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7种冬青树种耐低温能力比较(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2006年01期
Page:
33-36
Column:
研究论文
publishdate:
2006-01-20

Article Info:/Info

Title:
The Comparison of Low Temperature Tolerance Ability of Seven Species of Ilex Trees
Article ID:
1000-2006(2006)01-0033-04
Author(s):
MAO Zhi-bin12 XIE Xiao-jin3 TANG Geng-guo1*
1. College of Landscape Architecture Nanjing Forestry University, Nanjing 210037, China; 2. Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; 3. College Horticulture Nanjing Agriculture University, Nanjing 210095, China
Keywords:
Ilex Low temperature tolerance ability Electrolyte leakage rate Unsaturated fatty acids
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2006.01.008
Document Code:
A
Abstract:
Electric eonductivities of excised-leaves of 7 species of Ilex trees distributed in China were measured and lethal temperature 50 (LT50) were calculated under the simulated freezing treatment. The results indicated that the low temperature tolerance ability of 7 species of Ilex trees had a significant difference, and the freezing resistance from strong to weak was Ilex latifolia, I. comuta, I. chinensis, I. rotunda, I. zhejiangensis, I. hylonoma, I. integra. Four trees selected from 7 species of Ilex trees that treated by 4℃ and -16℃ were chosen to measure the contents of unsaturated fatty acids. The results revealed the content of unsaturated fatty acids and IUFA increased as the temperature decreased, and the increasing extent of IUFA was were different respectively so they could be used as supplementary validation of the low temperature tolerance ability of different Ilex trees. The research resuits also provide important indexes for introducing Ilex trees to higher latitude region.

References

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Last Update: 2013-05-20