And R D Reeves, Baker A J M
Department of Chemistry, Biochemistry and Biophysics, Massey University, Palmerston North, New Zealand.
New Phytol. 1984 Sep;98(1):191-204. doi: 10.1111/j.1469-8137.1984.tb06108.x.
Plants of a serpentine (S) and a calcareous (C) population-type of Thlaspi goesingense Hálácsy were raised from seed in various serpentine and artificial limestone soils with and without Zn amendment. S- and C-plants grown on metal-enriched substrates accumulated similar, extremely high concentrations of Ni, Zn, Co and Mn in the above-ground dry matter; they also showed a marked reduction of Ca uptake, which was combined with increased Mg uptake, in all the serpentine treatments. The fate of the Ni stored in seeds was followed when S-plants were grown in normal soil. Nickel was conserved and merely diluted within the plant dry matter as growth proceeded. Seedlings transplanted from serpentine soil to non-nickeliferous soil showed similar dilution effects, suggesting little or no overall Ni loss from the plant. The similar metal-uptake characteristics and performance of plants from the two populations studied suggests a constitutional metal tolerance within the species and the existence of a non-specific metal detoxification system.
在添加和不添加锌的各种蛇纹石土壤及人工石灰石土壤中，将蛇纹石种群类型（S）和钙质种群类型（C）的高山遏蓝菜（Thlaspi goesingense Hálácsy）种子培育成植株。在富含金属的基质上生长的S型和C型植株，地上部干物质中积累了相似的、极高浓度的镍、锌、钴和锰；在所有蛇纹石处理中，它们还表现出钙吸收显著减少，并伴有镁吸收增加。当S型植株在正常土壤中生长时，追踪了种子中储存的镍的去向。随着生长的进行，镍在植物干物质中得以保存并仅被稀释。从蛇纹石土壤移植到无镍土壤的幼苗表现出相似的稀释效应，表明植物总体上几乎没有镍损失。所研究的两个种群的植物具有相似的金属吸收特性和表现，这表明该物种具有内在的金属耐受性以及存在非特异性金属解毒系统。
