CAJ | 학술논문

用无钾、低钾、中钾和高钾的液体培养基培养外生菌根真菌14～21d，随着钾离子浓度的降低，外生菌根真菌分泌H＋和草酸的速率提高。由于H+能取代2∶1型粘粒矿物晶层和晶格内的钾，草酸能络合矿物中的Fe、Al离子，促进Al-O八面体风化，推测菌根真菌和菌根活化土壤无效钾的能力在低钾时较强，在高钾时较弱。在外生菌根真菌分泌的H+中，草酸电离可能不是它们的主要来源，而是一些目前尚未知道的有机酸。此外，液体培养基中的钾离子不同程度地影响外生菌根真菌体内的氮、磷、钾含量，看来环境中的钾离子供应影响了真菌菌丝对养分的吸收。
용무갑、저갑、중갑화고갑적액체배양기배양외생균근진균14～21d，수착갑리자농도적강저，외생균근진균분비H＋화초산적속솔제고。유우H+능취대2∶1형점립광물정층화정격내적갑，초산능락합광물중적Fe、Al리자，촉진Al-O팔면체풍화，추측균근진균화균근활화토양무효갑적능력재저갑시교강，재고갑시교약。재외생균근진균분비적H+중，초산전리가능불시타문적주요래원，이시일사목전상미지도적유궤산。차외，액체배양기중적갑리자불동정도지영향외생균근진균체내적담、린、갑함량，간래배경중적갑리자공응영향료진균균사대양분적흡수。
Ectomycorrhizal fungi were grown in the liquid culture medium for 14 to 21 days.The efflux rates of H+ and oxalate by the fungi were increased as the concentration of potassium decreased in the medium.Taking into account of potassium replacement in the interlayer of 2∶1 clay minerals by H+ and the weathering of Al-O lattices by oxalate,the higher ability of potassium mobilization by ectomycorrhizal fungi could occur in insufficient potassium systems than that in sufficient ones.Moreover,H+ in the liquid culture medium at harvest was not mainly from oxalate but from some unknown matters such as organic acids.The concentrations of nitrogen,phosphorus and potassium in the fungi were influenced variedly by the potassium in the culture medium.It suggests that their absorption by the hyphae could be affected by the external supply of potassium.