摘要
以娜塔栎、沼生栎、舒玛栎、双色栎4种栎树的休眠枝为试材,分别在0、-5、-10、-15、-20、-25、-30、-35℃下低温胁迫处理后,测定其枝皮的电导率、过氧化物酶(POD)、超氧物歧化酶(SOD)、可溶性蛋白、M DA含量,探讨其生理生化指标的变化及抗寒性。结果表明,随温度的降低,4栎树植物的电导率曲线呈现典型的S型,而生理指标均呈升高后降低的趋势。通过拟合Logistic方程得出4种植物的半致死温度(LT50)并确定了4种栎树的抗寒性强弱:沼生栎(-28.42℃)>娜塔栎(-25.11℃)>双色栎(-24.78℃)>舒玛栎(-22.42℃)。
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 lowtemperature 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 ℃).
出处
《山东大学学报(理学版)》
CAS
CSCD
北大核心
2016年第5期43-47,60,共6页
Journal of Shandong University(Natural Science)
基金
山东省良种工程重大项目"林木用材林良种选育"(鲁科农学(2010)117号)
国外观赏栎类引种繁殖与栽培技术研究(2015GGH310002)
关键词
栎类植物
低温胁迫
半致死温度
抗寒性
oak trees
cold stress
semi-lethal temperature
cold resistance