WANG Hua-rong,WANG Wen-ju.Effect of Low Temperature Stress on Physiological Indices of Three Landscape Tree Species[J].Northern Horticulture,2012,36(21):54-56.
低温胁迫对三个景观树种抗寒性生理指标的影响
- Title:
- Effect of Low Temperature Stress on Physiological Indices of Three Landscape Tree Species
- 文章编号:
- 1001-0009（2012）21-0054-03
- 关键词:
- 景观植物; 抗寒性; 低温胁迫; Logistic曲线方程
- 分类号:
- S 687
- 文献标志码:
- A
- 摘要:
- 以4 a生红瑞木、合欢、悬铃木的1 a生枝条为试材，测定了不同低温冷冻处理条件下的可溶性糖、游离脯氨酸、丙二醛含量以及枝条的相对电导率。结果表明：随着温度下降，3个树种可溶性糖和脯氨酸含量均呈现先升后降的趋势，MDA含量随温度降低逐渐升高；枝条相对电导率随处理温度降低呈“S”形上升。相对电导率结合Logistic方程推算出红瑞木、合欢、悬铃木低温半致死温度(LT50)分别为-31.8、-21.5和-19.9℃。抗寒性强弱顺序为：红瑞木＞合欢＞悬铃木。
- Abstract:
- Taking one-year-old dormancy branches of four-year-old Cornus alba，Ablzizai jlibrsisin and Paltanus acerfioila as test materials,after treated by low temperature treatments，the content of soluble sugar，free proline，malondialdehyde(MDA)，and the relative conductivity of the cold resistance of these landscape tree species were studied.The resluts showed that the content of soluble sugar，free proline in membrane increased first and decreased later，but the content of MDA increased，and the relative conductivity increased as a S-curves with the temperature decreased.According to the Logistic equation，the semi-lethal temperature(LT50)for Cornus alba，Ablzizai jlibrsisin and Paltanus acerfioila one-year stick were calculated which were －31.8,－21.5 and－19.9℃ respectively.In conclusion，the order of cold resistance for three species was Cornus alba>Ablzizai jlibrsisin>Paltanus acerfioila.
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备注/Memo
第一作者简介：王华荣（1954-），男，本科，副教授，现主要从事林木病害防治等研究工作。E-mail:wwj5318@tom.com.