Interrelationships between leaf heat conductivity and tissue structures of different varieties of Populus tomentosa Carr. |
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Authors: | Min Wang Wen-jie Zhang Jian Xiao Zhi-yi Zhang Jing Liu |
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Institution: | (1) College of Science, Beijing Forestry University, Beijing, 100083, P. R. China;(2) Technical Institute of Physics and Chemistry, Chinese Academic of Sciences, Beijing, 100080, P. R. China;(3) Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, Beijing Forestry University, Beijing, 100083, P. R. China |
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Abstract: | Plant heat conductivity largely depends on tissue structure. Different structures lead to different heat conductivity. As
well, water transfer also plays a very important role in heat transfer in plants. We have studied leaf heat conductivity and
tissue structure of 3-and 30-year-old Populus tomentosa Carr. trees using infrared thermal imaging, steady state heat conductivity surveys and paraffin section and investigated
the relationship between leaf heat conductivity, tissue structure and water content of leaves. The results show that the temperature
on leaf surfaces among the various varieties of trees was almost the same. Leaf heat conductivity, temperature and water content
of leaves are positively correlated. The thicker the leaf tissue structures, the larger the heat resistance. That is, the
tighter the cells and the smaller the interspaces, the smaller the heat conductivity, which is not conducive for heat transfer. |
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Keywords: | Populus tomentosa Carr leaf infrared thermal imaging heat conductivity paraffin section |
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