关键词：
星白勋章菊;耐寒性;低温胁迫;生理指标;园林植物
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。
译 名：
Study on Cold Hardiness of Gazania rigens L.'White Star'
作 者：
WANG Yong-liang,WANG Wei,DAI Bin,LU Xiao-ping(Gold Mantis School of Architecture and Urban Environment,Soochow University,Suzhou,Jiangsu 215123)
关键词：
'White Star' Gazania rigens L.;cold hardiness;low-temperature stress;physiological indexe;garden plants
摘 要：
The physio-biochemical index of the leaves of Gazania 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 cell 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.
