低磷胁迫对西瓜苗期铁、锰、钙、镁吸收的影响

Effects of low phosphorus stress on iron,manganese,calcium and magnesium uptake in watermelon seedlings

采用植物生长箱溶液培养方式,研究了低磷(P)胁迫对7个西瓜品种苗期铁(Fe)、锰(Mn)、钙(Ca)、镁(Mg)吸收的影响。结果表明,低磷胁迫会影响西瓜Fe,Mn,Ca,Mg的吸收。低磷胁迫使西瓜Fe的吸收降低,而对Mn、Ca和Mg吸收的影响则因品种而异。在低P胁迫条件下Ca,Mg的吸收表现出了极显著的正相关性。以相对元素含量为筛选指标研究低磷胁迫下7个品种Fe、Mn、Ca、Mg吸收的差异。结果表明,在低磷胁迫下,早佳和早春红玉为Fe高效吸收基因型,早佳为Mn高效吸收基因型,丽芳为Ca和Mg高效吸收基因型。

Effects of low phosphorus（P） stress on iron（Fe）,manganese（Mn）,calcium（Ca） and magnesium（Mg） uptake in watermelon seedlings of seven cultivars were studied in this paper by the method of plant solution culture.It has been demonstrated that low P stress can affect the Fe,Mn,Ca and Mg uptake in the seven watermelon cultivars.Low P stress can reduce Fe uptake of watermelon,but the effects of low P stress on Mn,Ca and Mg uptake were different among cultivars.There were significant and positive correlation between Ca and Mg uptake under low P stress.The differences of Fe,Mn,Ca and Mg content among the seven cultivars were studied with the relative content of elements as screening parameters.Our results showed that Zaojia and Zaochunhongyu were identified as the Fe high efficient uptake genotypes,Zaojia was identified as the Mn high efficient uptake genotype,Lifang was identified as the Ca and Mg high efficient uptake genotype under low P stress.