Drought-Simulation Facility for Assessing Tolerance and Risks of Genetically Modified Crops
2014
Nam, K.H., Bio-Evaluation Center, KRIBB, Cheongju, Republic of Korea | Ko, E.M., Bio-Evaluation Center, KRIBB, Cheongju, Republic of Korea | Kim, D.Y., Bio-Evaluation Center, KRIBB, Cheongju, Republic of Korea | Pack, I.S., Bio-Evaluation Center, KRIBB, Cheongju, Republic of Korea | Park, J.H., Bio-Evaluation Center, KRIBB, Cheongju, Republic of Korea | Kim, C.G., Bio-Evaluation Center, KRIBB, Cheongju, Republic of Korea
We designed and constructed a drought-simulation facility for use in producing droughttolerant transgenic crops and assessing their associated risks. This facility consists of soil storage containers and rainout shelters. Each container is equipped with an efficient drainage system so that proper drought conditions can be maintained by controlling water flow to and from the soil. The polyvinyl roof and sidewalls close automatically during rain events to exclude rainfall from plots within the containers but re-open under dry conditions. Water is supplied via sub-surface drip irrigation. The soil water content is monitored at 30-min intervals by sensors installed at depths of 10, 20, 30, and 40 cm. For testing its performance, the field within the facility was divided into two systems, well-watered and water-deficit. Three cultivars of rice were grown. During the experiment, the soil water content was relatively lower in the water-deficit system. Regardless of cultivar, the mean values for plant height; panicle length; grain number, weight, and width; 1000-grain weight; and overall yield were significantly lower in that system when compared with those parameters in the well-watered system.
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