【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。更多还原

【Abstract】 Taking seedlings of 7 introduced walnut cultivars and 1 local cultivar as samples,preliminary assessment 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 cultivars. 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 cultivars Buccaneer and Axel showed high cold tolerance,next came group Ⅱ with 4 cultivars Coenen,Parisienne,Hanson and Juglans sigillata,and group Ⅲ with 2 introduce cultivars Lara and Fernette showed the lowest tolerance.更多还原