应用生态学报2017，Vol.28Issue(5)：1464-1472,9.DOI:10.13287/j.1001-9332.201705.039
6种含笑属植物抗寒性分析与综合评价
Analysis and comprehensive evaluation on cold resistance of six varieties of Michelia
摘要
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.rubicunda ＞ M.maudiae,which was basically consistent with the result of field investigation.关键词
抗寒性/低温半致死温度/解剖结构Key words
cold resistance/semilethal low temperature (LT50)/anatomical structure引用本文复制引用
李瑞雪,金晓玲,胡希军,柴弋霞,蔡梦颖,罗峰,张方静..6种含笑属植物抗寒性分析与综合评价[J].应用生态学报,2017,28(5):1464-1472,9.基金项目
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 This work was supported by the Special Scientific Research Program in Public Industry (Forestry) (201404710),and the Key Project (Landscape Architecture) of Hunan Province during Twelfth Five-year Period Plan [Educational Commission of Hunan Province 2011 (76)]. （201404710）
