JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2016, Vol. 51 ›› Issue (5): 43-47.doi: 10.6040/j.issn.1671-9352.0.2015.573

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A preliminary study on cold resistance of four introduced oaks seedlings

YANG Zhen-ya, TAI Xiu-guo, CAO Zhen-yu, LI Bo, CAO Bang-hua*, WANG Shu-mei, WANG Xuan   

  1. Key Laboratory of Silviculture Ecology and Environment, Shandong Agricultural University, Taian 271000, Shandong, China
  • Received:2015-11-27 Online:2016-05-20 Published:2016-05-16

Abstract: Dormant branches of four oak trees(Quercus nuttallii, Quercus palustris, Quercus shumardii, Quercus bicolor)were used as materials to measure the changes of physiological and biochemical indexes(the electrolyte leakage,POD, SOD, soluble protein, MDA content)under different low temperature condition(0 ℃、-5 ℃、-10 ℃、-15 ℃、-20 ℃、-25 ℃、-30 ℃、-35 ℃ in this paper.Logistic equation was applied to fitting change rules of the electrolyte leakage, the results showed that the fitting effect is remarkable and correlation coefficient all are above 0.90. Semi-lethal temperature(LT50)and cold resistance rankings of four kinds of oak trees were obtained by parameters analyzing:palustris, Quercus (-28.42 ℃)>Quercus nuttallii(-25.11 ℃)>Quercus bicolor (-24.78 ℃)>Quercus shumardii (-22.42 ℃).

Key words: oak trees, cold resistance, cold stress, semi-lethal temperature

CLC Number: 

  • S792
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