介质中不同Ca~(2+)浓度对五种榕树幼苗钙含量的影响

选择高榕(Ficusaltissima)、木瓜榕(F.auriculata)、聚果榕(F.racemosa)、鸡嗉子榕(F.semicorda ta)以及对叶榕(F.hispida)5种榕树,对其幼苗进行不同Ca2+(CaCl2)浓度下的水培实验,结果表明,5种幼苗钙含量随介质Ca2+浓度的增加而增加,增加趋势大致相同。高Ca2+浓度下(10mmol/L)幼苗地上部的钙含量为低Ca2+浓度下(0.05mmol/L)的1.51～1.63倍。5种榕树幼苗钙含量随培养液Ca2+浓度变化的Yadj值的多重比较结果显示,对叶榕钙含量显著高于其他四种(P<0 01),高榕则显著低于其他四种(P<0 01),木瓜榕、聚果榕、鸡嗉子榕之间的差异不显著。不同榕树幼苗地上部分钙含量受介质钙浓度影响,但可能主要决定于基因型的差异,表明榕属植物富钙基因的存在,这为高钙榕树植物资源开发提供初步的理论依据。

Effects of calcium concentration in solution on calcium content in the seedlings of five fig plants

Seedlings of five fig plants,namely Ficus altissima,F. auriculata,F. racemosa,F. semicordata and F. hispida,were cultured in solution culture with different calcium concentration. Calcium contents in seedlings of all the five species increased with the increase of calcium concentration in solution. Calcium contents in the top of seedlings growing in higher calcium concentration (10 mmol/L) were 1.51～1.63 times than those in lower calcium concentration (0.05 mmol/L). Comparing the results of Yadj value of calcium contents in 5 fig species associated with calcium concentration in solution,it showed that calcium contents of F. hispida were significantly higher than the other 4 species (P<0.01),while those of F. altissima were significantly lower than the other 4 (P<0.01). No significant differences were detected among F. auriculata,F. racemosa and F. semicordata. Calcium contents in different fig plants appeared to be mainly determined by their genotypes while they were also influenced by calcium concentration in solution. This result implies the existence of calcium accumulation genes of ficus,which may provide a relevant information to the exploration of the calcium resource in fig plants.