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应用生态学报 ›› 2017, Vol. 28 ›› Issue (5): 1464-1472.doi: 10.13287/j.1001-9332.201705.039

• 目次 • 上一篇    下一篇

6种含笑属植物抗寒性分析与综合评价

李瑞雪1,2, 金晓玲1*, 胡希军1,3, 柴弋霞1, 蔡梦颖1, 罗峰1, 张方静1   

  1. 1中南林业科技大学, 长沙 410004;
    2湖南科技大学, 湖南湘潭 411201;
    3湖南省环境资源植物开发与利用工程技术研究中心, 长沙 410004
  • 收稿日期:2016-10-14 修回日期:2017-03-17 发布日期:2017-05-18
  • 通讯作者: *E-mail: jxl0716@hotmail.com
  • 作者简介:李瑞雪, 女, 1981年生, 博士研究生. 主要从事园林植物应用研究. E-mail: 498623839@qq.com
  • 基金资助:
    本文由林业公益性行业科研专项(201404710)和湖南省“十二五”重点学科(风景园林学) (湘教发[2011]76号)资助

Analysis and comprehensive evaluation on cold resistance of six varieties of Michelia

LI Rui-xue1,2, JIN Xiao-ling1*, HU Xi-jun1,3,CHAI Yi-xia1, CAI Meng-ying1, LUO Feng1, ZHANG Fang-jing1   

  1. 1Central South University of Forestry and Technology, Changsha 410014;
    2Hunan University of Science and Technology, Xiangtan 411201, Hunan, China;
    3Research Centre of Development and Utilization Technology of Environment Plant Resources in Hunan Province, Changsha 410014
  • Received:2016-10-14 Revised:2017-03-17 Published:2017-05-18
  • Contact: *E-mail: jxl0716@hotmail.com
  • Supported by:
    This work was supported by the Special Scientific Research Program in Public Industry (Forestry) (201404710), and the Key Project (Landscape Architecture) of Hunan Pro-vince during Twelfth Five-year Period Plan [Educational Commission of Hunan Province 2011(76)].

摘要: 以6种含笑属植物为试材,进行田间冻害调查,拟合Logistic方程计算其低温半致死温度,采用石蜡切片技术,测定9项叶片解剖结构指标,运用隶属函数法对各树种的抗寒性进行综合分析与评价.结果表明: 6种含笑属植物叶片的相对电导率与0~25 ℃低温处理3 h的半致死温度之间呈显著正相关.6种含笑属植物低温半致死温度在-20.48~-8.67 ℃,高低顺序为深山含笑>红花深山含笑>峨眉含笑>杂交11-8>阔瓣含笑>六瓣含笑;叶片表皮细胞1~2层,垂周壁略呈波浪状,栅栏组织细胞1~3层,9项叶片解剖结构指标差异显著,栅栏组织厚度、栅海比和主脉厚度是影响抗寒性的主要叶片解剖结构指标.电导法和隶属函数法对6种含笑属植物的抗寒性评价结果与田间调查结果基本一致.6种含笑属植物抗寒性强弱顺序为:六瓣含笑>阔瓣含笑>杂交11-8>峨眉含笑>红花深山含笑>深山含笑.

Abstract: Taking six varieties of Michelia as test materials, their responses under cold situation in the field were investigated and the semilethal low temperatures were calculated by fitting Logistic equation. The nine structure indexes of leaf tissue were observed by paraffin section, and a comprehensive evaluation on cold resistance of different varieties was given according to subordinate function value analysis. The results showed that the relative electrical conductivity of six varieties of Michelia was significantly positively correlated with the semilethal low temperature (LT50) of 3 h 0-25 ℃ treatment. From high to low, the order of LT50, which ranged between -20.48 ℃and -8.67 ℃, was M. maudiae > M. maudiae var. rubicunda > M. wilsonii > M. ‘liubanhanxiao’ ♀× M. shiluensis ♂ > M. platypetala > M. ‘liubanhanxiao’. The epidermal anticlinal walls of six varieties of Michelia leaves had 1-2 layers and showed slightly sinuated shape. The leaf had 1-3 layers of palisade tissue cells and the differences among the indexes of nine anatomical structures were extremely significant. The thickness of palisade tissue, ratio between palisade tissue and spongy tissue, and thickness of the vein were the key factors affecting cold resistance. The order of cold resistance of six varieties of Michelia, from the strong to the weak, was M. ‘liubanhanxiao’ > M. platypetala > M. ‘liubanhanxiao’ ♀× M. shiluensis ♂>M. wilsonii > M. maudiae var. rubicundaM. maudiae, which was basically consistent with the result of field investigation.