Barrett Melissa S, Preiss Katharine A, Sinclair Russell
Ecophysiological Ecology, Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, U.K.
Tree Physiol. 2005 Oct;25(10):1339-46. doi: 10.1093/treephys/25.10.1339.
We investigated the effects of waterlogging and salinity on the water relations of Eucalyptus gracilis F. Muell. growing within the Stockyard Plain Disposal Basin Reserve, 15 km southwest of Waikerie, South Australia. Presence and depth of the saline groundwater had relatively little effect on the water relations of the trees even when large differences in tree health were visible. Predawn water potential, stomatal conductance, and foliar sodium and potassium concentrations were similar for all individuals independent of the depth and salinity of the groundwater. As expected, the severity of water stress increased over summer when predawn water potentials became progressively more negative and foliar salt concentrations increased. These changes occurred in all plants independent of depth or salinity of the groundwater.
我们研究了涝渍和盐分对细叶桉（Eucalyptus gracilis F. Muell.）水分关系的影响，该树种生长在南澳大利亚韦克里西南15公里处的贮木场平原处置盆地保护区内。即使在树木健康状况存在明显差异时，咸水地下水的存在和深度对树木的水分关系影响相对较小。黎明前水势、气孔导度以及叶片钠和钾浓度在所有个体中相似，与地下水的深度和盐度无关。正如预期的那样，在夏季，随着黎明前水势逐渐变得更负且叶片盐分浓度增加，水分胁迫的严重程度加剧。所有植物都出现了这些变化，与地下水的深度或盐度无关。
