16个地被菊品种的苗期抗寒性评价  

Evaluation of Seedling Cold Resistance of 16 Ground-cover Chrysanthemum Varieties

作　　者：韦淋馨 何立飞 张钰晗 李庆卫[1] WEI Linxin;HE Lifei;ZHANG Yuhan;LI Qingwei(College of Landscape Architecture,Beijing Forestry University,Beijing 100083,China;Beijing Huamu Company Limited,Beijing 101309,China)

机构地区：[1]北京林业大学园林学院,北京100083 [2]北京市花木有限公司,北京101309

出　　处：《天津农业科学》2023年第1期73-78,共6页Tianjin Agricultural Sciences

摘　　要：为研究地被菊抗寒性,加强地被菊在三北地区的应用推广,为抗寒地被菊品种筛选提供依据,以16个地被菊良种苗期叶片为材料,对其进行低温胁迫后测定叶片相对电导率、超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量,使用Logistic方程进行拟合,计算各地被菊品种半致死温度,并对地被菊的抗寒指标进行综合评价,得到16个品种的抗寒性排序。结果表明:大部分品种的SOD活性随着胁迫程度的加重而降低,但是抗寒性强的品种在胁迫后期SOD活性下降趋势要明显低于抗寒性差的品种;MDA含量与地被菊抗寒性呈负相关。采用隶属函数法对地被菊的抗寒指标进行综合评价,计算得‘毛香玉’半致死温度为最低;参试苗期地被菊苗期抗寒性排序为:‘毛香玉’>‘重阳红’>‘成双’>‘中秋红’>‘金乳荷’>‘新玉’>‘金银菊’>‘橙黄金’>‘1903’>‘醉绣球’>‘紫堇早’>‘美矮粉’>‘1902’>‘繁白露’>‘洒金红’>‘中秋白’。综上所述,‘毛香玉’苗期半致死温度为最低,为-10.66℃,抗寒性最好。In order to explore the cold resistance of ground-cover chrysanthemum,promoting the application of ground-cover chrysanthemum in the three north region,and provide a basis for the selection of cold resistant ground-cover chrysanthemum varieties,the relative conductivity,superoxide dismutase(SOD)activity and malondialdehyde(MDA)content of leaves of 16 ground-cover chrysanthemum varieties were measured after low temperature stress.Fitted with Logistic equation,and the half-lethal temperature of each ground-cover chrysanthemum variety was calculated.the cold resistance indexes of ground-cover chrysanthemum were comprehensively evaluated to obtain the cold resistance ranking of the 16 species.The results showed that the SOD activity of most of the varieties was decreased with the increase of stress,but the trend of the SOD activity of the varieties with strong cold resistance was decreased significantly slower in the late stage of stress than the varieties with poor cold resistance;the MDA content was negatively correlated with the cold resistance of ground-cover chrysanthemum.The cold resistance indexes of ground-cover chrysanthemums were evaluated by the subordinate function method,and the half-lethal temperature of'Mao Xiangyu'was calculated to be the lowest;the cold resistance of ground-cover chrysanthemums at the seedling stage was ranked as follows:'Mao Xiangyu'>'Chongyang Red'>'Cheng Shuang'>'Mid-Autumn Red'>'Golden Milk Lotus'>'New Jade'>'Golden Silver Chrysanthemum'>'Orange Gold'>'1903'>'Drunken Hydrangea'>'Purple Corydalis Early'>'Beauty Dwarf Pink'>'1902'>'Prosperous White Dew'>'Sprinkling Red'>'Mid-Autumn White'In summary,'Mao Xiangyu'has the lowest seedling semi-lethal temperature of-10.66°C and is the most resistant to cold.

关 键 词：地被菊 幼苗 抗寒性评价 

分 类 号：S682.11[农业科学—观赏园艺]