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、MDA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℃）。
Abstract
Dormant branches of four oak trees (Quercus nuttallii,Quercus palustris,Quercus shumardii,Quercus bi-color)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-le-thal temperature(LT50)and cold resistance rankings of four kinds of oak trees were obtained by parameters analyzing:palustris,Quercus (-28. 42℃)>Quercus nuttallii (-25. 1 1 ℃)>Quercus bicolor (-24. 78 ℃)>Quercus shu-mardii (-22. 42℃).
基金项目
山东省良种工程重大项目(鲁科农学2010117号)
国外观赏栎类引种繁殖与栽培技术研究(2015GGH310002)
NETL
NSTL
维普
万方数据