Comparison of growth characteristics and tolerance to serpentine soil of three ectomycorrhizal spruce seedlings in northern Japan
Comparison of growth characteristics and tolerance to serpentine soil of three ectomycorrhizal spruce seedlings in northern Japan
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DOI：
10.1007/s00468-006-0057-3
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发表时间：
2006-06-01
影响因子：
2.3
通讯作者：
Koike, Takayoshi
中科院分区：
文献类型：
--
作者：
Kayama, Masazumi;Choi, Dongsu;Koike, Takayoshi
油松云杉广泛分布于日本北部的蛇纹土上。蛇纹土的特点是重金属(镍、铬)和过量的镁；这些元素通常会抑制植物的生长。我们研究了油松对蛇纹土的耐受性及其对生长的影响。在含有蛇纹石的苗圃(蛇纹岩苗圃)中种植的油松各器官的干质量没有减少。相比之下，热带雨林和冷杉的生长受到抑制。蛇形苗圃种植的油松针叶和根部的镍、镁含量最低。此外，蛇纹苗圃种植的油松的光合作用速率也没有降低。油菜具有较强的维持低浓度镍的能力，外生菌根共生可能对排出镍有积极作用。因此，油菜对镍毒害具有较高的耐受性，其光合作用能力不受镍的积累的抑制。
Picea glehnii is distributed widely on serpentine soils in northern Japan. Serpentine soil is characterised by the presence of heavy metals (Ni, Cr) and excessive Mg; these elements often suppress plant growth. We have examined the tolerance to serpentine soil and its effects on growth of P. glehnii, P. jezoensis (distributed in the same region) and P. abies (planted for timber production).The dry mass of each organ was not reduced in P. glehnii planted in serpentine soil contained nursery (serpentine nursery). In contrast, growth of P. jezoensis and P. abies was suppressed. Concentrations of Ni and Mg in needles and roots of P. glehnii planted in serpentine nursery were the lowest of the three species. Moreover, the photosynthetic rate of P. glehnii planted in the serpentine nursery was not reduced. P. glehnii has high capability to maintain low concentration of Ni, and ectomycorrhizal symbiosis may have a positive effect to excluding Ni. As a result, P. glehnii has a high tolerance against Ni toxicity, and its photosynthetic capacity is not suppressed by accumulation of Ni.