New Zealand Journal of Agricultural Research abstracts
Monitoring and analysis of electrical signals in water-stressed
plants
Cheng Wang1,2
Lan Huang1,*
Zhong-Yi Wang1
Xiao-Jun Qiao2
1College of Information and Electrical Engineering
China Agricultural University
Beijing 100083, PR China
2National Engineering Research Center for Information
Technology in Agriculture
Beijing 1 7, PR China
*Author for correspondence: biomed_hl@263.net
Abstract A multi-channel system was
developed for
simultaneous monitoring of multiple environmental factors and
electrical signals in greenhouse grown cucumber plants. Using this
system, electrical signals in response to water stress were recorded in
the laboratory and in the greenhouse. Application to the roots of a 30%
polyethylene glycol 6000 solution (–0.84 MPa water potential) caused a
significant decrease in the amplitude of an electrical signal induced
by a dark/light change. The amplitude of the mean value of the signal
in the transition from dark to light (40–50 min at dawn) was used to
reflect the status of the plant under water stress, at which time the
soil water content was reduced to 27%. The system was able to provide a
long-term stable tool to measure and analyse changes in electrical
signals in plants in response to environmental changes.
Keywords electrical signals; cucumber
plants; bioelectrode;
monitoring system; greenhouse; water stress
A07097; Online publication date 31 January 2008; Received and
accepted 10 August 2007
New Zealand Journal of Agricultural Research, 2007, Vol. 50:
823–829
0028–8233/07/5005–0823 © The Royal Society of New Zealand 2007
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