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Citation:

Effects of Drought Stress on the Growth and Physiological Characteristics of Aegiceras corniculatum

  • Received Date: 2013-09-26
  • Taking 3-year-old Aegiceras corniculatum as test material, and 4 gradients of simulated soil drought (soil moisture 100%, 70%—80%, 40%—50% and 20%—30%,) were set to study the effect of drought stress on the growth and physiological characteristics of A. corniculatum. The results indicated that as the severity of drought increased, the number of fallen leaves increased significantly while the survival rate of A. corniculatum decreased significantly; the activity of nitrate reductase declined gradually, the contents of free proline, soluble protein, malondialdehyde and membrane permeability in leaf all showed a trend of rise with the increase of drought stress severity, whereas the chlorophyll content, SOD activity, POD activity and root activity showed a trend of rising first then declining. In conclusion, A. corniculatum is able to grow well on freshwater land with a range of soil moisture of 70%—80%, but its growth and physiological characteristics will be significantly impaired by drought stress when soil moisture is below 50%.
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Effects of Drought Stress on the Growth and Physiological Characteristics of Aegiceras corniculatum

  • 1. College of Life Science, Jiaying University, Meizhou 514015, Guangdong, China
  • 2. School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China

Abstract: Taking 3-year-old Aegiceras corniculatum as test material, and 4 gradients of simulated soil drought (soil moisture 100%, 70%—80%, 40%—50% and 20%—30%,) were set to study the effect of drought stress on the growth and physiological characteristics of A. corniculatum. The results indicated that as the severity of drought increased, the number of fallen leaves increased significantly while the survival rate of A. corniculatum decreased significantly; the activity of nitrate reductase declined gradually, the contents of free proline, soluble protein, malondialdehyde and membrane permeability in leaf all showed a trend of rise with the increase of drought stress severity, whereas the chlorophyll content, SOD activity, POD activity and root activity showed a trend of rising first then declining. In conclusion, A. corniculatum is able to grow well on freshwater land with a range of soil moisture of 70%—80%, but its growth and physiological characteristics will be significantly impaired by drought stress when soil moisture is below 50%.

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