摘要
为了明确‘金叶锦带’(Weigela florida‘Gold rush’)、‘猬实’(Kolkwitzia amabilis Geaebn)、‘欧洲雪球’(Viburnum opulus)、‘大花圆锥绣球’(Hydrangea paniculata var.grandiflora Sieb.)、‘小紫珠’(Callicarpa dichotoma(Lour)K.Koch)5种花灌木在兰州地区的越冬性与抗寒性,以一年生枝条为试材,采用梯度降温法,研究低温处理后枝条的生活力及其抗寒生理指标,并应用Logistic方程、隶属函数分析方法,对供试材料抗寒性进行了评价.结果表明:‘欧洲雪球’‘大花圆锥绣球’‘猥实’‘金叶锦带’‘小紫珠’的半致死温度(LT50)分别为-28.91、-26.08、-23.60、-22.66、-15.89℃;随着冷冻处理温度的降低,5种灌木相对电导率、丙二醛(MDA)含量、可溶性糖含量、游离脯氨酸含量持续升高,处理温度与相对电导率之间呈显著负相关.抗寒能力综合比较显示欧洲雪球抗寒性最强,小紫珠抗寒性最差;5种花灌木的抗寒性排序为:‘欧洲雪球’>‘大花圆锥绣球’>‘猬实’>‘金叶锦带’>‘小紫珠’.
In order to understand the overwintering performance and cold resistance of five kinds of flowering shrubs in winter of Lanzhou area,one-year old branches of Weigela florida＇Gold rush＇）,Kolkwitzia amabilis Geaebn,Viburnum opulus,Hydrangea paniculata Var.grandiflora Sieb.,Callicarpa dichotoma（Lour）K.Koch）were taken as materials,by using gradient cooling method to study the life force and related cold physiological characteristics of these branches.Logistic equation,membership function analysis method were applied for evaluation the cold resistance.The results showed that semi-lethal temperature（LT50）of‘Viburnum opulus＇,‘Hydrangea paniculata var.grandiflora Sieb.＇,‘Kolkwitzia amabilis Geaebn＇,Weigela florida‘Gold rush＇,‘Callicarpa dichotoma（Lour）K.Koch）＇was-28.91 ℃,-26.08 ℃,-23.60℃,-22.66℃and-15.89℃,respectively.With the freezing temperature lower,rel-ative conductivity and content of malondialdehyde（MDA）,soluble sugarand free proline of five kinds of shrubs increased.There was a significant negative correlation between the freezing temperature and relative conductivity.Comprehensive comparison of cold tolerance showed Viburnumopulusin the best performance on resistance to cold,Callicarpa dichotomathe worst.The cold resistance of five kinds of shrubs orders as：Viburnum opulusHydrangea paniculata var.grandiflora Sieb.〉 Kolkwitzia amabilis Geaebn〉Weigela florida‘Gold rush＇〉Callicarpa dichotoma（Lour）K.Koch.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2015年第5期35-41,46,共8页
Journal of Gansu Agricultural University
基金
甘肃农业大学园艺学院SRTP项目"园林灌木在兰州地区的适应性评价"(20150906)
兰州市科技局攻关项目"兰州地区优良花灌木引种与推广应用技术研究"(2013-4-127)
关键词
花灌木
低温胁迫
抗寒性评价
主要成分分析
flower shrubs
chilling stress
main component analysis
cold resistance
comprehensive evaluation
