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Effects of a low-voltage electric pulse charged to culture soil on plant growth and variations of the bacterial community

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DOI: 10.4236/as.2012.33038    6,116 Downloads   11,132 Views   Citations

ABSTRACT

This study was conducted to verify the effect of an electric pulse on growth of crops (lettuce and hot pepper) that were cultivated in lab-scale soil. The electric pulse generated from direct-circuited 2, 4, 6, 8, and 10 V of electricity by periodic exchange of the anode and cathode was charged to a culture soil that is an electrically pulsed culture soil (EPCS) but not charged to a conventional culture soil (CCS). Growth of lettuce increased and growth duration of hot pepper plants was more prolonged at 4, 6, 8, and 10 V of EPCS than at 2 V of EPCS and CCS. The fruiting duration and yield of hot pepper fruits were proportional to the growth duration of the hot pepper plants. Temperature gradient gel electrophoresis (TGGE) patterns of 16S-rDNA obtained from the bacterial community inhabiting the CCS and EPCS were identical at the initial time and did not change significantly at days 28 and 56 of cultivation. The bacterial communities inhabiting the surface of lettuce roots were not influenced by the electric pulse but were significantly different from those inhabiting the culture soil based on the TGGE patterns. Growth of lettuce and hot pepper plants that were cultivated in 4 - 10 V of EPCS may increase; however, the bacterial community inhabiting the soil and the surface of plant roots may not be influenced by an electric pulse.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Yi, J. , Choi, J. , Jeon, B. , Jung, I. and Park, D. (2012) Effects of a low-voltage electric pulse charged to culture soil on plant growth and variations of the bacterial community. Agricultural Sciences, 3, 339-346. doi: 10.4236/as.2012.33038.

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