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CSIRO Waite Campus Seminar: Dr Vinay Pagay
Oct 9, 4:00 pm
The following seminar will take place at 4:00 pm on Tuesday 9th October in the CSIRO Building 1 Seminar Room, Waite Rd, Urrbrae.
Multiscale studies of plant hydraulics
Dr Vinay Pagay | The University of Adelaide, Waite Research Institute
In this seminar, I will present the results from two studies of water transport in grapevines and, as such, plants in general at multiple scales. In the first study, I will report on the differences in hydraulic behavior between two grapevine cultivars – Shiraz and Grenache – that are subjected to water stress and recovery therefrom. Our results suggest that cultivar differences in stomatal sensitivity to soil moisture availability may be related to the selective use of hydraulic and chemical signaling pathways that regulate micro- and nano-scale water transport in both leaves and roots. In the second study, I will present the results of a model that describes lateral xylem water transport through bordered pit membrane pores based on electroviscous flow. I show that, while conventional fluid dynamics theory adequately describes hydrodynamics at the whole-plant level including axially within xylem vessels, the theory breaks down when describing transport through nanoscopic pores of bordered pit membranes. In this seminar, I will shed light on the basis of these differences that motivate our current and future research on plant water transport.
About the Speaker
Vinay Pagay is a Lecturer in Viticulture at The University of Adelaide, Waite Research Institute, where he teaches viticulture and conducts research on grapevines. Vinay received his doctorate at Cornell University (USA) in 2014 where he worked on the development of novel tools for plant water sensing. Vinay also holds a degree in computer engineering from McGill University (Canada). His basic and applied research lie at the intersection of grapevine ecophysiology and vineyard technology. His current applied research is looking into the use of proximal and remote sensing tools to obtain high spatial and temporal resolution data of both biotic and abiotic stresses in vineyards, as well as for precision irrigation scheduling. His basic research is focusing on elucidating the mechanisms involved in improved grapevine water use efficiency under reduced irrigation, specifically the roles that chemical and hydraulic signals play, as well as the role of aquaporins in regulating root and leaf water transport.
He is currently developing a sensing/decision/application tool for nitrogen management in Australian grains farms. His research involves crop and soil sensing technologies (e.g. soil electrical conductivity, and crop reflectance analysis) and the use of artificial intelligence to enable variable rate nitrogen application. His overall objective is to help farmers be more sustainable whilst meeting the world’s food production and environmental goals.
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