Sporesat: a nanosatellite platform lab-on-a-chip system for investigating gravity threshold of fern-spore single-cell calcium ion currents

Wan Salim, Wan Wardatul Amani and Park, Joon and Rickus, Jenna and Radamacher, Abraham and Ricco, Antonio (2014) Sporesat: a nanosatellite platform lab-on-a-chip system for investigating gravity threshold of fern-spore single-cell calcium ion currents. In: Workshop on Solid-State Sensors, Actuators, and Microsystems, 8-12 June 2014, South Carolina USA.

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Abstract

SporeSat – a lab-on-a-chip (LOC) centrifuge platform designed for integration as the payload of a small (5.5 kg), free-flying satellite – has been developed to determine the gravitational thresholds for calcium-ion channel activation of a single-cell spore from the fern Ceratopteris richardii. This fern is an important model system for gravity-directed plant-cell development during variable-gravity conditions attainable only in space flight. Calcium-ion channel activity is measured by photolithographically defined calcium ion–selective electrodes (ISEs) at opposite ends of each spore. Artificial gravity is created by rotating a disk-like platform that contains the spores in wells along with the calcium ISEs. Ground experiments reveal a maximum calcium concentration ratio at 2.2xg, between micro-ion-selective electrodes near the “top” and “bottom” ends of the spore, indicating an increasing calcium concentration at one “end” of the fern spore with respect to the other. Confocal micrographs of rhizoid formation confirm the light-induced germination. SporeSat is a spaceflight experiment that will take ~ 4 days; data will be telemetered to Earth over ~ 100 days.

Item Type:	Conference or Workshop Item (UNSPECIFIED)
Additional Information:	7116/39094
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) > TA164 Bioengineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering
Depositing User:	Dr Wan Wardatul Amani Wan Salim
Date Deposited:	13 Nov 2014 11:04
Last Modified:	12 Jun 2018 15:00
URI:	http://irep.iium.edu.my/id/eprint/39094

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