低温胁迫下7个引种核桃品种幼苗的抗寒生理生化特性研究  

Study on Cold Tolerance of Introduced Walnut Seedlings under Natural Cold Stress

作　　者：文进[1] 陈少瑜[1] 李江[1] 熊新武[1] 张群[1] 朱宏涛[2] 李俊南[1] 孟梦[1] 陈伟[1] 杨斌[1] 裴艳辉[1] 

机构地区：[1]云南省林业科学院,云南昆明650201 [2]中国科学院昆明植物研究所,云南昆明650201

出　　处：《西部林业科学》2013年第5期53-56,共4页Journal of West China Forestry Science

基　　金：国家林业局"948"项目"荷兰核桃良种及其培育技术引进"(2011-4-28)

摘　　要：2012年以7个引种的核桃品种1年生苗叶片为研究对象,以云南地方品种漾濞泡核桃为对照,通过测定分析自然低温变化胁迫下膜透性、丙二醛和脯氨酸含量及变化情况,对8个核桃品种的抗寒性进行了初步研究。结果表明,温度降低后,3个生理指标皆呈上升趋势,但不同指标上升的幅度不同,同一指标中不同品种上升的幅度也各不相同。综合分析3个生理指标变化情况,8个参试品种(含对照)的抗寒性,Buccaneer和Axel较强;Coenen,Parisienne,Hanson和漾濞泡核桃次之;Lara和Fernette较差。Taking seedlings of 7 introduced walnut cultivars and 1 local cultivar as samples, preliminary assess- ment on their cold tolerance was conducted through analyzing 3 physiological and biochemical indexes under natural cold stress. The results showed that with the decrease of natural temperature, 3 indexes namely relative electrical conductivity, MDA and proline content tended to increase. However, the increase extents were different among the cuhivars. Based on comprehensive analysis of all 3 indexes, 8 cultivars were divided into 3 groups according to their cold tolerance. The group I with 2 introduced cuhivars Buccaneer and Axel showed high cold tolerance, next came group 1I with 4 cuhivars Coenen, Parisienne, Hanson and Juglans sigillata, and group m with 2 in- troduce cuhivars Lara and Fernette showed the lowest tolerance.

关 键 词：核桃 引种 幼苗 抗寒性 低温胁迫 生理指标 

分 类 号：S664.1[农业科学—果树学]