Response of five temperate deciduous tree species to water stress.
Response of five temperate deciduous tree species to water stress.
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五种温带落叶树种对水分胁迫的响应。
DOI：
10.1093/treephys/6.4.439
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发表时间：
1990
期刊：
影响因子：
4
通讯作者：
N. Bassuk
中科院分区：
文献类型：
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作者：
T. Ranney;T. Whitlow;N. Bassuk
比较了5种温带落叶树种（复叶槭L.，白桦、山海棠、刺槐、和榆（Ulmus parvifolia Jacq.）在浇水充足和缺水的条件下。有一个小的下降（平均减少0.22 MPa的物种）在水势，膨压损失（PSI（TLP））响应于水分胁迫。B的Psi（tlp）分别为-1.18、-1.34、-1.61、-1.70和-2.12 MPa。papyrifera，A. negundo、乌桕U. parvifolia，R. pseudoacacia和M. baccata，分别。PSI（TLP）的变化主要是由于组织渗透势的差异，而不是组织弹性。净光合速率下降响应水分胁迫。然而，尽管在Psi（TLP）的差异，有水分胁迫的条件下施加的植物之间的净光合作用没有差异。以. negundo和M.水分胁迫显著提高了山定子的水分利用效率（净光合/蒸腾）。不同水分胁迫植物的水分利用效率比较表明，M。baccata大于B。papyrifera或U.小叶的B间水分利用效率差异不显著。papyrifera、乌藨子U. parvifolia，A. negundo和R.刺槐在水分胁迫条件下，叶/根干重比（蒸腾吸收能力的指数）在0.77之间。刺槐为1.05，B为1.05。纸莎草
Gas exchange, tissue water relations, and leaf/root dry weight ratios were compared among young, container-grown plants of five temperate-zone, deciduous tree species (Acer negundo L., Betula papyrifera Marsh, Malus baccata Borkh, Robinia pseudoacacia L., and Ulmus parvifolia Jacq.) under well-watered and water-stressed conditions. There was a small decrease (mean reduction of 0.22 MPa across species) in the water potential at which turgor was lost (Psi(tlp)) in response to water stress. The Psi(tlp) for water-stressed plants was -1.18, -1.34, -1.61, -1.70, and -2.12 MPa for B. papyrifera, A. negundo, U. parvifolia, R. pseudoacacia, and M. baccata, respectively. Variation in Psi(tlp) resulted primarily from differences in tissue osmotic potential and not tissue elasticity. Rates of net photosynthesis declined in response to water stress. However, despite differences in Psi(tlp), there were no differences in net photosynthesis among water-stressed plants under the conditions of water stress imposed. In A. negundo and M. baccata, water use efficiency (net photosynthesis/transpiration) increased significantly in response to water stress. Comparisons among water-stressed plants showed that water use efficiency for M. baccata was greater than for B. papyrifera or U. parvifolia. There were no significant differences in water use efficiency among B. papyrifera, U. parvifolia, A. negundo, and R. pseudoacacia. Under water-stressed conditions, leaf/root dry weight ratios (an index of transpiration to absorptive capacity) ranged from 0.77 in R. pseudoacacia to 1.05 in B. papyrifera.