Acid tolerance of Pacific Northwest conifers in solution culture
Acid tolerance of Pacific Northwest conifers in solution culture
复制标题
溶液培养中太平洋西北针叶树的耐酸性
DOI：
10.1007/bf02374769
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发表时间：
1986
期刊：
影响因子：
4.9
通讯作者：
R. Zasoski
中科院分区：
文献类型：
--
作者：
P. J. Ryan;S. Gessel;R. Zasoski
本文研究了3种西北太平洋针叶树种花旗松（Pseudotsuga menziesii（Mirb.）Franco）、西部铁杉（Tsuga heterophylla（Raf.）Sarg.），和西部红杉（Thuja plicataDonn）在有铝和无铝的酸性营养液中生长。酸处理配对，以区分铝的影响，从氢离子浓度的特定水平的铝阳离子诱导通过水解反应。相对于农艺植物，所有的针叶树被发现耐酸性溶液和高水平的铝。不同的物种在其相对耐受H和铝阳离子。花旗松和西部红杉都表现出类似或更好的生长在营养含有175 ppm铝比在相同的pH值（3.0）的解决方案，没有铝。与其他物种相比，西部铁杉存活和繁荣的pH值为3的酸性溶液中，而铝在酸性溶液中的存在下，对幼苗根系生长和组织二价阳离子浓度，特别是钙和镁的不利影响。因此，西部铁杉在酸性条件下生长的能力被认为与该物种对溶液中过量H-阳离子的生理耐受性以及对Ca和Mg的低组织需求有关。这种耐受性的H-阳离子浓度发现西部铁杉意味着在溶液中的高铝浓度的具体影响可以区分在hemoock幼苗生长和营养的影响，增加H-浓度由于铝水解。
Seedlings of three Pacific northwest conifer species: Douglas-fir (Pseudotsuga menziesii(Mirb.) Franco), western hemlock (Tsuga heterophylla(Raf.) Sarg.), and western redcedar (Thuja plicataDonn) were grown in acid nutrient solutions with and without aluminium present. The acid treatments were paired so as to differentiate the effects of aluminium from the hydrogen ion concentration that a specific level of Al-cations induces via hydrolysis reactions. Relative to agronomic plants, all the conifers were found tolerant of the acid solutions and high levels of aluminium. Species differed in their relative tolerance to H and Al-cations. Douglas-fir and western redcedar both displayed similar or better growth in nutrient containing 175 ppm Al than in solutions at the same pH (3.0) without aluminium. In contrast to the other species, western hemlock survived and thrived in acid solution of pH 3 while the presence of Al in acid solution adversely affected seedling root growth and tissue divalent cation concentrations, especially calcium and magnesium. Therefore, the ability of western hemlock to grow in acid conditions is postulated to be related to this species' physiological tolerance of excess H-cations in solution and low tissue requirements of Ca and Mg. This tolerance of H-cation concentrations found for western hemlock meant that the specific effects of high Al concentrations in solution could be differentiated in hemoock seedling growth and nutrition from those effects caused by increased H-concentration due to Al-hydrolysis.