| A Discussion on Drought Tolerance Through Hydraulic Architecture of Woody Plants |
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| 作者姓名： | LI Jiyue LIU Xiaoyan ZHAI HongboCollege of Resources and Environment. Beiiins Forestry University Beiiins P. R. China. |
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| 作者单位： | LI Jiyue LIU Xiaoyan ZHAI HongboCollege of Resources and Environment. Beiiins Forestry University，Beiiins 100083，P. R. China. |
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| 摘 要： | In this paper, ten woody plants grew on the campus of the Beijing Forestry University were selected for measuring hydraulic architecture parameters and water potential of one-year-old twigs. The results show that day and night change of water potential and hydraulic architecture parameters appear to be obviously convex trend. The relationship models between water potential and hydraulic conductivity, special conductivity and leaf special conductivity were respectively established, which were simulated by equations Y=axb and Y=ax2 bx c, through which the parameters physiological meanings were discussed. The results show also show that embolism vulnerability of ten tree species was Robinia pseudoacacia> Gleditsia sinensis> Acer truncatum> Prunus davidiana> Cornus alba> Platycladus orientalis> Cedrus deodara> Pinus bungeana> Pinus tabulaeformis> Jasminum nudiflorum, and that the water transport efficiency in xylem and embolism vulnerability of the species are ring-porous species> diffuse-porous species>non
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A Discussion on Drought Tolerance Through Hydraulic Architecture of Woody Plants |
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| LI Jiyue LIU Xiaoyan ZHAI HongboCollege of Resources and Environment. Beiiins Forestry University,Beiiins ,P. R. China..A Discussion on Drought Tolerance Through Hydraulic Architecture of Woody Plants[J].中国林业科技(英文版),2002(4). |
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| Authors: | LI Jiyue LIU Xiaoyan ZHAI HongboCollege of Resources and Environment Beiiins Forestry University Beiiins P R China |
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| Institution: | LI Jiyue LIU Xiaoyan ZHAI HongboCollege of Resources and Environment. Beiiins Forestry University,Beiiins 100083,P. R. China. |
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| Abstract: | In this paper, ten woody plants grew on the campus of the Beijing Forestry University were selected for measuring hydraulic architecture parameters and water potential of one-year-old twigs. The results show that day and night change of water potential and hydraulic architecture parameters appear to be obviously convex trend. The relationship models between water potential and hydraulic conductivity, special conductivity and leaf special conductivity were respectively established, which were simulated by equations Y=axb and Y=ax2 bx c, through which the parameters physiological meanings were discussed. The results show also show that embolism vulnerability of ten tree species was Robinia pseudoacacia> Gleditsia sinensis> Acer truncatum> Prunus davidiana> Cornus alba> Platycladus orientalis> Cedrus deodara> Pinus bungeana> Pinus tabulaeformis> Jasminum nudiflorum, and that the water transport efficiency in xylem and embolism vulnerability of the species are ring-porous species> diffuse-porous species>none-porous species. It is clear that the effectiveness and security of water transport in woody plants are not entirely available at the same time. |
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| Keywords: | hydraulic architecture drought resistance water potential model |
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