Hormesis effects in pinto beans from ������Co gamma radiation
Exposure to moderately high levels of ionizing radiation (<20 Gy) has in some instances shown a hormetic effect in numerous vegetable-type crops. Past experiments performed in outdoor cultivars have shown a somewhat unpredictable increase in growth rate with a higher overall yield in a specified...
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ndltd-ORGSU-oai-ir.library.oregonstate.edu-1957-334592012-09-11T03:21:04ZHormesis effects in pinto beans from ������Co gamma radiationBoone, Darren M.Pinto bean -- Effect of radiation onHormesisExposure to moderately high levels of ionizing radiation (<20 Gy) has in some instances shown a hormetic effect in numerous vegetable-type crops. Past experiments performed in outdoor cultivars have shown a somewhat unpredictable increase in growth rate with a higher overall yield in a specified time when the seeds are exposed to ionizing radiation prior to germination. This experiment has attempted to eliminate potentially confounding variables in the growth of a legume utilizing an Environmental Protection Agency controlled green house. The experiment was a completely randomized block design with six blocks and seven treatment groups. Each treatment group of pinto beans (Phaseolus vulgaris L.) were exposed to ������Co radiation, given doses of 5-20 Gy, planted and grown for 40 days. Due to the symbiotic relationship with rhizobium bacteria within a seed, the expected result was a lowered nitrogen fixation capacity as bacteria concentration was reduced due to sterilization by the high energy gamma, yielding a smaller plant mass. The predicted trend in reduction would be described by the linear no-threshold model. A statistically significant increase in overall plant mass occurred in the 5 Gy treatment group, with a subsequent linear trend in mass reduction at treatment levels of 7.5, 10, 12.5 and 15 Gy. The overall quality and plant mass decreased markedly at a treatment level of 20 Gy. Additional possible contributions to plant differences in growth within a green house were light intensity, temperature, CO��� level and soil water retention. The complete randomized block design attempts to remove these as potentially confounding variables.Graduation date: 1999Higginbotham, Jack F.2012-09-10T21:54:18Z2012-09-10T21:54:18Z1998-10-291998-10-29Thesis/Dissertationhttp://hdl.handle.net/1957/33459en_US |
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en_US |
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Pinto bean -- Effect of radiation on Hormesis |
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Pinto bean -- Effect of radiation on Hormesis Boone, Darren M. Hormesis effects in pinto beans from ������Co gamma radiation |
description |
Exposure to moderately high levels of ionizing radiation (<20 Gy) has in some
instances shown a hormetic effect in numerous vegetable-type crops. Past experiments
performed in outdoor cultivars have shown a somewhat unpredictable increase in growth
rate with a higher overall yield in a specified time when the seeds are exposed to ionizing
radiation prior to germination.
This experiment has attempted to eliminate potentially confounding variables in the growth of a legume utilizing an Environmental Protection Agency controlled green house. The experiment was a completely randomized block design with six blocks and seven treatment groups. Each treatment group of pinto beans (Phaseolus vulgaris L.) were exposed to ������Co radiation, given doses of 5-20 Gy, planted and grown for 40 days.
Due to the symbiotic relationship with rhizobium bacteria within a seed, the expected result was a lowered nitrogen fixation capacity as bacteria concentration was reduced due to sterilization by the high energy gamma, yielding a smaller plant mass. The predicted trend in reduction would be described by the linear no-threshold model.
A statistically significant increase in overall plant mass occurred in the 5 Gy treatment group, with a subsequent linear trend in mass reduction at treatment levels of 7.5, 10, 12.5 and 15 Gy. The overall quality and plant mass decreased markedly at a treatment level of 20 Gy. Additional possible contributions to plant differences in growth within a green house were light intensity, temperature, CO��� level and soil water retention. The complete randomized block design attempts to remove these as potentially confounding variables. === Graduation date: 1999 |
author2 |
Higginbotham, Jack F. |
author_facet |
Higginbotham, Jack F. Boone, Darren M. |
author |
Boone, Darren M. |
author_sort |
Boone, Darren M. |
title |
Hormesis effects in pinto beans from ������Co gamma radiation |
title_short |
Hormesis effects in pinto beans from ������Co gamma radiation |
title_full |
Hormesis effects in pinto beans from ������Co gamma radiation |
title_fullStr |
Hormesis effects in pinto beans from ������Co gamma radiation |
title_full_unstemmed |
Hormesis effects in pinto beans from ������Co gamma radiation |
title_sort |
hormesis effects in pinto beans from ������co gamma radiation |
publishDate |
2012 |
url |
http://hdl.handle.net/1957/33459 |
work_keys_str_mv |
AT boonedarrenm hormesiseffectsinpintobeansfromcogammaradiation |
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1716392920143101952 |