University of California, Davis, California.
Plant Physiol. 1966 Sep;41(7):1095-101. doi: 10.1104/pp.41.7.1095.
The uptake of iron (Fe) by VF-36 tomato plants as influenced by root temperature and manganese (Mn) nutrition was studied. Following a 1-week pretreatment period of various levels of Fe and Mn in the nutrient solution in a controlled temperature room, the uptake of (59)Fe from ferric ethylenediamine di(O-hydroxyphenylacetate) (FeEDDHA) at 1 mumole per liter was studied for periods of 1 to 5 days.Both Fe uptake and translocation were enhanced by increases in root temperature. Varied levels of Fe in the pretreatment period led to increased levels of Fe in the plant, which subsequently depressed further accumulation of (59)Fe. The effect of increased root temperature on (59)Fe uptake and translocation was decreased by increases in the level of Fe in the pretreatment cultures. As Mn in the nutrient solution was increased, (59)Fe uptake and translocation were increased to a point and then decreased.The degree of Fe saturation of the plant appeared to be a primary factor in regulating Fe uptake and translocation in the plant. As the Fe saturation of the plant decreased, the uptake of Fe in response to metabolic processes of the plant increased, as evidenced by increased response of absorption to root temperature.
研究了根温与锰营养对 VF-36 番茄植株吸收铁（Fe）的影响。在控温室内用含有不同铁和锰浓度的营养液对植株进行了 1 周的预处理后，研究了在 1 至 5 天内用 1 微摩尔每升的乙二胺二邻羟苯基乙酸铁（FeEDDHA）处理时植株对 59Fe 的吸收情况。根温升高会促进铁的吸收和转运。预处理期间铁浓度的变化会导致植株中铁含量增加，从而抑制进一步积累 59Fe。预处理培养液中铁浓度增加会降低根温升高对 59Fe 吸收和转运的影响。随着营养液中锰浓度的增加，59Fe 的吸收和转运先增加，然后减少。植株的铁饱和度似乎是调节植株铁吸收和转运的主要因素。随着植株铁饱和度的降低，植物对代谢过程中铁的吸收增加，这从吸收对根温的反应增加中可以得到证明。
