Chin J Plant Ecol ›› 2016, Vol. 40 ›› Issue (3): 255-263.DOI: 10.17521/cjpe.2015.0260
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Rong LI1, Wei DANG1, Jing CAI1,3, Shuo-Xin ZHANG1,3, Zai-Min JIANG2,*()
Received:
2015-07-08
Revised:
2016-01-17
Online:
2016-03-10
Published:
2016-03-25
Contact:
Zai-Min JIANG
Rong LI, Wei DANG, Jing CAI, Shuo-Xin ZHANG, Zai-Min JIANG. Relationships between xylem structure and embolism vulnerability in six species of drought tolerance trees[J]. Chin J Plant Ecol, 2016, 40(3): 255-263.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2015.0260
因子 Parameter | 耐旱树种 Drought tolerance trees | |||||
---|---|---|---|---|---|---|
沙棘 Hippophae rhamnoides | 刺槐 Robinia pseudoacacia | 榆树 Ulmus pumila | 元宝枫 Acer truncatum | 旱柳 Salix matsudana | 榛 Corylus heterophylla | |
P50 (MPa) | -1.31 ± 0.183Ab | -0.22 ± 0.026Ac | -0.55 ± 0.064Ac | -2.64 ± 0.214Ba | -1.55 ± 0.103Bb | -2.84 ± 0.054Ba |
导管直径 Vessel diameter (μm) | 23.57 ± 0.579Ac | 56.96 ± 1.913Aa | 49.48 ± 1.206Aa | 31.26 ± 0.405Bb | 32.11 ± 0.415Bb | 26.81 ± 0.319Bc |
导管内径跨度 Conduit wall span (μm) | 40.10 ± 1.651Aa | 62.20 ± 0.905Ab | 58.07 ± 2.414Aa | 34.29 ± 0.729Bb | 36.19 ± 0.583Bc | 27.04 ± 0.749Bb |
导管密度 Number of vessels per unit area | 216.52 ± 0.006Ab | 32.22 ± 2.588Aa | 53.64 ± 0.011Aa | 143.55 ± 3.874Bb | 284.37 ± 0.015Bb | 270.11 ± 0.013Bb |
导管连接度 Contact fraction | 0.03 ± 0.006Aa | 0.02 ± 0.002Aa | 0.04 ± 0.004Aa | 0.13 ± 0.008Bb | 0.07 ± 0.007Bb | 0.10 ± 0.008Bb |
导管长度 Vessel length (cm) | 13.35 ± 0.827Ab | 20.55 ± 1.913Aa | 17.23 ± 0.834Aa | 3.08 ± 0.253Bc | 4.10 ± 0.397Bc | 3.23 ± 0.223Bc |
木质部密度 Wood density (g·cm-3) | 1.54 ± 0.086Aa | 1.17 ± 0.129Aa | 1.17 ± 0.062Aa | 1.42 ± 0.167Ba | 1.46 ± 0.209Ba | 0.83 ± 0.039Bb |
Table 1 The value of tension at 50% loss of conductivity (P50) and characteristic values of xylem structure of the six species (mean ± SE)
因子 Parameter | 耐旱树种 Drought tolerance trees | |||||
---|---|---|---|---|---|---|
沙棘 Hippophae rhamnoides | 刺槐 Robinia pseudoacacia | 榆树 Ulmus pumila | 元宝枫 Acer truncatum | 旱柳 Salix matsudana | 榛 Corylus heterophylla | |
P50 (MPa) | -1.31 ± 0.183Ab | -0.22 ± 0.026Ac | -0.55 ± 0.064Ac | -2.64 ± 0.214Ba | -1.55 ± 0.103Bb | -2.84 ± 0.054Ba |
导管直径 Vessel diameter (μm) | 23.57 ± 0.579Ac | 56.96 ± 1.913Aa | 49.48 ± 1.206Aa | 31.26 ± 0.405Bb | 32.11 ± 0.415Bb | 26.81 ± 0.319Bc |
导管内径跨度 Conduit wall span (μm) | 40.10 ± 1.651Aa | 62.20 ± 0.905Ab | 58.07 ± 2.414Aa | 34.29 ± 0.729Bb | 36.19 ± 0.583Bc | 27.04 ± 0.749Bb |
导管密度 Number of vessels per unit area | 216.52 ± 0.006Ab | 32.22 ± 2.588Aa | 53.64 ± 0.011Aa | 143.55 ± 3.874Bb | 284.37 ± 0.015Bb | 270.11 ± 0.013Bb |
导管连接度 Contact fraction | 0.03 ± 0.006Aa | 0.02 ± 0.002Aa | 0.04 ± 0.004Aa | 0.13 ± 0.008Bb | 0.07 ± 0.007Bb | 0.10 ± 0.008Bb |
导管长度 Vessel length (cm) | 13.35 ± 0.827Ab | 20.55 ± 1.913Aa | 17.23 ± 0.834Aa | 3.08 ± 0.253Bc | 4.10 ± 0.397Bc | 3.23 ± 0.223Bc |
木质部密度 Wood density (g·cm-3) | 1.54 ± 0.086Aa | 1.17 ± 0.129Aa | 1.17 ± 0.062Aa | 1.42 ± 0.167Ba | 1.46 ± 0.209Ba | 0.83 ± 0.039Bb |
因子 Parameters | 系数 Coefficient | t |
---|---|---|
木质部密度 Wood density (g·cm-3) | 0.326 | 0.702 |
导管直径 Vessel diameter (μm) | 0.037 | 0.532 |
导管内径跨度 Conduit wall span (μm) | -0.071 | 0.306 |
导管密度 Number of vessels per unit area | -0.007 | 0.265 |
导管连接度 Contact fraction | -19.762 | 0.188 |
导管长度 Vessel length (cm) | -0.281 | 0.010 |
Table 2 The significance in characteristic values of xylem structure to value of tension at 50% loss of conductivity (P50)
因子 Parameters | 系数 Coefficient | t |
---|---|---|
木质部密度 Wood density (g·cm-3) | 0.326 | 0.702 |
导管直径 Vessel diameter (μm) | 0.037 | 0.532 |
导管内径跨度 Conduit wall span (μm) | -0.071 | 0.306 |
导管密度 Number of vessels per unit area | -0.007 | 0.265 |
导管连接度 Contact fraction | -19.762 | 0.188 |
导管长度 Vessel length (cm) | -0.281 | 0.010 |
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