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2010•Journal of Hebei Normal University of Science & TechnologyRequires access

Effects of Extraneous Source SOD on Drought Resistance in Bonsai Lettuce

MA Qing-wu

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Abstract

In order to study the effect of drought and extraneous superoxide dismutase(SOD),an experiment was conducted with Bonsai Lettuce as materials.The results showed that the SOD and peroxide dismutase(POD) first increased then decreased under drought stress,and extraneous source SOD could increase SOD activities and decrease POD activities.The content of malondialdehyde(MDA) and proline(Pro) increased,and the extraneous SOD alleviated the rising trend of MDA and Pro under the serious drought condition.Drought condition increased the chlorophyll a/b ratio,and the extraneous SOD made it decrease and come near to the control level.The drought condition made water potential decrease early,while the extraneous SOD delayed this decline.This showed that the extraneous SOD alleviated the drought stress,made physiological index improve,and could increase drought resistance.

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What this paper is about

In order to study the effect of drought and extraneous superoxide dismutase(SOD),an experiment was conducted with Bonsai Lettuce as materials.The results showed that the SOD and peroxide dismutase(POD) first increased then decreased under drought stress,and extraneous source SOD could increase SOD activities and decrease POD activities.The content of malondialdehyde(MDA) and proline(Pro) increased,and the extraneous SOD alleviated the rising trend of MDA and Pro under the serious drought condition.Drought condition increased the chlorophyll a/b ratio,and the extraneous SOD made it decrease and come near to the control level.The drought condition made water potential decrease early,while the extraneous SOD delayed this decline.This showed that the extraneous SOD alleviated the drought stress,made physiological index improve,and could increase drought resistance.

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Available abstract

In order to study the effect of drought and extraneous superoxide dismutase(SOD),an experiment was conducted with Bonsai Lettuce as materials.The results showed that the SOD and peroxide dismutase(POD) first increased then decreased under drought stress,and extraneous source SOD could increase SOD activities and decrease POD activities.The content of malondialdehyde(MDA) and proline(Pro) increased,and the extraneous SOD alleviated the rising trend of MDA and Pro under the serious drought condition.Drought condition increased the chlorophyll a/b ratio,and the extraneous SOD made it decrease and come near to the control level.The drought condition made water potential decrease early,while the extraneous SOD delayed this decline.This showed that the extraneous SOD alleviated the drought stress,made physiological index improve,and could increase drought resistance.

Key concepts: Point of delivery, Superoxide dismutase, Malondialdehyde, Proline, Drought resistance, Drought stress, Horticulture, Chlorophyll

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