.
This study investigates Corymbia ficifolia flowers as a target of new bioactive NPs, using various analytical techniques specifically MALDI-MSI, with an emphasis on sample preparation and method development. MS images revealed that NPs were compartmentalised in specific regions corresponding to ecological activity, such as pollen and nectar production, reproduction, biosynthesis, and defence. The localisation of some new and known bioactive NPs were explored in C. ficifolia and related species.