“星白”勋章菊耐寒性研究  

Study on Cold Hardiness of Gazania rigens L.'White Star'

作　　者：王永亮[1] 王韡[1] 戴斌[1] 陆小平[1] 

机构地区：[1]苏州大学金螳螂建筑与城市环境学院,江苏苏州215123

出　　处：《北方园艺》2012年第2期73-75,共3页Northern Horticulture

基　　金：苏州市科技支撑(农业)资助项目(SNG0908)

摘　　要：通过对日本引进的"星白"勋章菊进行不同温度(5、3、1、-1、-3、-5、-7℃)处理,测定了低温胁迫后叶片生理生化指标的变化。结果表明:"星白"勋章菊具较强的抗寒能力,是一种适宜在城市园林广为推广应用的优秀园林植物。随着温度的降低,"星白"勋章菊叶片叶肉细胞的电解渗透率在-1℃以上处理时变化不大,-3℃时略微上升,在-3～-5℃范围内陡然上升。以电解质渗透率为参数,用Logistic方程求得拐点值,确定了勋章菊的低温半致死温度(LT50)为-4.37℃;丙二醛(MDA)含量先降低后上升;叶绿素含量变化不大;脯氨酸含量呈先降低后上升再下降的趋势,在-1℃时含量达到最大值。The physio-bioehemical index of the leaves of Oazania rigens L. from Japan ＇White Star＇ were tested under different low temperature（5,3,1, - 1, - 3, - 5, - 7℃）. The results showed that ＇ White Star＇ with a strong cold hardiness, which was a widely suitable for application of the best in the city. With the temperature decreasing, ＇White Star＇ chrysanthemum mesophyll cells above the electrolytic permeability -1℃ treatment changed little, at -3℃ increased slightly, but from-3℃ to -5℃, the permeability of ceil had a sharply rising. Using Logistic equation determine LT50 was -4. 37℃. The quantity of Malondialdehyde（MDA） descended at first and then increased; The quantity of chlorophyll changed little; The quantity of proline decreased first, then decline, at last increased, when at -1℃ ,the content reached the maximum. The quantity of proline showed drop-rise-drop trend.

关 键 词：“星白”勋章菊 耐寒性 低温胁迫 生理指标 园林植物 

分 类 号：S682.11[农业科学—观赏园艺]