镧和铈对灵芝菌丝生长的影响

La（NO3）3和Ce（NO3）3在浓度不同时对灵芝菌丝的生长及其培养液中的残糖量的影响不同。2mmol／LLa3＋和Ce3＋能抑制灵芝菌丝的生长，抑制率分别为32．58％和42．76％；低浓度（≤1mmol／L）的La3＋和Ce3＋能促进菌丝生长，以0．5mmol／LLa3＋和Ce3＋的促进率最高，分别达到35．21％和57．01％，且随浓度的降低这种促进作用逐渐降低。菌丝生长量与培养液中的残糖量没有明显的相关，只有生长量最大的0．5mmol／L的La3＋和Ce3＋的培养液中的残糖量比对照低，其余皆比对照高。

Effects of La3+ and Ce3+ on the Growth of Lingzhi (Ganoderma lucidum)

Different concentrations of La³⁺ and Ce³⁺ showed different effect on the growth and residual sugar con-tent of Ganoderma lucidum cultural meduim. At a concentration of 2 mmol/L, La³⁺ and Ce³⁺ inhibited 32. 5800 and 42. 760o respectively the growth of G.lucidum myceluim,whereas lower concentration(<1 mmol/ L)promoted the growth of myceluim.with 0.5 mmol/I. showing the maximum effect,which attained an in-crease of 35. 21%and 57. O1%respectively. Thereafter.the effect on growth regressed as the concentration was further lowered. The effect on growth was not notably relative to the residual sugar content of the cultur-al medium,which was lower than the control at the maximum growth effect of 0.5 mmol/L concentrations of La³⁺ and Ce³⁺.while higher than the control at all other concentrations.