Waldren S, Davies M S, Etherington J R
Department of Plant Science, University College, P.O. Box 78, Cardiff CF1 1XL, UK.
New Phytol. 1987 Aug;106(4):679-688. doi: 10.1111/j.1469-8137.1987.tb00168.x.
Root elongation of Geum rivale and G. urbanum grown in nutrient solution decreased as manganese concentration was increased above 25 mg dm , especially in G. urbanum. Prior exposure of roots to 25 mg Mn dm increased their capacity for subsequent elongation in manganese solutions, the effect of such pretreatment being most pronounced in G. rivale. G. rivale was significantly more tolerant of 50 mg Mn dm than G. urbanum. Efflux of potassium from root segments, used as a measure of membrane permeability, was significantly higher in G. urbanum than in G. rivale at this concentration. Tolerance of 50 mg Mn dm by progeny of hybrid individuals was generally related to morphological intermediacy, although there were some noticeable exceptions. Manganese tolerance of hybrids could not be consistently related to their known tolerance of waterlogging.
在营养液中生长的水杨梅和林地水杨梅的根伸长随着锰浓度增加到25毫克/立方分米以上而降低，在林地水杨梅中尤其如此。根部预先暴露于25毫克锰/立方分米可提高其随后在锰溶液中的伸长能力，这种预处理的效果在水杨梅中最为明显。在50毫克锰/立方分米的浓度下，水杨梅比林地水杨梅对锰的耐受性显著更高。在该浓度下，用作膜通透性指标的根段钾外流在林地水杨梅中显著高于水杨梅。杂种个体后代对50毫克锰/立方分米的耐受性通常与形态中间性有关，尽管有一些明显的例外。杂种对锰的耐受性与其已知的耐涝性之间没有一致的关联。
